Foreign lunar soft - landing damping systems in the last years are analyzed and studied . according to the virtue of mrf , lunar soft - landing damping system based on mrf dampers is developed 在对近年来国外常用的登月软着陆缓冲系统进行分析研究后，针对磁流变液的优良特性，提出了磁流变阻尼器软着陆缓冲系统。
In addition , considering the distribution characteristics of the landing gear mentioned above , the equations used to calculate the forces of its stroke absorbers as well as its tires are presented in detail in the paper 同时,结合所研究的多轮多支柱起落架的布局特点,较为详细地介绍了该飞机的缓冲系统各分力和轮胎力的计算方法。
Also , compare many ways of simulation . in the course of establishing the mathematical models , the dynamics basic theory is applied . and three kinds of landing gear mathematical models are established 并且通过在simulink以及adams的仿真验证，比较各种仿真方法的仿真结果，得到了比较能够反映真实情况的三种起落架缓冲系统的数学模型。
The predigested calculating model about lunar soft - landing damping system is established in the course of landing shock . the dynamic computer simulation model is established according to the structure parameters 建立了磁流变阻尼器缓冲系统冲击时的简化模型，利用本文建立的动力学方程和所用阻尼器结构参数构建了动态仿真模型，并进行了计算机仿真。
Finally a design method that can analyze and optimize the shock - absorber performance of landing gear is given to us , by this way the parameter identification of shock - absorber with load and capability optimization of landing gear ' s system are integrated 在此基础上提出了一种飞机起落架缓冲性能分析、优化设计一体化方法，将缓冲系统参数识别、载荷优化与性能计算有机结合。
This paper begin with the concept system and system simulation , treat the landing gear as a system , use the concept of system simulation to establish the mathematical models of the landing gear , and to begin the simulation research 起落架软件平台的开发和应用在我国有着广阔的发展前景。本文的目地是以系统仿真的概念入手，将起落架缓冲系统进行动力学的数学建模和仿真建模。
Among them , as a compromise between active control and passive control , the controllability of semi - active control is access to full active control , and in the same time , the method is simpler , lighter and safer than full active control . it ' s suitable for the applications in landing gear shock absorbers 其中半主动控制介于被动控制和主动控制两者之间，具有类似主动控制的可控性，同时具有结构简单、重量轻、安全性高的特点，适合于在起落架缓冲系统中的应用。
In this paper , the mathematics model and simulation model of the passive landing gear shock absorber was built , and was verified by drop test . aimed at acquiring suitable efficiency diagrams , two simple semi - active control algorithms were designed . the mathematics model and simulation model of the semi - active landing gear shock absorber was built 在本文中，建立了被动控制起落架缓冲系统数学模型和仿真模型，并通过落震试验对该模型进行参数校验；以合适的功量图为控制目标设计出两种半主动简单控制律，建立了半主动控制起落架缓冲器数学模型和仿真模型；通过数字仿真对这两种控制方法进行了比较，认为半主动控制较被动控制有很大的优越性。
Chapter four first researches the structure design of computer control samrt cushioning system and the signal processing . then mainly studies the design of pid / pdf control algorithm and their parameters tuning . finally analyzes the basic characteristics of electropneumtic proportional / servo trace controlled system , especial study the influence of the valve dead zone , system friction and saturation phenomenon 第四章首先研究了计算机控制智能缓冲系统的结构设计、信号处理；然后重点研究了pid 、 pdf控制算法的设计及其参数整定；最后研究分析了控制系统的基本特性，着重分析了阀口死区、系统摩擦力和气路饱和特性等对系统控制性能的影响。
Now with the development of computer control technique applied in it , computer control technique has had a profound influence on pneumatic system structure / control performance / control theory etc . this thesis deeply researches on the task - computer control smart high - speed pneumatic cushioning system . which mainly includes the design of mechanical structure / electronical circuit / pneumatic loop and the researches of system modeling / simulation / control strategy 计算机控制技术和电-气比例伺服控制技术的结合，更是对控制系统的性能、系统的结构以及控制理论等多方面都产生了极为深刻的影响。本文对计算机控制智能高速气动缓冲系统进行了机械、电气、气路系统的设计以及系统建模方法、系统辨识研究和控制策略研究。
