Active vibration control of space antenna reflector over wide temperature range

In this study, the dynamic response and the active vibration control behavior of large space antenna reflector is investigated numerically over wide temperature range (−70 °C to 120 °C). A space antenna reflector of composite material integrated with collocated piezoelectric ceramic PZT-5H was studied for effective vibration amplitude reduction. For the numerical simulations, finite element formulation is employed. The nonlinear fuzzy logic controller is designed as single input–single output (SISO) system using 49 If-Then rules and implemented numerically to perform active vibration control. The results are presented in time domain and frequency domain. The numerical results show that even moderate fluctuations in temperature under study can considerably influence the performance of piezoelectric ceramics used as sensors and actuators resulting in degraded performance for active vibration control. The fuzzy logic controller can effectively attenuate the structural vibrations at both high and low temperature.