PRODAS

PRODAS has become the world standard for integrated weapon design tools.

PRODAS V3.5 is the world’s only integrated software system specifically designed to analyse all types of projectiles.

From the smallest match bullets to GPS guided artillery shells, PRODAS brings together:

• Modeling – Build a model from a drawing or even a picture
• Aerodynamics – Compare aerodynamic coefficents from multiple aero estimators
• Launch Dynamics – Interior ballistics, balloting and jump
• Trajectories – Fly 4DOF, 6DOF and Body Fixed and Guided Trajectories
• Terminal Effects – Estimate penetration of KE projectiles and lethality of fragmenting or shaped charge warheads
• System Effectiveness – Using focu

Tailor PRODAS To Meet Your Needs By Adding Optional Analysis Modules

• Gun and Ammunition Developers can add:
  • Interior Ballistics
  • Case/Chamber Analysis
  • Balloting Analysis
• Guided Munitions Experts will need:
  • Controlled Trajectory
  • Guided Projectile Trajectory
• All Users Can Benefit From The Unique Capabilities Provided By:
  • 3D Visualization
  • Software Development Kit

The PRODAS V3.5 Main Analysis Package Includes: ·

Visual Model Editor & IGES File Import & Export

Projectiles are quickly created using the PRODAS model editor.

Designed and optimized for projectiles, it is much quicker and easier to use than a standard CAD package.

Drag and drop projectile assemblies or components from one projectile to another.

Trace a Bitmap

The optional module Projectile Tracing Tool will allow you to quickly build a model from an bitmap of a cross section.

Click HERE for more information

DXF & IGES File Write!

PRODAS V3 can create IGES (V 4.0) & DXF Files for easy output to CAD Systems.

Logical Model Structure

Simple Elements are combined to describe the geometry of Components. Material properties are defined at the component level. A Material Reference Book is included to ease this process. Components are combined to make up Assemblies. Assemblies can be combined to form higher level assemblies.

Mass Properties

Calculate weights, inertias and CG from the model

Mass property results are stored in the projectile file to be used in subsequent analysis.

Experimental data can be entered and “locked”. The system will use this data and calculate only the unknown values.

Properties are calculated before and after burnout of a rocket motor or fumer.

Aerodynamic Coefficient Prediction

Computes a complete set of aerodynamic force and moment coefficients!

Includes analysis capabilities for

• Spin, Fin or Drag Stabilized Shapes
• Computes Attack Angle & Roll Induced Coeffs for Finners
• Calculates Dynamic & Gyroscopic Stability
• Multiple Fin Groups
• Wrap Around Fins
• Grooved Body (Buttress)
• Flare/Conical Stabilized
• Spike Nose, “Stubby”
• Aeros up to Mach 8

Aerodynamic Stability Analysis

Keep them flying STRAIGHT

• Static Stability
• Dynamic Stability
• Gyroscopic Stability
• Coefficients under a variety of launch conditions.

Muzzle Exit / Dispersion

Estimate projectile dispersion from in-bore clearances, and/or C.G. offset.

Perform Dispersion Sensitivity Analysis

Determine Muzzle Exit Effect

4 & 6 DoF Fixed Plane Trajectory Simulation

• Trajectory Simulation
• Compute complex trajectory effects with either a 4 or 6 degree of freedom simulation. Trajec-tory files can be saved for cross plotting or for use in Armor Penetration Module.
• 4DOF and 6DOF Models
• Moving Platform option
• Rocket Motor Simulation
• Aerodynamic Asymmetries
• Winds

Ballistic Match

1. Create Range vs. Quadrant Elevation tables and estimate maximum range in minutes.
2. With Ballistic Match, projectile performance parameters can be modified quickly to achieve a desired Drop vs. Range
3. Ballistic Match runs a series of 4 DOF trajectories between 0 and 80 degrees elevation and saves impact points, impact conditions, angle of fall, and culmination ranges and altitudes.
4. Ballistic Match automatically iterates the gun quadrant elevation, saving the designer tiresome iterations to make a bullet strike a target at a given range.
5. The required quadrant elevations and key trajectory parameters for each range interval are saved for quick reference.
6. Ballistic Match can be used alone, to display maximum range and quadrant elevation information, or it can be used in conjunction with the trajectory module to generate initial conditions.

