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generalized-prandtl-ishlinskii-model
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Precise position control of shape memory alloy actuator using inverse hysteresis model and model reference adaptive control system
, Article Mechatronics ; Volume 23, Issue 8 , December , 2013 , Pages 1150-1162 ; 09574158 (ISSN) ; Sayyaadi, H ; Sharif University of Technology
2013
Abstract
Position control of Shape Memory Alloy (SMA) actuators has been a challenging topic during the last years due to their nonlinearities in the governing physical equations as well as their hysteresis behaviors. Using the inverse of phenomenological hysteresis model in order to compensate the input-output hysteresis behavior of these actuators shows the effectiveness of this approach. In this paper, in order to control the tip deflection of a large deformation flexible beam actuated by an SMA actuator wire, a feedforward-feedback controller is proposed. The feedforward part of the proposed control system, maps the beam deflection into SMA temperature, is based on the inverse of the generalized...
Position control of shape memory alloy actuator based on the generalized Prandtl-Ishlinskii inverse model
, Article Mechatronics ; Volume 22, Issue 7 , 2012 , Pages 945-957 ; 09574158 (ISSN) ; Zakerzadeh, M. R ; Sharif University of Technology
2012
Abstract
Hysteresis and significant nonlinearities in the behavior of Shape Memory Alloy (SMA) actuators encumber effective utilization of these actuator. Due to these effects, the position control of SMA actuators has been a great challenge in recent years. Literature review of the research conducted in this area shows that using the inverse of the phenomenological hysteresis models can compensate the hysteresis of these actuators effectively. But, inverting some of these models, such as Preisach model, is numerically a complex task. However, the generalized Prandtl-Ishlinskii model is analytically invertible, and therefore can be implemented conveniently as a feedforward controller for compensating...