Modeling and fuzzy logic control of a multi-degree-of-freedom reaction compensating system

This paper presents the development of a general purpose fuzzy logic (FL) control methodology for isolating external vibratory disturbances of space-based devices. The physical model used is a scaled-down two-plate reaction compensating platform system. According to the desired performance specifications, a full range of investigation regarding the development of an FL stabilization controller for the system is conducted. The performance of the FL controller is tested using different scenarios such as variances of passive reaction compensating components and external disturbance load. It is shown that the proposed FL controller is robust in that the resultant active system closely follows the performance of the prespecified ideal reference model. The comparative study of the performances of the FL controlled active reaction and noncontrolled passive reaction compensating systems also reveals that the FL controlled system achieves significant improvements in reducing vibrations over passive systems.