一种磁流变弹性体执行器的联合优化方法研究

A joint optimization method for magnetorheological elastomer actuator

磁流变弹性体(magnetorheological elastomer,MRE)执行器作为智能减振应用系统的核心元件,其结构的优化是决定执行器性能上限及系统控制成效的关键。针对目前MRE执行器优化方法及理论研究欠缺的问题,文中面向一款横向隔振的MRE执行器,基于其机械结构和有效磁路,以优越磁控性能、低功耗和快速响应时间为优化目标,提出了一种新的MRE执行器联合参数优化方法。首先,基于MATLAB和COMSOL的联合仿真,将遗传优化算法和电磁有限元分析方法进行有效结合,实现对MRE执行器的优化编程;其次,完成对器件的全局尺寸结构优化设计,使得器件具备优越磁控性能(526.21 mT)、低功耗(44.05 W)及快速响应(5.43 ms);最后,通过搭建测试系统对优化后装配的MRE执行器进行测试和评估,验证了文中优化方法的可行性和有效性。提出的联合优化方法不仅适用于MRE执行器结构,还可为多领域减/隔振应用的共性MRE器件优化设计提供理论参考。

Magnetorheological elastomer(MRE)actuator is the core component of smart vibration isolation application system,and its structure optimization is the key to determining the upper limit of actuator's performance and the effectiveness of system's control.However,there have been few optimization methods and theoretical research on MRE actuators.In this paper,a new joint parameter optimization method of an MRE actuator is proposed based on its mechanical structure and effective magnetic circuit,with the optimization goals of superior magnetic-control performance,low power consumption and fast response time.Firstly,with the effective combination of genetic optimization algorithm and electromagnetic finite element analysis method,the optimization programming of MRE actuator is completed based on the joint simulation of MATLAB and COMSOL.Secondly,the optimization design of global size structure of the actuator is realized with the advantages of superior magnetic-control performance(526.21 mT),low power consumption(44.05 W)and fast response(5.43 ms).Lastly,the MRE actuator assembled after optimization is tested by a test system,verifying the feasibility and effectiveness of the proposed optimization method.The proposed joint optimization method is not only suitable for the structure of MRE actuator in this paper,but also can provide theoretical reference for the optimization design of common MRE devices in multi-field vibration reduction/isolation applications.