Control of Orbiting Large Space Structural Systems with Discrete TimeObservational Data and Random Measurement Noise

摘要

The objective of this research is to develop practical design procedures that canbe used in conjunction with optimal digital controllers and estimators for future orbiting large space structural systems. In practice, observational data used to verify the orientation and shape of large flexible systems will, in general, be collected on a sampled basis (discrete time data system). Random noise is also included with such observational data. Systems which will be designed to control both the overall orientation as well as the shape of some of the subsystems (such as an antenna mesh form) must function in the discrete-time domain. The aim of this research is to develop methods that can be used to design linear quadratic Gaussian (LQG) controllers/ estimators for orbiting large flexible systems. The digital control of an orbiting shallow shell antenna-type system, as well as flexible platform-type systems are examined. Keywords: Digital control; Large space structures; Random measurement noise; Kalman filter. (edc)