Lot Acceptance Test (LAT) Simulation

A statistical simulation for estimating the long term pass probability of Lot Acceptance Tests with various pass criteria.

• Use LAT to simulate dispersion tests before expending valuable test resources.
• Understand the impact of random variation on pass/fail probability.
• Adjust sample size and acceptance criteria to design an effective test and eliminate “false failures”

Inputs

• Select from three standard dispersion measurement criteria
  • Sigma X-Sigma Y
  • Mean Radius
  • Extreme Spread
• Enter Sample Size and Acceptance Criteria

Current (or expected) Projectile Performance

Five thousand (5000) LAT’s are simulated, and individual results are accumulated. Mean dispersion, dispersion standard deviation and probability of passing the test are output.

The standard deviation in mean point of impact (MPI) is also displayed to assist system engineers in assessing statistical variability of a burst center point as a function of ammunition dispersion and the number of rounds fired in a burst.

Yaw Card

1. Determine Cm and Cmq with no more than a tape measure, plumb bob, photographic paper,and a few 2×4’s.
2. The Yaw Cards data reduction module is used to extract pitching moment coefficients (Cm),
3. pitch damping moment coefficients (Cmq) and Magnus Moment (Cnp) coefficients from yaw
4. card data.
5. This includes data from spin stabilized projectiles plus statically stable bullets with either low or moderate spin.
6. Cm influences the gyroscopic stability factor (especially critical at launch) and dispersion sensitivity, while Cmq and Cnp affects the damping of the projectile yaw motion as it travels down range.

Series of target cards

•Record total angle of attack & pointing vector

change vs. distance from muzzle

Advantages:

• Simple technique
• Low cost “instrumentation”

Provides:

• Pitching moment, pitch damping, Magnus moment, roll moment, roll decay moment
• Is yaw causing dispersion or only MPI shift?

Drawbacks:

• Need sufficient yaw to allow observation (Yaw Inducer Needed?)
• Yaw card impact affects projectile motion

PRODAS V3.5 Optional Analysis Modules

Additional Library Rounds

1. Additional projectile data files can save you time and money when beginning new designs or evaluating existing
2. The basic PRODAS V3.5 anal-ysis system is shipped with 22 inventory rounds.
3. These files were created from known technical data and where available, actual aerodynamic coefficient data is included and supersedes the SPINNER or FINNER predictions. Known interior ballistic performance at ambient is also in the data file, providing the user with baseline launch environments.
4. Additional optional rounds are available from Arrow Tech with the same known performance “hard-wired” into the data file.

Analysis BOT

Create Macro Scripts automatically with the Analysis BOT. Using the Analysis BOT interface desig-nate the projectile models, desired analysis, input variables and desired output. The Analysis BOT will then automatically generate the Macro Script. The user can then save the Analysis BOT workbook or Macro Script for future changes or customization. The script can be accessed in the future via the “Tools” menu. The Analysis BOT is included with any of the Gun System Effectiveness modules or can be purchased separately.

• Access any analysis module within PRODAS
• Iterate the analysis by changing one or more inputs/projectiles
• Generate outputs including cross plots, summary tables and text outputs.
• Automatically generates script files that can be saved, modified and then rerun later

Select an Analysis Module

•All analysis modules enabled on your machine will be contained in the drop down list box

•Select the module you want to exercise

Select one or more PR3 files

•You can;

• Iterate on a single projectile, changing inputs
• Iterate on different projectile files
• Combination of both

•Browse the projectile of interest

•Enter a unique comments

•Click on the “Add” button.

•The Comment will be added to help identify the run

•You can uncheck a run to temporarily remove it from the execution

• As a by product of executing the BOT, a macro is produced
• You can save it for later use
• Run it from the “Tools/Edit-Run VB Script” from the main menu

Initial Conditions Generator

Aero Manager

Different aerodynamic estimation algorithms will produce different sets of aerodynamics. Each algorithm has its strengths and weaknesses, for example one may do a good job on drag, but another does better on normal force. But each will develop a complete set of aerodynamics. Add to this aero data generated during testing and one can quickly be-come overwhelmed with numbers.

The PRODAS Aero Manager was developed to help to help the aero ballistician manage this potential mountain of aerodynamic data.

Aero coefficients from different sources are cross plotted against each other. Experi-mental data can be added in as well. The user can then use any source as a starting set and then change all points or even individual points to better fit their engineering judg-ment. These modified tables can then be used to drive the other PRODAS analyses.

The Aero Manager is included at no charge when you purchase an option aero estimation code such as MISL3.

• Multiple sources can be analyzed within the Aero Manager
• DATCOM
• Spark Range
• Zeus
• CFD
• Wind Tunnel

Interior Ballistics

Contains both Empirical Database and Numerical Integration Interior Ballistics routines

• Empirical Database
  • Based on 5 million 50 Caliber test firings at Frankfort Arsenal
• Numerical Integration IB (Modified Baer Frankle)
• Interior Ballistics analysis calculates velocity, breech & base pressure, linear and angular accelerations of the projectile during travel down the tube.
• The analysis uses modified Baer-Frankle method for simulating interior ballistics.
• The analysis will analyze cylindrical, spherical & flake propellant geometries.

• You can use the interior ballistics analyses to trade off propellant weight versus projectile weight, investigate the band wear effects of different barrel twists, even estimate the effects of propellant blending.
• The Interior Ballistics analysis calculates the velocity, breech and base pressure, linear and angu-lar accelerations of the projectile during travel down the barrel.
• A simplifed Interior Ballistics analysis is available that is derived from the Baer – Frankle meth-od for predicting interior ballistics, examining the burning of the individual propellant grains.
• Or, if you prefer, PRODAS V3.5 has a user friendly interface for IBHVG-2.

Reference libraries are provided with detailed information on propellant geometry and burn characteristics as well as igniter and gun parameters.

Rocket Firing Tables

• Purpose – Enable PRODAS users to produce key tables in NATO STANAG 4119 format
• •Trajectory Code – Modified Point Mass Model similar to the ARL model
• Tables Currently Available
  • Artillery (F and G)
  • Direct Fire
  • Mortar (D and E)
  • LOS Air Marine
  • Rocket Firing Tables (Ballistic) Utilizes 6DOF for thrust phase)
    • Accurate angular motion due to winds

• 6 DOF Body Fixed Trajectory with Launcher Routine
• Calculates Launch velocity, gravity drop and launch angular rates
• Based on user input thrust curves
• Utilized in Rocket Firing Tables/Rocket System Simulation

Terminal Effects

PRODAS V3.5 has a complete computational suite to assess the terminal effectiveness of warheads. Armor penetration of kinetic energy penetrators, and the fragmentation of high explosive warheads, can all be easily, quickly, and accurately assessed.

• Calculates V50 and R50 for armor penetration
  • Bal66 Algorithm for penetrator L/D lower than 7
  • Lambert Algorithm for penetrator L/D over 7
  • Monolithic Armor
    • BAL66 Allows Brinell Hardness input
    • RHA and Aluminum assess in Lambert Algorithm
  • Multiple Obliquity Angles
• Calculates Fragmentation for HE and HEI projectiles.
  • Fragment weight
  • Throw velocity

Kinetic Energy Projectile Penetration

Select from two closed-form penetration prediction algorithms based on the penetrator length-to-diameter ratio:

• BAL-66: L/D up to 10:1
• Lambert: L/D up to 30:1

High Explosive Fragmentation

Gurney-Mott-Sarmousakis methodology to predict the fly-off velocity, spray angle, and fragment mass distribution of naturally fragmenting projectile bodies.

3D Visualization with Scene Generator

Generate visuals of your model in 3D solids. Position the model in any orientation, sec-tion it and produce movies of your projectile in flight. Simulated firing ranges, gunner and target images are provided to increase the impact of these movies. The 3D Visualizer has the ability to animate projectile motion in flight.

• Quickly render 3D representation of Projectiles
• Cut away Views
• Visualize Trajectories
• Full Shooter to Target Videos

Projectile Tracing Tool

Whether the image comes from the Web, a brochure or a photo-graph of a sectioned projectile, you can now quickly build an accurate PRODAS model with a couple of clicks of the mouse.

