双喷嘴挡板伺服阀弹簧管刚度对伺服系统的影响分析

Analysis for Effect of Spring Tube on Servo Hydraulic Systems

对双喷嘴挡板伺服阀进行全面建模,分别从力矩马达、衔铁挡板组件、滑阀3个部件进行数学建模。力矩马达数学建模考虑了永磁体漏磁、导磁元件磁阻、永磁体磁阻及工作气隙因素;衔铁挡板组件模型考虑了其平动和转动两个自由度;而滑阀的数学建模采用常规建模方式。同时引入其他模型与所建立的模型通过AMESim仿真进行对比分析,并且逐步分析了弹簧管刚度对位置伺服系统和变幅伺服系统的影响。

In this study, a mathematic model of double nozzle flapper servo valve is introduced. This model in- cludes three parts： motor toque, armature baffle components and slide valve in the double nozzle flapper servo valve. For motor toque, the facts, including magnetic flux leakage and reluctance of permanent magnets, reluc- tance of magnetic components and working air gaps, are considered. Two DOFs （ translation and rotation） of the ar- mature baffle components are considered while an ordinary model is adopted for slide valves. Also, the impacts that the spring tube on the synergic movement position system and amplitude swing system are discussed by using and comparing with two different AMESim models.