External Force and Displacement Estimation for Self-sensing Control of a Piezoelectric Actuator
Piezoelectric actuators(PEAs)are commonly used as micro-positioning devices due to their high resolution,high stiffness and fast frequency response.Positioning precision can be significantly reduced due to nonlinear hysteresis effects when PEAs are used in relatively long range applications.Innovative model-based controllers for PEAs have recently been developed to overcome this issue.These controllers generally assume that the external force is zero or constant,which is a satisfactory assumption when the dynamic mechanical load on the piezoelectric actuator is very low.However,new applications of PEAs have emerged,in which the dynamic mechanical load cannot be neglected.In this paper,a model of PEA is proposed,that includes a new asymmetric hysteresis operator and that takes the external force into account.A detection model is deduced,which allows to compute in real time the PEA elongation and generated force starting from the measurement of the driving voltage and current.This detection model is used to replace displacement/force sensor for closed-loop displacement/force control of a PEA.Experiments are carried out using a two PEAs experimental setup.The first actuator is the controlled actuator,and the second one is used as a dynamic controllable mechanical load.
Piezoelectric actuator tracking control self-sensing detection model
A. Badel J. Qiu T. Nakano
Institute of Fluid Science,Tohoku University,Japan College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,China Honda Automobile R&D Center,Tochigi,Japan
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）