Simulation and Research Services DivisionPatuxent River, Maryland

Roger BurtonAir Vehicle Branch Head

Program Manager301-866-6715

roger.a.burton@saic.com

MEETING No. 95AEROSPACE CONTROL AND GUIDANCE SYSTEMS COMMITTEE

Sheraton City CentreSalt Lake City, UtahMarch 2 – 4, 2005

Present SAIC Patuxent River Office

History

• Supporting the Navy at Patuxent River since 1970’s as Systems Control Technology- Acquired by SAIC in 1994

• Local Office opened in 1983• Air Vehicle Support (AVS) Contract

(AFTTECH) since 1983. – We are the aero & controls SMEs for Pax

Technical Capabilities

• Flight Simulator Development and Acceptance• Simulation/Stimulation technology

– Real-time and physics based modeling– Hardware and software

• Flight Test Support– Planning– Execution– Analysis-Specializing in Systems Identification

• Modern Controls/Optimization– UAV Control Systems– Control analysis– IV&V– Specification Compliance– Handling qualities

V-22 High Fidelity Simulator M2DART Platform

Roll In/ Roll Out Capability 6 Degree Of Freedom Motion Platform

MANNED FLIGHT SIMULATOR

Present/Past Projects at NAWCAD

• Simulation Support (F-18, V-22, S-3, C-130, AH-1W)• Blade Element Modeling (AH-1W, CH-53, UH-1N, CH-47F,

SH-60R/S )• Trainer Model Development (AH-1W, F-14A/B, CH-53E, UH-

1N, C-130H2/T, CH-47F, SH-60R)• Flight Control Hardware Support (SAFCS, S-3, V-22, F-18,

EA-6B)• UAV Support (SAIC Fixed and R/W a/c, Hunter and Pioneer)• Handling Qualities Expert System Development• Flight Control IV&V• Systems Identification• Simulation Mechanical Design• Flight Test Support

Special Instrumentation Systems SIMES

1000 Hz Operation

High PerformanceData Acquisition

H/W Anti-aliasing

AnalogDigital and Video

Processing

Provided as product or a service to our customers

• SIMES is an instrumentation system specifically designed to measure simulator cueing systems and their fidelity.

• Measures bandwidth, transient performance, and time delays as well as compares predicted results to actual results for fidelity analysis.

• Motion system, cockpit controls and visual system

SIMES II and Simulator Interface

SIMES Independent Simulation Verification and Testing

Services

• Pre and Post-mod Testing for any separate sub-system or the total simulator. Useful for base-lining a simulator prior to an upgrade or mod.

• Acceptance Testing Support for both the fidelity of the simulator and the response of the cueing systems using FAA compliant tools for simulator and cueing system testing.

• Test Procedure Development for FAA and Military acceptance test procedures. This includes a test procedure library containing Trainer Testing Procedures Result Reports (TTPRRs), Auto Fidelity Tests and system latency procedures providing end to end automated testing.

• Sub-System Performance Analysis before purchase or installation, to assure the sub-system meets the performance specified by the manufacturer.

SIMES provides for real-time analysis ending the guess work and finger pointing between hardware and software. Isolates the sub-systems contributing to simulation problems including latency!

Technical Capabilities Electric Actuation Systems

• Custom Applications of High Force, High Bandwidth Electric Actuators– 1800 lbs / 120 Hz.

• Developed by SAIC– Sold Worldwide for Simulator Control

Loading Systemsby Simulation and Control Technologies, Inc.

