Title

Self-Organizing Spacecraft Attitude Control

Date

1965

Index Abstract

Coming Soon

Photo Quality

Complete

Report Number

AFFDL TR 65-141

Creator

Barron, Roger L.

Schalkowsky, Samuel

Davies, John M.

Snyder, Richard F.

Corporate Author

Adaptronics, Inc.

Laboratory

Air Force Flight Dynamics Laboratory

Extent

128

NTRL Accession Number

AD475167

Identifier

AD0475167

Access Rights

Export Controls

Distribution Classification

1

Contract

AF 33(615)-1864

DoD Project

8225

DoD Task

822508

DTIC Record Exists

No

Distribution Change Authority Correspondence

AFFDL LTR

Abstract

Results are presented from an investigation of self-organizing attitude control and stabilization for spacecraft. Self-organizing (SOC) control is achieved through high-speed assessments of performance values of successive random experiments with respect to a generalized control criterion, followed by a reward-punishment reinforcement process to obtain on-line synthesis of plant actuation signals. The logic is of the Probability State Variable (PSV) type, i.e., reinforcement signals are used to bias the probabilities associated with the SOC experiments. Convergence of SOC output signals to appropriate, time-varying levels generally occurs within several milliseconds, resulting in rapid, well damped, stable control over a very wide range of controller, plant, and disturbance characteristics (including induced artificial failures). A laboratory experimental self-organizing controller has been fabricated. Evaluations of this SOC have been conducted using single-axis analog computer simulations of a representative orbital vehicle. Compared to a conventional controller for this vehicle, the SOC produced superior transient and comparable steady-state performance. The SOC adapted to a range of plant characteristics over which the conventional controller did not provide uniformly satisfactory performance.

Report Availability

Full text available

Date Issued

1965-09

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource