基于LuGre模型的飞机助力器极限环振荡仿真研究  

Study on Limit Cycles Oscillations of Aircraft Hydraulic Booster Based on LuGre Model

作　　者：李永林[1] 沈燕良[1] 李小涛[1] 张建邦[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《系统仿真学报》2007年第23期5529-5532,共4页Journal of System Simulation

摘　　要：通过对控制阀采用非线性LuGre摩擦模型,建立了助力器反馈装置的动力学模型,进而得到助力器操纵系统的非线性模型。以某型飞机液压助力器为研究对象,进行了数值仿真计算,验证了在特定条件下助力器的极限环现象。分析了助力器主要的结构参数对极限环振荡的影响,仿真结果表明较小的控制阀阀口面积梯度,较小的反馈比对助力器抑制极限环振荡有较大作用。The model of control valve was established based on non-linear LuGre friction model, and the dynamic model of feedback device for hydraulic booster was established. The non-linear model of hydraulic booster could be obtained. The limit cycles oscillations phenomenon of hydraulic booster was emerged under specified conditions through the simulation test for an aircraft hydraulic booster. And the effects of different structural parameters on limit cycles oscillations were analyzed. The simulation results show that less area gradient of valve port and reaction coefficient of hydraulic booster are both effective to abate limit cycles oscillations of hydraulic booster.

关 键 词：飞机助力器 非线性摩擦 LUGRE模型 极限环振荡 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]