Modern Adaptive Real-Time Controllers for Actively Reacting Flexible Structures.

Abstract

This paper describes modern controllers which are based on digital real-time filters, powerful adaptation algorithms and high speed signal processor systems. Such controllers are required for active shape and vibration control on large flexible space structures. Within the framework of the DLR program ARES (Actively Reacting Flexible Structures) - which is an attempt to develop systems capable of changing their characteristics in orbit in order to fulfil essential operational requirements, efforts are specially focused on adaptive signal processing. The hitherto achieved results are presented. The philosophy and capabilities of such controllers are demonstrated, referring to the process of adaptive system identification and inverse modeling. In addition, different types of filtering techniques and adaptation algorithms are theoretically and experimentally discussed concerning structural dynamic requirements.