摘要
综合考虑温度、预应力及碟簧非线性的影响,建立超磁致伸缩微致动器(giant magnetostrictive micro-actuator,简称GMA)车削加工系统非线性动力学微分方程。根据精确反馈线性化的滑模变结构控制方法设计控制器,采用双曲正切函数代替符号函数,并引进边界层,减少了系统的抖振,增加控制器的连续性。最后通过试验,验证了该控制方法的有效性,当系统存在外界干扰或是参数摄动时,该文设计的控制方法都能取得较好的控制效果,稳态误差达到纳米级。
A dynamic model of giant magnetostrictive micro-actuator(GMA)turning system is established while considering temperature,pre-stress,and the nonlinear influence of the disc spring.Firstly,the controller is designed based on exact feedback linearization,using a hyperbolic tangent function instead of sign function and sliding mode variable structure control.Moreover,in order to reduce chattering and increase the continuity of the controller,the boundary layer is introduced.Finally,the results of the experiment verify that the control method with changed temperature and outside interference is effective.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2014年第2期351-355,401,共5页
Journal of Vibration,Measurement & Diagnosis
基金
高等学校博士学科点专项科研基金资助项目(20090042110003
20120042120031)
关键词
超磁致伸缩微致动器
精密车削加工
精确反馈线性化
滑模变结构控制
抖振
giant magnetostrictive micro-actuator(GMA)
turning system
exact feedback linearization
sliding mode variable structure control
chattering
