High precise control method for a new type of Piezoelectric electro-hydraulic servo valve

来源 :Journal of Central South University of Technology | 被引量 : 0次 | 上传用户:jinxiangjinshu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A new type of piezoelectric electro-hydraulic servo valve system was proposed. And then multilayer piezoelectric actuator based on new piezoelectric ceramic material was used as the electricity-machine converter of the proposed piezoelectric electro-hydraulic servo valve. The proposed piezoelectric electro-hydraulic servo valve has ascendant performance compared with conventional ones. But the system is of high nonlinearity and uncertainty, it cannot achieve favorable control performance by conventional control method. To develop an efficient way to control piezoelectric electro-hydraulic servo valve system, a high-precise fuzzy control method with hysteresis nonlinear model in feedforward loop was proposed. The control method is separated into two parts: a feedforward loop with Preisach hysteresis nonlinear model and a feedback loop with high-precise fuzzy control. Experimental results show that the hysteresis loop and the maximum output hysteresis by the PID control method are 4.22% and 2.11 μm, respectively; the hysteresis loop and the maximum output hysteresis by the proposed control method respectively are 0.74% and 0.37 μm, respectively; the maximum tracking error by the PID control method for sine wave reference signal is about 5.02%, the maximum tracking error by the proposed control method for sine wave reference signal is about 0.85%. A new type of piezoelectric electro-hydraulic servo valve system was proposed. And then piezoelectric actuator based on new piezoelectric ceramic material was used as the electricity-machine converter of the proposed piezoelectric electro-hydraulic servo valve. But the system is of high nonlinearity and uncertainty, it can not achieve favorable control performance by conventional control method. To develop an efficient way to control piezoelectric electro-hydraulic servo valve system, a high-precise fuzzy control method with hysteresis nonlinear model in feedforward loop was proposed. The control method is separated into two parts: a feedforward loop with Preisach hysteresis nonlinear model and a feedback loop with high-precise fuzzy control. Experimental results show that the hysteresis loop and the maximum output hysteresis by the PID control method are 4.22% and 2.11 μm, respectively; the hysteresis loop and the maximum output hysteresis by the proposed control method are 0.74% and 0.37 μm, respectively; the maximum tracking error by the PID control method for sine wave reference signal is about 5.02%, the maximum tracking error by the proposed control method for sine wave reference signal is about 0.85%.
其他文献
A method of three-dimensional limited slope stability analysis is presented here based on the upperbound theorem of the limit analysis approach.A rotating colla
一、粮食政策执行中出现的新问题时至世际之末,我国农业生产形势发生了令人始料不及的变化,许多农副产品出现了“过剩”的表象。尤其是粮食生产,当国家还在为平抑粮价、刺激粮食
目的观察不同时间给予己酮可可碱(pentoxifylline,PTX)对新生大鼠缺氧缺血性脑损伤(hypoxic-ischemic brain damage,HIBD)模型的影响。方法建立新生大鼠HIBD模型,120只出生7
专利内容专利号专利持有者用于检测条纹病抗性水稻的寡核苷酸和利用该种寡核苷酸5783395日本HokkaidoNational检测条纹病抗性水稻的方法。AgriculturalEquipmentStation从悬沟子基因组两个不同启动子区分离出来的、用... Patent
2004年匆匆过去,客车行业在外人看来或许波澜不惊,但业内方知其厮杀惨烈。为争夺更大的生存空间,上至行业排名第一的郑州宇通,下至地方厂家诸如盐城中大,价格战的呼声此起彼
1971年12月23日,一个寒冷的冬日,对许多人来说不过是普通得不能再普通的日子了。可对X基地的人们来说,却是刻骨铭心的。他们牢牢记住这一天,并不是因为它的寒冷,而是在这一天——
当今世界己进入信息化时代,信息技术是经济发展和社会进步的战略资源,信息化水平已成为衡量一个国家综合国力的重要标志。为了培植新的经济增长点和抢占国际竞争的制高点,并为下
本刊讯 为表彰奖励在我国安全生产科学技术进步工作中做出突出贡献的单位和个人,调动科技工作者的积极性和创造性,国家安全生产监督管理局、国家煤矿安全监察局(以 In order to
正所谓“理越辨越明”。通过讨论,不仅能让学生在困惑和争鸣中获得自己独特的见解和体会,形成自己的逻辑,与真理无限接近,而且还能同时让学生获得情感上的体验和道德价值观上
本文根据径流农业和水土保持综合治理的基本原理,以及对辽宁西部陡坡地资源的调查研究,介绍了陡坡地集流聚肥梯田的内涵、集流机理、集流效果及其优化设计参数的确定 Based on