Hysteresis and creep compensation for piezoelectric actuator in open-loop operation
Piezoelectric actuators are frequently used nowadays in a wide variety of positioning devices. However, a major deficiency of piezoelectric actuators is that their open-loop control accuracy is seriously limited by hysteresis and creep effects. This paper describes a method for simultaneous compensa...
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| Veröffentlicht in: | Sensors and actuators. A. Physical. 2005-07, Vol.122 (1), p.124-130 |
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| container_title | Sensors and actuators. A. Physical. |
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| creator | Changhai, Ru Lining, Sun |
| description | Piezoelectric actuators are frequently used nowadays in a wide variety of positioning devices. However, a major deficiency of piezoelectric actuators is that their open-loop control accuracy is seriously limited by hysteresis and creep effects. This paper describes a method for simultaneous compensation of the hysteresis and creep of piezoelectric actuator based on an inverse control in open-loop operation. The basis of the inverse control is formed by a hysteresis mathematical model and a creep model, which can describe precisely two phenomena. The method of solving inverse models of hysteresis and creep is described detailedly. Finally, a tracking control experiment of piezoelectric actuators for a desired trajectory is performed according to the proposed method and the experimental results demonstrate that the positioning precision is noticeably improved in open-loop operation compared to the conventional open-loop control without any compensation. |
| doi_str_mv | 10.1016/j.sna.2005.03.056 |
| format | Article |
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| subjects | Actuators Compensation Creep Creep (materials) Hysteresis Inverse Inverse control Mathematical analysis Mathematical models Piezoelectric actuator Piezoelectric actuators |
| title | Hysteresis and creep compensation for piezoelectric actuator in open-loop operation |
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