Hysteresis compensation control of a dielectric elastomer vibration isolator

Modeling of a magnetorheological elastomer-based isolator

A variable stiffness and damping isolator (VSDI) is designed and developed employing MREs. A double lap shear test has been carried out to characterize two MRE based VSDIs under quasi-static shear loading. A phenomenological model which can capture the behavior of the VSDI is developed and related parameters are identified using experimental data. Both experimental and theoretical modeling resu...

Modeling of a new semi-active/passive magnetorheological elastomer isolator

This paper presents theoretical modeling of a new magnetorheological elastomer (MRE) base isolator and its performance for vibration control. The elastomeric element of the traditional steel–rubber base isolator is modified to a composite layer of passive elastomer and MRE which makes the isolator controllable with respect to its stiffness and damping. The proposed variable stiffness and dampin...

Dielectric Elastomers Conductive Elastomer Insulating Elastomer

Hysteresis and Vibration Compensation in Piezoelectric Actuators by Integrating Charge Control and Inverse Feedforward

In this paper we address the problems of hysteresis and vibrations that limit the accuracy of piezoelectric positioners. It is widely known that the use of charge control significantly reduces hysteresis, thus enabling high-accuracy positioning during low speed operations. However, charge control is unable to reduce vibrations that limit the positioning bandwidth. Our main contribution is to ov...

Hysteresis, Creep, and Vibration Compensation for Piezoactuators: Feedback and Feedforward Control

We present an integrated two-step approach, which combines feedback and feedforward control, to compensate for the effects of hysteresis, creep, and vibration in piezoactuators. In this approach, the control of hysteresis and creep is decoupled from the control of vibrational dynamics. First, high-gain feedback control is used to minimize positioning error caused by hysteresis and creep. Second...