基于GMA喷嘴挡板伺服阀的动态特性  

DYNAMIC CHARACTERISTICS OF NOZZLE FLAPPER SERVO VALVE BASED ON GMA

作　　者：王传礼[1] 丁凡[1] 崔剑[1] 李其朋[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027

出　　处：《机械工程学报》2006年第10期23-26,36,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(59835160);安徽省教育厅自然科学基金(2003kj109)资助项目。

摘　　要：提出基于GMA喷嘴挡板伺服阀的新结构,研制了GMM电-机械转换器及其喷嘴挡板伺服阀,分析其结构特点与需要解决的关键技术,建立动态数学模型。构建基于GMA喷嘴挡板伺服阀动态特性的试验系统,试验研究GMA喷嘴挡板伺服阀的阶跃和幅频响应特性,试验测得其阶跃响应上升时间为1 ms、幅频宽达680 Hz;将试验结果与仿真结果进行对比分析,两者基本吻合,论证动态数学模型的正确性。研究结果表明,用GMM设计新型电-机械转换器,可提高喷嘴挡板阀乃至整个电液伺服系统的频响和精度。The structure and principle of the GMM actuator and the new nozzle flapper servo valve with GMA are presented; its features and key techniques such as temperature compensation, pre-pressure exertion and bias magnetic excitation are discussed, and the dynamic mathematic model is established; the measuring system is built to test its dynamic characteristics, and experiments are carried out on the step response and amplitude frequency response of theflapper-nozzle servo valve based on GMA. It is shown that its rising time is about 1 ms, and its frequency response can reach 680 Hz （-3 dB）. The experimental results agree well with the simulation, which proves the correctness of the mathematical model. And the results show that the new electromechanical converter based on GMM, which can take the place of traditional converters like torque motor, can enhance the response and precision of electrohydraulic servo valve.

关 键 词：超磁致伸缩 电-机械转换器 喷嘴挡板伺服阀 动态特性 仿真与试验 

分 类 号：TH137.5[机械工程—机械制造及自动化]