Self-Tuning Fuzzy PID Based Position Control of Stack Piezoelectric Actuator for High Precision Applications
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Date
2019-10
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Addis Ababa University
Abstract
In the area of micro and nano-scale systems, the piezoelectric actuator (PEA) has become an
increasingly popular candidate as a precise actuator. But control problems associated with
system uncertainties and system inherent nonlinearities remain big challenges for control
engineers. In this paper stack PEA is modeled with hysteresis effect using rate independent
hysteresis in order to increase precision. The hysteresis is linearized using Gaussian stochastic
linearization technique and self-tuning fuzzy PID controller is designed in this paper. The
system response of the system is compared with traditional PID controller. The self-tuning
fuzzy PID controller perform better than the traditional PID controller with different
conditions. The comparison included parameter variations, external disturbance rejection and
delay time.
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Keywords
Stack PEA, hysteresis, linearization, PID controller, self-tuning FPID controller