1 August 2003 Modeling and optimal control of microscale SMA actuators
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Abstract
The paper presents an optimal control approach to shape memory alloy (SMA) actuators. Like other active materials, e.g., piezoceramics or magnetostrictive materials, SMAs exhibit a highly non-linear and hysteretic behavior. In certain applications, in particular those with high driving frequencies like MEMS (Micro-Electro-Mechanical Systems) applications, this is known to lead to a breakdown of standard control algorithms. The optimal control approach overcomes this problem by including a model for the hysteretic behavior, and allows criteria like maximal speed and minimal energy consumption to be taken into account. To illustrate the potential benefits of the method, the performance is compared to that of a standard PI control.
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Olaf Heintze, Stefan Seelecke, Christof Bueskens, "Modeling and optimal control of microscale SMA actuators", Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); doi: 10.1117/12.484065; https://doi.org/10.1117/12.484065
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KEYWORDS
Shape memory alloys

Actuators

Control systems

Digital signal processing

Process control

Microelectromechanical systems

Computer simulations

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