新型直驱式电液伺服飞行模拟器单通道驱动装置研究
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摘要
飞行模拟器是飞行员飞行训练、飞行器开发设计的重要工具,可以大大节省训练和设计成本,同时又具有安全性、可靠性、真实性等特点。液压驱动方式由于响应快、出力大,目前已成为飞行模拟器最主要的驱动方式。直驱式电液伺服系统具有结构简单、节能环保、控制灵活的优点,受到越来越多的关注,一些国家已将直驱式电液伺服系统应用于飞行模拟器平台。
     论文针对飞行模拟器所采用的液压驱动装置,研究探索了一种新型直驱式电液伺服系统,其应用于立式负载系统中,能有效平衡恒定外力的作用,节能效果明显;系统使用双联泵控制非对称缸,使泵控非称缸正反向运动特性相似,改善了控制性能;液压蓄能器的使用,使系统补油迅速,压力建立快,提高了系统的响应速度和频宽。
     论文介绍了新型直驱式电液伺服系统的工作原理,分析了其节能效果,并与普通直驱式电液伺服系统对照分析了其性能、特点。按照飞行模拟器的性能指标要求,设计制造了新型直驱式电液伺服系统的实验样机,将系统中主要部件集成在阀块中,大大简化了系统结构;建立了新型直驱式电液伺服系统的数学模型,分析各项参数对系统性能的影响,并进行了仿真研究;以C++Builder为开发工具开发编写了系统控制程序;在空载和加载情况下分别对系统进行了实验研究,并对实验中出现的一些实验现象做出了分析和解释。实验结果表明系统响应快,频响高,满足飞行模拟器驱动装置的性能指标要求,并较普通直驱式电液伺服系统的性能有较大提高。
The flight simulator is an important tool for pilot training, aircraft development and design, which can greatly reduce the training and design cost, and also it has the characteristic of security, reliability, authenticity and so on. Hydraulic drive has become the main driving mode of a flight simulator because of the characteristics of fast response and large output. Direct drive volume control electro-hydraulic servo system is attracting more and more attention for its advantages of simple structure, energy-saving, environmental protection, and flexible control. It has been applied in the flight simulator platform in some countries.
     This paper aimed at hydraulic driving device of flight simulator, studied and explored a new direct drive electro-hydraulic servo system, which could balance out the effects of constant external force effectively and save energy efficiently when applied to the vertical load system; This system improves the control performance effectively since the non-asymmetric cylinder is controlled by a twin pump so that it obtains similar motion characteristics either it moves forward or back. The use of hydraulic accumulators, make it quicker for oil filling and pressure build, improved the system's response speed and bandwidth.
     This paper introduced the principle of the new direct drive electro-hydraulic servo system, analyzed the energy-saving effect and its performance and characteristics compare with the common direct drive electro-hydraulic servo system. In accordance with the performance requirements of a flight simulator, a test prototype of the new type of direct drive servo system has been designed and manufactured, the main components the prototype were integrated in the valve block, so that the system structure was greatly simplified. Built mathematical model of the new type of direct drive electro-hydraulic servo system, analyzed the impact of various parameters to the system performance, and did some simulation studies. Developed a system control program by means of C + + Builder. Did experimental study both with and without load, and made some analysis and interpretation to the phenomena appeared in the experiment. Experimental results show that that the system has the characteristics of fast response, high frequency response, meets the performance requirements of the flight simulator driving device, and the performance has been greatly improved compared with common direct drive electro-hydraulic servo system.
引文
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