基于无超调算法的双步进电机伺服阀控制研究  

Electrohydraulic linear actuator with two stepping motors controlled by overshoot-free algorithm

作　　者：孟淑丽[1] 郝雷[2] MENG Shuli;HAO Lei(School of Engineering and Technology,Beijing Institute of Economics and Management,Beijing 102602,China;School of Electronic and Information Engineering,Hebei University,Baoding 071002,Hebei,China)

机构地区：[1]北京经济管理职业学院工程技术学院,北京102602 [2]河北大学电子信息工程学院,河北保定071002

出　　处：《中国工程机械学报》2020年第2期153-158,共6页Chinese Journal of Construction Machinery

基　　金：河北省自然科学基金资助项目(B2014201008);河北省高等学校科学技术研究资助项目(Z2015147)。

摘　　要：采用单步进电机或永磁同步电机作为电液伺服阀电-机械转换器的方案,存在瞬态响应慢、定位精度低、耐油液污染能力差的缺点,对此,提出一种采用双步进电机作为阀芯驱动力的无超调算法控制的新型电液伺服阀。通过联轴器、丝杠将两个步进电机分别与阀芯直接连接,依据双步进电机的电液伺服阀结构,构建电液伺服控制系统,采用无超调控制算法调节步进电机的输出频率,实现对活塞运动的精确控制。对系统进行仿真模拟与实验测试,结果显示:仿真结果与实验结果吻合度较高,采用无超调算法后,活塞杆位移几乎无超调,稳定时间比未采用该算法快0.35 s。说明本文构建的双步进电机电液伺服阀控制系统的可行性,以及通过无超调算法可以有效地减小输出冲击,获得更快的瞬态响应和更高的定位精度。For the electromechanical transducers of electro-hydraulic spool valves,single stepping motor or permanent magnet synchronous motors driving transducers are often used,but they have such disadvantages as slow transient response,relatively bad positioning accuracy and bad hydraulic pollution resistance.In this paper,a new type of electro-hydraulic servo valve is presented,which is controlled by a non-overshoot algorithm using a double-stepping motor as the driving force of the spool.Two stepper motors are directly connected to the spool through coupling and lead screw,and an electro-hydraulic servo control system is constructed according to the electro-hydraulic servo valve structure of the double-stepper motor.The output frequency of stepping motor is adjusted by non-overshoot control algorithm to realize accurate control of piston motion.The system is simulated and tested experimentally.The simulation result has shown that the simulation results are in good agreement with the experimental results.After adopting the non-overshoot algorithm,the piston rod displacement has almost no overshoot,and the stabilization time is 0.35 s faster than that without the algorithm.It shows the feasibility of the two-step electromechanical hydraulic servo valve control system constructed in this paper,and that the output shock can be effectively reduced by using the non-overshoot algorithm,so as to obtain faster transient response and higher positioning accuracy.

关 键 词：双步进电机 伺服阀 无超调算法 活塞 

分 类 号：TM383.6[电气工程—电机]