Decentralized Control of a Large Space Structure as Applied to the CSDL 2 Model.
Abstract
Modern optimal control methods are used to develop a multiple, input multiple output controller which is applied to two models--CSDL 1 and CSDL 2. NASTRAN is employed to generate modal approximations of both models. Twelve selected modes are analyzed in both models. The control problem is formulated in state vector form and full state feedback is implemented. The state is represented as modal amplitudes and rates and the feedback gains are generated using steady state optimal regulator theory. State estimates are provided by means of a deterministic observer. System outputs are obtained by position sensors and control is applied by point force actuators. Control and observation spillover are eliminated using singular value decomposition. Decentralized control is accomplished using three and four controllers on both models. Conditions for which the stability of each model is asured are developed. On both models, there is a significant increase in the closed loop damping achieved. Losses in controllability and observability are noticed during spillover elimination. Full controller decoupling is achieved and stability is maintained. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1982
- Accession Number
- ADA124702
Entities
People
- Edward Sherman Aldridge
Organizations
- Air Force Institute of Technology