Firing Tables

• The Firing Table analysis is intended to calculate provisional firing tables for situa-tions where standard Firing Tables are not available.
• The analysis methodology used to calculate the trajectory is a Modified Point Mass Tra-jectory code.
• In this module, a series of trajectories over a range of elevation angles and a range of pa-rameters (i.e., winds, muzzle velocity, etc.) are computed and the point of impact, impact conditions, and culmination location are saved.
• Once the Firing Table analysis is complete, either tabulated or plotted output is available.

• Create Firing Tables for the following weapons
• Direct Fire
• Howitzer
• Mortar

Firing Tables, including sensitivity factors, can be generated easily in minutes.

• Other Firing Tables Available:
• Line of Sight
• Line of Sight Air/Marine
• Artillery System Analysis

Purpose – Enable PRODAS users to produce key tables in NATO STANAG 4119 format

• Trajectory Code – Modified Point Mass Model similar to the ARL model
• Tables Currently Available
• Artillery (F and G)
• Direct Fire
• Mortar (D and E)
• LOS Air Marine
• Rocket Firing Tables (Ballistic) Utilizes 6DOF for thrust phase)

•Accurate angular motion due to winds

Body Fixed 6 DOF Trajectory

Along with the 4 and 6 degree of freedom fixed plane trajectory simulations (The projectile ro-tates within the axis system) PRODAS also has 6 Degree of freedom Body Fixed simulation modules. In the body fixed trajectories the projectile axis rotates with the projectile allowing simulation of asymmetric physical properties (Cg offset and Principle axis tilt), trim angles and the resulting launch and downrange effects. Outputs include the standard trajectory output and the body states of the projectile.

Additional options include rocket launcher simulation where the launch-er parameters such as launcher diame-ter, launcher length, release détente force, rocket bourelet length, and total rocket length are input. This algo-rithm then calculates the in launcher velocity, spin generated by the input thrust vs. time curve or launcher ri-fling and angular motion at exit caused by gravity drop. These exit conditions are then transferred to the initial con-ditions of the Body fixed 6DOF to continue the flight simulation down-range.

Software Development Kit

Now use our own software development tools to efficiently integrate your in-house developed analyses with PRODAS V3.5

Customize PRODAS for your business with the Software Development Kit

• Integrate your own proprietary analysis with PRODAS.
• Use the same tools Arrow Tech used to develop PRODAS.
• New modules appear on the menu, use mass properties, aerodynamics or any of the data contained in the PRODAS data file.
• Present results as text or plots, send data to cross plots or even use the visualizer to display results.
• Outputs of your new analysis will be saved as part of the Projectile File.

Three tools are provided with the Software Development Kit

• Data Manager – This tool manages the data that is contained in the PRODAS data file. When you add your own analysis, chances are there will be setup data that you will want stored in the PRODAS data files along with the regular data. The expandable architecture design of the data file allows for user-defined data without impacting oth-er analysis modules.
• Analysis Manager – This tool defines and actually codes (in FORTRAN) the interface between the main PRODAS application, which contains the user interface, and your analysis module.
• Form Manager – This is the tool used to build the user interface for a new analysis. Everything is done with a drag and drop editor making it easy to build the required input and output windows. You define the data your user enters and what output they are presented with. Text files, spreadsheet tables or plots are quickly included in the interface with no coding required.

• User Interface development without coding
  • All unit conversions handled by the main menu
• Presentation Level Graphics
  • Scientific Plots
  • Projectile Model Display
  • Cross Plots
  • 3D Visualization
• Easy interface with Reference Books
• Natural for Sequential analysis
  • Analysis #1 Results -> Analysis #2, Results -> Analysis #3
• Macro capability can automate repetitive tasks

MISL 3 Aero Prediction Code, Missile Datcom & AP 98

Multiple sources can be analyzed within the Aero Manager

• DATCOM
• MISL3
• Spark Range
• Zeus
• CFD
• Wind Tunnel

Structural Analysis Modules

Sabot Profiler (REBAR)

The Sabot Profiler is a one dimensional structural analysis of the projectile/sabot system caused by longitudinal accelerations within the barrel. The software calculates the nominal axial stress distribution along the length of the projectile and can be used to optimize the the shape (mass) of the selected piece parts, primarily sabots for long rod applications. The pre-dicted stress levels obtained are very close to those obtained by more detailed Finite Ele-ment Method (FEM) solutions. Therefore, Profiler can be used as an efficient optimization tool.

