Modeling piezoelectric actuators
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TLDR
In this paper, an electromechanical piezo model based on physical principles is presented, where a first-order differential equation is adopted to describe the hysteresis effect, and a partial-differential equation is used to describe mechanical behavior.Abstract:
The piezoelectric actuator (PEA) is a well-known device for managing extremely small displacements in the range from 10 pm to 100 /spl mu/m. When developing a control system for a piezo-actuated positioning mechanism, the actuator dynamics have to be taken into account. An electromechanical piezo model, based on physical principles, is presented in this paper. In this model, a first-order differential equation is adopted to describe the hysteresis effect, and a partial differential equation is used to describe the mechanical behavior. Since, in practice, a PEA is most often used as an actuator for positioning mechanisms, we considered the influence of such a mechanism on the overall mechanical behavior of PEA and positioning mechanism together. For a well-designed mechanism, the overall mechanical behavior practically equals that of a single mass-spring-damper system, of which the undamped eigenfrequency and the relative damping can be designed favorably. With respect to traditional voltage steering, charge steering has the advantage that no hysteresis is encountered between electrical input and elongation. Electrical steering configurations for both cases of steering are presented. Finally, for the case of charge steering, we derived the total model of a piezo-actuated positioning mechanism. This model is dominated by the mechanical model, which could be designed favorably. Therefore, this model gives a broad range of possibilities for model-based controller design.read more
Citations
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References
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Journal ArticleDOI
Tracking control of a piezoceramic actuator
Ping Ge,Musa Jouaneh +1 more
TL;DR: The results show that the tracking control performance is greatly improved by augmenting the feedback loop with a model of hysteresis in the feedforward loop.
Journal ArticleDOI
Modeling piezoelectric stack actuators for control of micromanipulation
TL;DR: In this paper, a nonlinear lumped-parameter model of a piezoelectric stack actuator was developed to describe actuator behavior for purposes of control system analysis and design, and in particular for microrobotic applications requiring accurate position and/or force control.
Journal ArticleDOI
Modeling hysteresis in piezoceramic actuators
Ping Ge,Musa Jouaneh +1 more
TL;DR: In this article, the adaptation of the Preisach model was used to predict the response of a piezoceramic actuator to a sinusoidal input and a triangular input.
Journal ArticleDOI
Improving the linearity of piezoelectric ceramic actuators
C.V. Newcomb,I. Flinn +1 more
TL;DR: In this article, the linearity of a piezoelectric ceramic actuator may be improved if the applied electric charge, rather than the applied voltage, is varied to control the extension.
Journal ArticleDOI
A constitutive relation for rate-independent hysteresis in ferromagnetically soft materials
TL;DR: In this paper, the authors derived expressions for various curves of interest to experimenters; among these, the initial magnetization curve, hysteresis loops with specified extremal values of H, and the boundary of the accessible region of the (H, B)-plane.