文章推荐 | 液压伺服作动系统力纷争敏感度及机理研究-文章

文章推荐 | 液压伺服作动系统力纷争敏感度及机理研究

运动控制 • 发布时间：2020年12月17日 16:24 • 收录时间：2020年12月17日 22:36 • 作者：测控技术 • 来源：微信公众号

中文摘要:

液压伺服作动系统存在的力纷争问题会引起作动系统性能下降、飞机舵面结构疲劳，影响飞机安全。为解决上述问题，建立了考虑较完整电液伺服阀模型以及飞机舵面结构参数的并联作动系统数学模型，提出了对液压伺服作动系统力纷争关键敏感参数及形成机理的研究方法。将潜在影响力纷争的因素整合为控制器参数、电液伺服阀参数、作动系统结构参数、气动力参数四类，并研究了各类参数变化对力纷争的影响。结果表明，控制器参数和电液伺服阀参数是影响力纷争的关键因素，此外，通过对伺服阀位移、作动器位移/速率和力纷争之间作用关系和影响模式的研究，找到控制器差异和伺服阀差异形成力纷争的不同机理。分析结果对液压伺服作动器的设计及力纷争的解决提供了理论依据。

英文摘要:

Force fighting among servo-hydraulic actuation systems may lead to performancedecrease of the actuator and fatigue of the aerodynamic surface structure,whichcan affect the safety of the aircraft.To solve the above problems,amathematical model of parallel actuation system considering the completeelectro-hydraulic servo valve model and the structural parameters of theaircrafts rudder surface is established,and methods toanalyze the key sensitivity parameters and mechanism of hydraulic servo systemare presented.Factors potentially influencing force fighting were integratedinto four categories,including controller parameters,electro-hydraulic servovalve parameters,actuation system structural parameters and aerodynamicloads.The study of the influences of the above factors on force fightingindicates that the parameters of controller and electro-hydraulic servo valvewere the key factors affecting force fighting.Furthermore,the influences ofmechanism differences between the controller and the servo valve's on forcefighting were found by studying the influence pattern of servo valvedisplacement and actuator displacement/rate on force fighting.The resultsprovide a theoretical basis for the design of hydraulic servo actuation systemand the resolution of force fighting.

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