Research On The Controlling Method Of PZT Actuators Used In Multi-dimension Micro Position Platform

Parallel 6 DOF platform is now wildly used in the fields of micro robot, micro mechanical, fiber communication, photoelectric, etal for it's advantages of high stiffness, good ability of taking load, excellent resolution of position, fast response and so on and up to now time, it mainly takes the form of Stewart structure or it's reforms for it's merits. In this paper, the author takes eyes on a novel 6 DOF platform model composed of 9 piezoceramics distributed specially between four plates and their deform caused by varying voltage controlled by external voltage source make contribution to the shift and turning round of platform in axis of x, y and z and the precise controlling on piezoceramics charactered as hysteresis is key to the controlling on platform.In the paper the next domains have been proposed:(1) Controlling means. Research on technologies of Preisach controlling model that widely researched and used in the field of PZT controlling, the communication between VB , Access database to fulfill the need of controlling on PZT and further programmed in for controlling process .(2) Feedback control. Analyzing and using the technology of PID on the base of feedback parameter gathered by means of sensor and makes it greatly improved in property of error and time consuming comparing to use of method of Soft Compensation.(3) Error feedback control. On the base of not considering the difference of every PZT, the whole error of system to every PZT referring to the matrix of system for further readjust of the controlling voltage for PZTS has been distributed.(4) Further research. Analyze on the PSD and external processing circuits and concerning experiment and further theoretical analyze for error control.Through the experiments on single PZT's and experiments on platform as whole concerning the Preisach model and PID controlling and based on the results we made the conclusion that the Preisach model is fit for the control for the PZT used in the system and PID technology can made contribution to the controlling process and makes it improved in the property of control.