The output parameters calculated for the projectile/sabot system caused by the longitudinal accelerations within the barrel are then used to perform the In Bore Balloting analysis.

• Assess Stress and shear levels within the sabot
  • Assess compression tension loads on projectile penetrator buttress grooves

• 1D Structural Analysis for maximizing muzzle velocity via Sabot Design
  • Analyzes set back Load and stress and strain levels of
    • Penetrator core at grooves
      • First and Last Buttress groove location
      • Groove Minimum Diameter
      • Material Properties
  • Sabot
    • Material properties

Cartridge Case Analysis System

Simulate Case Deflections & Chamber Interaction during firing pressurization

The modeling and analysis of a cartridge case requires an elastic-plastic, thermal, dynamic solution. The use of general purpose finite element programs for case analysis can be very expensive and la-bor intensive because the model must contain many elements to obtain stress distributions in the thin cylindrical wall region of the case and in the base region. Additionally, the case material can exceed its yield point for a large part of the interior ballistic cycle, requiring an inelastic analysis with relatively long computation times.

To improve computational and parametric design efficiency, Arrow Tech Associates, Inc. has de-veloped an analytical tool specifically to analyze cartridge cases, called CASAS (CASe Analysis System).

CASAS is a primary analytical tool to perform the elastic-plastic, dynamic analysis (including tran-sient heat effects) required for cartridge case design.

• CASAS simulates the dynamic interaction of the cartridge case and gun chamber in five (5) phases of the firing cycle:
  • Initial Conditions (definition of material properties such as modulus, density, coefficient of thermal expansion, thermal conductivity, along with case-chamber gaps & bolt stiffness.)
  • Propellant Ignition (initial case contact with the chamber wall.)
  • Pressure Load Increase to Maximum (maximum composite structure deflection)
  • Elastic case recovery as the internal pressure decays to atmospheric conditions.
  • Residual Case/Chamber condition clearance or interference between the case and the chamber, case extraction force.

• CASAS is ideal to perform the following case/chamber parametric studies:
  • Dimensional
  • Stress-Strain Curve
  • Chamber Pressure
  • Friction Coefficient
  • Extraction Temperature
  • Case/Chamber Gap Size
  • Static Head Space
  • Dynamic Head Space

• CASAS output includes:
  • Maximum Total Plastic Case Strain (assess case failure)
  • Extraction force required
  • Maximum Bolt Load

In Bore Balloting (BALANS)

Complete simulation of projectile/gun interaction during interior ballistics cycle and then flyout to target

Simulates the Dynamic Response and Interaction of a Flexible Projectile and a Flexible Gun Tube During In-Bore Travel

Using BALANS you can describe the projectile and tube with up to 50 lumped mass nodes and connecting beams each, compute the deflection of the projectile and gun tube during movement of the projectile from breech to muzzle exit and, determine the balloting contribution to disper-sion.

BALANS analyzes the dynamic response and interaction of a statistically representative, flexible projectile and a flexible gun tube during in-bore travel., in a time step iterative solution. BALANS assumes the projectile is initially misaligned in the gun tube due to manufacturing tol-erances. During firing, this misalignment produces secondary forces causing transverse dis-placement and yawing motion of the projectile as it travels from breech to muzzle.

The resulting yaw angle and angular rate at muzzle exit are then analyzed for their effect on dis-persion.

• BALANS features the following:
  • Projectile Modeling
  • Gun Tube Modeling
  • Bore profile definition
  • Forcing Function Definition
  • Initial Condition Definition
  • Automated Statistical Evaluation of Dispersion
  • Gun Tube
  • Motion
  • Muzzle Exit Transverse Velocity
  • Projectile
  • Motion
  • Shape
  • Stress
  • Projectile / Tube Interface Reaction Loads
  • Tube Support Reaction Loads

•Monte Carlo error Sources

•Run Internal Balloting on 500 cases

•Collect Angular Rates at Muzzle

•Run Body Fixed Six Dof for each set of angular rates to target impact

•Calculate dispersion performance on target

System Effectiveness Modules (Includes Analysis BOT Module)

The following optional analysis modules are advanced PRODAS modules and require the PRODAS Main Analysis in order to run. All four of these modules includes the Analysis BOT module (AT639/A)

The system effectiveness series of analyzes are designed to evaluate the lethality of gun-ammunition-fire control systems against a variety of targets.

