【作者】 钟柱；

【导师】 程靳；

【作者基本信息】 哈尔滨工业大学 ， 固体力学， 2010， 硕士

【摘要】 伺服作动分系统是飞行控制系统中必不可少的组成部分,作为执行机构,它按照计算机指令驱动舵面实现对飞机的控制。伺服作动分系统的性能直接影响飞机飞行控制系统的性能。本论文以某型号飞机飞行控制系统中的往复式液压作动器为研究对象,针对其存在的漏液问题,以研究密封件故障为切入点,充分运用计算机仿真技术,采用多学科交叉对故障的影响因素和成因机理进行系统的研究。本文的主要研究工作如下:首先,对液压作动器在工作过程可能出现的故障现象进行了系统分析并建立了故障树,确定出了存在漏液问题的主要故障现象,进而运用有限元软件ANSYS对密封圈的结构性能进行了系统的分析,给出了各种因素对密封性能的影响规律,为密封装置可靠性分析和故障预测提供理论依据。其次,根据大变形物体的有限元分析原理、计算多体动力学基本原理及接触力计算原理,通过运用有限元分析软件ANSYS及机械动力学分析软件ADAMS联合建模的方法,建立了具有非理想约束的作动器虚拟样机仿真模型,实现了对液压作动器的动态性能进行各种因素的综合仿真分析。最后,利用液压伺服作动器的虚拟样机平台,对影响密封装置密封性能的零件加工误差和运动配副的装配误差等因素进行了较为系统地分析,并给出了相应变化规律和影响趋势,为设计高可靠性液压作动器提供有效的理论分析依据。更多还原

【Abstract】 Servo actuator subsystem is essential for the flight control system components, as the implementing agency, which follows the computer order-driven control surfaces to achieve controlling the aircraft. The performance of the Servo actuator subsystem directly affects the aircraft flight control system.In this paper, it mainly research on a type of aircraft flight control system in the reciprocating servo actuators, for its leakage problems, the entry point is the failure of seals, using of computer simulation technology and interdisciplinary fully, meanwhile, using many interdisciplines to systematically study in the factors and causes of failure mechanism. The main research works are as follows:First, we systematically analyzed the hitch phenomenon maybe appear when hydraulic actuator is working, meanwhile created a fault tree, and identified the main fault phenomenon of leakage problems, then analysised the structural properties of ring Systematically with the finite element software ANSYS, given affect law of the various factors on the performance, and it offer a theory foundation for the reliability analysis and fault prediction of the sealing device.Secondly, according to the principle of finite element analysis with large deformation of objects, the basic principles of calculating multi-body dynamics and contact forcing calculation principle, using the co-modeling method with the finite element analysis software ANSYS and mechanical dynamic analysis software ADAMS, built a actuator prototype simulation model with non-ideal constrained, and realized integrated simulation analysis on the hydraulic actuator dynamic performance with various factorsFinally, by the hydraulic servo actuator of the virtual prototype platform, and had a more systematically analysis on the spares machining error and assembly error of join space which are the influence factors in sealing performance of sealing device. And given a corresponding changing law and a impact of trends, it provide theoretical analysis effectively for designing a higher reliability hydraulic actuators.更多还原