This Article Full Text (OnlineFirst PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Add to My Marked Citations Google Scholar Articles by Kuhnen, K. Social Bookmarking                   What's this?

Compensation of Parameter-Dependent Complex HystereticActuator Nonlinearities In Smart Material Systems

Saarland University, Laboratory of Process Automation (LPA), Building A5 1D-66041 Saarbrücken, Germany

^* To whom correspondence should be addressed.

	Abstract

In many mechatronic applications actuators which are based on activematerials are found and thus show a strong complex hysteretic output-input characteristic.A typical example is the hysteresis in actuators based on magnetostrictive materials.Unfortunately, especially in this case the hysteretic characteristic depends on a second inputparameter, the mechanical stress in the material, which affects strongly the form of thehysteretic curves. In the best case these undesired effects lead to a reduced system perfomanceand in the worst case to an unpredictable behavior of the superior control unit. Therefore, it isuseful and effective to linearize these nonlinearities by a compensator which is also able toconsider the dependence of the output on the second input. For this purpose this studydescribes the design of a compensator for parameter-dependent complex hystereticnonlinearities which are based on a new so-called threshold-discrete formulation of thePreisach hysteresis operator. Finally, some experimental results are presented, whichdocument the capability of the method for practical applications.

Key Words: hysteresis compensation, active material, parameter-dependent hysteresis, solid-state actuator

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?