There are analysis modules designed to evaluate many different missions:

• Air Defense (ground to air)
• Anti-ship Missile Defense (ship to air)
• Ground Warfare (ground to ground)
• Air Warfare (air to air, both fixed wing and helicopter)
• Ground Support (air to ground, fixed wing, helicopter and gun ship)

Using this suite of tools, you can quickly evaluate candidate ammunition and gun systems, burst lengths, targets, sensor errors and system accuracy. Analysis output is focused on the effectiveness in hitting and killing the intended target. Subsequent analysis (maintainability, reability, affordability, life cycle) is required to determine cost effective solution parameters.

Air to Air

Fighter aircraft engagements with single and multi barrel sys-tems.

• Air to Air – Assessment of on board gun system
  • Fighter to Fighter/Helicopter to Helicopter
  • Includes aircraft speed and heading and engagement scenario (Head to Head, Side engagement and Tail engagement

•Lethal area of target

Air to Ground

Helicopter, Fixed Wing engaging armored or materiel targets. Both Gun and Ground Attack Missile

• Air to Ground – Ground support assessment
  • Heavy to light armor vehicle targets
    • Presented target area based on aircraft speed and dive angle

Ground to Air

Air Defense, Missile Defense, UAV Engagement, Impro-vised Munition Engagement

• Ground to Air – Anti Aircraft or Anti Missile assessment
  • –Crossing range
• Air Defense (ground to air)
• Anti-ship Missile Defense (ship to air)

Ground to Ground

Vehicle to Vehicle, Dismounted Troops, Direct and Indirect fire missions, Point Detonating and Air Burst Fuzing. Projectile and Artillery Rockets

• Direct Fire Targets or Indirect
• Armored Vehicles, Soldiers Deployed, Materiel
• Air Bursting Fuzes Point Detonation

Radar

Accurate Extraction of Drag Coefficients and Tracer Performance from Doppler Radar Data

Radar 2000 and Radar Assistant Analysis

RADAR 2000 uses the equations of motion along with non-linear drag versus Mach Number for the most accurate computation of drag coefficients possible. A powerful differential correction technique is used to rapidly converge on a combination of selected coefficients which most accurately matches the experimental radar data.

This program was developed on main frame computers and has been used to reduce radar data for both

RADAR 2000 features:

• Easy to use, menu driven and designed for high speed data entry and reduction
• Support for ALL radar types using a user configured ASCII file in-terface including , Weible, Hawk, and Terma
• Analysis of high gun elevation angle shots (long range artillery or mortar)
• Accurate analysis of traced or base bleed projectiles
• Single shot and/or group reduction analyses
• Multiple (user controlled) raw data filters
• PRODAS V3.5 interface for inputting projectile parameters and initial coefficient estimates
• Interface to Meteorological Data file to input atmospheric data
• Impact point prediction

RADAR Assistant Features:

• Windows / VB Front End for Easy Use
• Point-point drag & decel analysis from velocity data makes it easy to spot significant trajectory events (e.g. tracer burnout, dynamic instability, submunition ejection, etc)
• Output available via tabular or plots, easy to paste into re-ports.

Guided Projectile/Rocket Modules

Rocket Motor Design Tool

The Rocket Motor Design Tool module of PRODAS are rocket motor interior ballistic codes written by Talley Defense which provide a transient, dynamic burn model for four (4) specific rocket motor grain geometries: Segmented, Star, Slotted, and Wagon Wheel

Surface geometry computations, along with thermochemical and gas dynamics equations allow computation of internal combustion pressure, thrust, impulse, mass flow, surface area and web as a function of time.

Combustion properties of standard rocket motor propellant grains are loaded from a PRODAS Reference Book, as shown below:

The effects of nozzle geometry, grain geometry, propellant burn rate, propellant thermochemi-cal properties, igniter properties and booster properties on rocket motor performance can be as-sessed.

Hand-off of rocket motor thrust vs. time to either 4 degree-of-freedom (DoF) or 6 DoF trajecto-ry modules is automatic within the PRODAS environment, providing the user with an accurate, close coupled simulation ideal for assessing the performance of either ballistic or guided rocket systems, including dispersion.

