1. Ultra-high speed positioning control of a gravure engraving unit using a discrete-time two-degree-of-freedom H∞ control
- Author
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Yoshihiro Taniguchi, Mitsuo Hirata, Hideaki Ogawa, Kenzo Nonami, and Donghao Tang
- Subjects
Engineering ,Automatic control ,business.industry ,Applied Mathematics ,Feed forward ,Control engineering ,Plant ,Piezoelectricity ,Computer Science Applications ,Nonlinear system ,Control and Systems Engineering ,Control theory ,Digital control ,Electrical and Electronic Engineering ,Actuator ,business - Abstract
The piezoelectric actuator has high-speed response in comparison with the electro-magnetic actuator. However, it is not easy to achieve both high-speed and high-precision response by feedforward control only because the piezoelectric element has nonlinear properties such as the hysteresis effect. Thus, feedback control is required to achieve good performance. In this paper, we develop a new control design method to achieve both high-speed and high-precision response for piezoelectric actuators using the discrete-time H ∞ control method and the two-degree-of-freedom control scheme. The effectiveness of our proposed method has been shown by the simulation and experimental results. The most important contribution of our study is that our method can be directly applied to commercial machines.
- Published
- 2002