• Multivariable Model Following Control Algorithm

• 3 Patents

Special Purpose Analysis Systems IDEAS

• IDEAS - Integrated Data Evaluation and Analysis System– A “High-End” Data Analysis and Simulation Tool– Expert System

IDEAS

Integrated Data Evaluation

and Analysis System

Data Archiving

Wild-Point Editing

Kinematic Consistency Analysis

Data Processing and

Reconstruction

Equation Error, Output Error,

and Filter Error System

Identification

Statistical and Math Routines

User Developed Routines

Data Display and Plot Utilities

On-line Help Utilities

Flight Test Data

Intuitive X-Window

Motif User Interface

Electronic Archive

C lp

Math Model

Improvement

Interface to

MATLAB,

CIFER and

other

analysis

tools

IDEAS - System Identification and Model Fidelity

Instrumentation System

x = F x + G u + L w y = H x + B u + b

Aircraft

Gust

CMDInput (u)

Measured Parameters

Test Vehicle

.

y - ys

Estimatesof System

Parameters

Iterative Process

SimulatedInstrumentation

SystemSimulated Aircraft

Gust

Simulated System

xs = Fs xs + Gs us + Ls wsys = Hs xs + Bs us + bs

.

Simulated Measured

Parameters

y

ys

System Identification Procedure

System Identification Optimization Algorithms

Simulation Before and After

After use of IDEAS

Improved Simulation Fidelity

Summary: Our Specialty-Simulation Model Fidelity

Systems Identification

Parameter Identification

Flight Test

0 5 10 15 20 25 30 35 40 45 50 55

0.1

0.0

-0.1

-0.2

-0.3

-0.4

-0.5

-0.6

angle-of-attack (deg)

C lp(per rad)

Prev. PIDFlight

Analyze the FlightData

Update the SimulationModel

10.9.8.7.6.5.4.3.2.1.0.

50.

40.

30.

20.

10.

0. 0

- 10.

- 20.

- 30.

- 40.

- 50.

TIMEsolid - PID dashed - Prev. dot-dash - Flight

P

DataAcquisition Simulate the

Flight Test

A Continuous Integrated

Process

IDEAS

SIMES

FCS Design and Development Cycle

Flight Test

GCS

Data Acquisition

Data archiving,analysis, reduction

Systems Identification

Equivalent system models

High-Fidelity Non-linear

Model

Control Law Development

Non-linear Control Law Implementation

Regression testing &

Acceptance

SWIL

HWILUpgraded

Control System

MATLAB/Simulink, Conduit, etc.IDEAS/CIFER

co l l

c 1 z _ o ut 0 0 0

C o lle c t iv e C m din c h e s + U PC o n t r o l, C 1 Z

L e a d- L a g1 .5 s

- - - - - - - - - - - - - - -( 1 .5 s+ 1 ) ( 0 .0 5 s+ 1 )

B L O C K : 5 1

K f f d

bc 1 c _ c o n 0 0 1

2 n d o r de r f ilt e r

c 1 e _ blk 0 5 1c 1 e _ p r d0 0 2

in /in

+ /- 2 .1 de g

c 1 e _ lim 0 0 0

in it

c 1 e _ lf i0 0 1

D A T A : c 1 e _ lf i0 0 1 _ da t a

L F I

IN O UT

9.8 5

11.0 1 5

12.3 2 5

c 1 e _ lf i0 0 1 _ da t aE q u iv T r q

E quiv a le n t T o r qe uep a r a m e t e r , G1 M

c 1 e _ in 0 0 2

T hrottl e F eed -F orw a rd C on trol

Flight Control Algorithms• Common architecture across all platforms• Layered control concept

N av ig a tio n & C o m m an d L im its

G u id an c e & E m er g en c y P r o c ed u r es

S tab ility au g m en ta tio n& E n v elo p e P r o tec tio n

K C ( s )

S en s o r s

Air c r af tK G ( s )K N ( s )

F lig h tP lanS tep

R em o teO p er a to r

lim its an d w ar n in g m es s ag es

Summary of SAIC Capabilities

• Heavy Simulation and Stimulation Support of NAWCAD, specializing in:– Physics based simulation modeling– Control system design and analysis– Flight test support

• Training simulator model development specialists –make the sim. fly like the a/c

• Systems developer for specialized simulation systems– SIMES -simulation instrumentation & testing– IDEAS – flight test and simulation analysis

• UAV Control Systems Development