摘要
针对率相关迟滞特性对压电陶瓷作动器的影响,研究了基于最小二乘支持向量机的内模控制策略。首先采用最小二乘支持向量机对压电陶瓷作动器进行动态建模,然后得到了基于最小二乘支持向量机的系统逆模型。在此基础上设计了内模控制器以实现对压电陶瓷作动器的精密控制。最后,通过构建的压电陶瓷作动器实验平台进行了实验,完成了对模型和控制方法的验证。实验结果表明,采用所设计的内模控制策略跟踪100 Hz以内的单一频率或复合频率信号时,各个频率的相对误差均在10%以下,验证了该控制策略的有效性。
Aiming at the influence of rate-dependent hysteresis characteristics on piezoelectric ceramic actuators,an internal model control strategy based on least squares support vector machines is studied.Firstly,the least square support vector machine is used to dynamically model the piezoelectric ceramic actuator,and then the system inverse model based on the least square support vector machine is obtained.On this basis,an internal model controller is designed to achieve precise control of piezoelectric ceramic actuators.Finally,experiments were conducted through the constructed piezoelectric ceramic actuator experimental platform,and the verification of the model and control method was completed.Experimental results show that when the designed internal model control scheme is used to track single frequency or composite frequency signals within 100 Hz,the relative error of each frequency is below 10%,which verifies the effectiveness of the control strategy.
作者
尚爱鹏
王贞艳
贺一丹
SHANG Aipeng;WANG Zhenyan;HE Yidan(School of Electronical and Information Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2020年第9期1254-1258,共5页
Chinese Journal of Sensors and Actuators
基金
山西省研究生教改项目(2019JG165)
山西省基础研究计划项目(自然)(201901D111263)。
关键词
压电陶瓷作动器
迟滞
最小二乘支持向量机
内模控制
piezoelectric actuator
hysteresis
least squares support vector machine
internal model control