Controlled Trajectory

Six Degree of Freedom Control Flight Simulation Program for Fin Control, Lateral Thrust, or Impulse Control

Use a 6DOF Trajectory Simulation to evaluate response to control inputs from fins, canards and squibs. Control inputs are pre-programmed and applied during the trajectory.

Determine the efficiency and capability of a control method as implemented on your flight vehicle de-sign. Perform this critical step in the development of a guided flight vehicle before moving on to a full guided vehicle simulation such as the Guidance Navigation and Control Simulation Module (AT 630).

The six degree of freedom (6DOF) Control Flight Simulation Program (CONTRAJ) evaluates flight performance, provide trade-offs, and design verification. Pre-programmed control phases are defined during the input phase of operation. CONTRAJ allows for two types of control concepts, (1) fin con-trol, and (2) lateral thrust or impulse control. The flight dynamic equations of motion are developed relative to a body-fixed reference frame. Asymmetries in both mass and aerodynamics can be includ-ed.

CONTRAJ includes two 6DOF equations of motion models. The fixed plane model requires mass and aerodynamic symmetry with the exception of slight aerodynamic asymmetries such as trims or roll induced effects. The body fixed model allows both inertial and aerodynamic asymmetries such as an airplane configuration.

1. 6DOF – Fixed Plane – non rotating coordinate system

2. 6DOF – Body Fixed – rotating coordinate system

CONTRAJ can be used to assess the control authority of guided projectile with various flight control concepts, or assess the angle of attack developed and flight path deviation of ballistic projectiles sub-jected to external disturbances (e.g. sabot discard)

Guidance Navigation and Control Prototype Tool

• Guidance, Navigation and Control Prototype Tool Module combines both functions into a single drag and drop “Windows” style simulation
• Joint effort between Arrow Tech, Georgia Tech and the Army Research Lab (ARL).

This unique module combines a guidance and control simulation with a body fixed 6DOF trajectory simulation. A drag and drop editor is provided to quickly build a flight control system from common control system elements. Also provided is an “oscilloscope” feature to help design and troubleshoot the control system. This analysis module is a powerful develop-ment tool where trade studies can be completed quickly, getting you r design ready for final modeling and analysis using the Guidance Navigation and Control Simulink Builder (AT-645/A).

A wide variety of control system building blocks are available including: gain, sum, multi-ply, state specific filters, polynomial filters, trigonometric functions, triggers, sample and hold, accelerometers, inertial to body transformations, single axis transformations, constants, table look ups etc. The user constructs a control system by appropriately arranging control system building blocks. The software properly couples all control system elements together. Any physical parameter of the projectile model can be dynamically controlled. With this ar-rangement, virtually any projectile or missile flight control system can be modeled in detail.

Guidance Navigation and Control SIMULINK Builder

PRODAS is known for its seamless integration of analysis and simulation software tools from various disciplines in a graphical environment with a simple user interface. Now PRODAS has taken a dramatic leap forward by integrating with MATLAB® and Simulink®. The MATLAB® world is massive with general purpose programming and scientific computation and toolbox and blockset extensions for specific applications. With the integration of this powerful capability into PRODAS, a new paradigm of rapid and reliable system simulation for smart munitions is made possible.

MATLAB/Simulink Trajectory Module Features;

• Modeling in Simulink®
• System Simulation
• PRODAS Integration
• Concept to Production

Modeling in Simulink®

PRODAS Blockset – Leverage the highly validated PRODAS 6+DOF trajectory block as the starting point for your simulation.

Use lower-level blocks to build your own trajectory module such as aerodynam-ics, mass properties, rocket motor, squibs, and more. Customize any PRODAS block to meet your specific modeling needs.

100% Compatibility with All Simulink® Blocksets – Use any of your licensed Math Works products to build your simulation. The integra-tion with PRODAS does not place any restrictions on what you can do with MATLAB® and Simulink®.

Design Your Guidance, Navigation, and Control (GNC)

Sys-tem – Use the PRODAS blockset, the Aerospace blockset, and your own custom blocks to design the GNC system. The de-fault template provides an empty GNC subsystem with all the connections to the 6+DOF to enable close-loop control.

For More Details CLICK HERE