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The inherent rate-dependent hysteresis in smart actuators hinders their wider applicability in practical engineeering. In this paper, based on the rate-dependent Hammerstein model, a 2 DOF control scheme with a robust controller combined with a hysteresis compensator is proposed for tracking control of smart actuators. The hysteresis compensator is first connected in cascade with an actuator to cancel...
Hysteresis nonlinearity, which is an inherent characteristic of piezoelectric actuators (PEAs), decreases the tracking precision and may even result in limit cycle oscillations. A tracking control based on H∞ robust disturbance observer (DOB) is presented for PEAs in this paper. Hammerstein system is applied to modeling dynamic hysteresis nonlinearity of PEA. Then, a control scheme that combines H...
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