摘要
采用模糊控制策略,开展介电弹性作动器的主动隔振性能试验研究。基于介电弹性材料的Maxwell应力模型建立了作动器的力电耦合模型,分析了作动器的非线性特性;针对隔振系统设计了Mamdani型模糊控制器,建立了控制电压信号与振动响应之间的关系;在此基础上,开展了介电弹性作动器主动隔振试验研究,并与加速度反馈控制进行了对比。试验结果表明,在相同驱动电压的情况下,基于模糊控制策略的主动隔振性能要优于加速度反馈控制,且能够显著降低由于非线性驱动力导致的倍频响应幅值,有助于提高隔振系统的稳定性。
A fuzzy logic algorithm is employed in the active vibration isolation with dielectric elastomer actuator.Based on the Maxwell stress model of dielectric elastic material,the electromechanical coupling model of the actuator is established,and the nonlinear characteristics of the actuator are analyzed.A Mamdani-type fuzzy logic algorithm is designed for the vibration isolation system,and the relationship between control voltage signal and vibration response is established.The experimental study of active vibration isolation based on the fuzzy logic algorithm is carried out and compared with acceleration feedback control.The experimental results show that the performance of active vibration isolation based on fuzzy control strategy is better than that of acceleration feedback control under the same driving voltage,and the doubled-frequency response amplitude caused by nonlinear driving force can be significantly reduced,which is helpful to improve the stability of vibration isolation system.
作者
毛伯永
翟兴辉
谢石林
苏健军
Mao Boyong;Zhai Xinghui;Xie Shilin;Su Jianjun(State Key Library for Strength and Vibration of Mechanical Structures,School of Aerospace,Xi’an Jiaotong University,710049,Xi’an,China;Xi’an Modern Chemistry Research Institute,710065,Xi’an,China;Shanghai Institute of Spaceflight Control Technology,201109,Shanghai,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2020年第1期25-31,I0002,共8页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(11872290)
国家自然科学联合基金(U1430129)
关键词
模糊控制
主动隔振
介电弹性作动器
隔振性能
fuzzy control
active vibration isolation
dielectric elastomer actuator
vibration isolation performance
