复合式缓冲液压缸在电液负载模拟器中的应用  

Application of compound buffer hydraulic cylinder in electro-hydraulic load simulator(EHLS)

作　　者：刘晓琳 韩秋旻 李卓 Xiao-lin LIU;Qiu-min HAN;Zhuo LI(Key Laboratory for Advanced Signal Processing,Civil Aviation University of China,Tianjin 300300,China;College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300 [2]中国农业大学信息与电气工程学院,北京100083

出　　处：《机床与液压》2020年第24期27-32,56,共7页Machine Tool & Hydraulics

基　　金：天津市自然科学基金项目(17JCYBJC18200);中央高校基金项目(3122018C002);中国民航大学波音基金项目(20190621022)。

摘　　要：为解决飞机舵机电液负载模拟器在不同梯度加载实验中,由于舵机主动运动导致液压缸两腔产生强迫流量,进而产生多余力干扰的问题,提出基于复合式缓冲液压缸的系统结构设计。根据系统工作原理及液压缓冲结构特点,设计该液压缸的结构形式并建立其数学模型。采用AMESim仿真软件建立执行机构的仿真模型,并进行系统动态特性仿真实验。研究结果表明,该液压缸系统能够减小活塞运行过程中产生的机械碰撞,缓解液压缸两腔的强迫流量压力,抑制并消除多余力干扰,进而提高电液负载模拟器的负载性能,具有较高的工程实践价值。In order to solve the problem of the forced flow in two cavities of the hydraulic cylinder caused by the active motion of the rudder in different gradient loading experiments of aircraft rudder electro-hydraulic load simulator(EHLS),and then leads to surplus torque interference,thus the system structure design based on compound buffer hydraulic cylinder is proposed.For the working principle of the system and the characteristics of hydraulic buffer structure,the structure form of the hydraulic cylinder is designed and the mathematical model is established.The simulation model of the actuator is established through the AMESim simulation software,and the dynamic characteristic experiments are carried out.The results show that the hydraulic cylinder system can not only reduce the mechanical collision during the operation of the piston,and alleviate the forced flow pressure,but also suppress and eliminate the interference of surplus torque.In addition,the load performance of EHLS is improved with high engineering practice value.

关 键 词：电液负载模拟器 复合式缓冲液压缸 多余力 飞机舵机 负载性能 

分 类 号：TH137[机械工程—机械制造及自动化]