Abstract
This article presents the application of the fuzzy logic (FL) concept to the active control of a multiple degree of freedom reaction compensating platform system that is designed and used for isolating vibratory dislllrbances of space-based devices. The physical model used is a scaled down two-plate platform system. In this work, simula tion is performed and presented. According to the desired pellormance specifications, afull range of investigation regarding the development of an FL stabilization control ler for the system is conducted. Specifically, the stlldy includes four stages: compre hensive dynamic modeling of the reaction compensating system; analysis of the dy namic responses of the platform system when it is sllbjected to various disturbances; design of an FL controller capable offiltering the vibratory disturbances transmitted to the bottom plate of the platform system; performance evaluation of the developed FL controller through computer simulations. To simplify the simulation lVork, the system model is linearized and the system component parameter variations are not considered. The performance of the FL controller is tested by exciting the system with an impulsive force applied at an arbitrarily chosen point on the top plate. It is shown that the proposed FL controller is robust in that the resllltant active system is well stabilized when subjected to a random external dislllrbance. The comparative study of the performances of the FL controlled active reaction and passive reaction compen sating systems also reveals that the FL controlled system achieves significant im provements in reducing vibratory accelerations over passive systems. © 1995 John Wiley & Sons, Inc.
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