A Theoretical Approach to Analysis and Design of Efficient Reduced Control for Space Structures
Final rept. Oct 1986-Oct 1990
OHIO STATE UNIV COLUMBUS DEPT OF AEROSPACE ENGINEERING
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The report develops concepts of efficiency for the control of structural dynamic systems. The efficiencies defined are unique nondimensional measures of structure control system performance forming a common basis of evaluation of such systems. Developments are presented both for distributed parameter systems and spatially discrete, typically finite element models of structural control systems are given by developing an efficiency modes analysis of controllers. The significance of relationship of controller efficiency modes to structural modes is studies. Based on these concepts, efficient model controller reduction approaches are developed. The efficiencies of systems with dynamic compensators including reduced order efficiency-state estimators are also developed. Illustrative examples based on the ACOSS-4 tetrahedral structure and the CSDL-ACOSS-6 Model 2 as typical large space structures, are given. The research establishes that efficiency of structural control systems is a fundamental concept that must be addressed in any structure control system design. The efficiency measures also establish the performance of -dimensional systems on the basis of finite dimensional control design models.
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