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基于开关液压源的大惯性负载速度与力控制系统研究
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摘要
本论文主要研究高速开关液压马达的实现。旨在解决由开关液压源负载特性差异带来的一系列问题,为开关液压源在实用化和产业化道路上的发展推进一大步。首先,论文从多执行器复合控制系统节能的角度出发,分析了传统的各类液压传动系统的优缺点,并重点介绍了本世纪初提出的新型液压节能系统—开关液压源理论。接着论文给出了高速开关马达的理论支持,研究了高速开关马达的元件特性,并用试验来验证结构的合理性。
     第一章从多执行器复合控制系统节能的角度出发,分析了各类液压传动系统的优缺点,并着重介绍了本世纪最新提出的新型节能型液压传动系统——开关液压源。提出了论文研究的目的、内容和意义。
     第二章提出一种适用于多执行器复合控制系统中对驱动大惯性负载的液压马达的速度进行控制的新型节能型电液控制系统——高速开关液压马达,针对其大惯性负载马达联执行器的驱动控制,引入开关液压源理论,构成一个半闭式液压回路,实现了输出转矩与负载的自动适应,大幅度提高能量的转换效率。在此基础上,提出相应的脉频调制速度控制方法,并进行了理论分析和试验研究。
     第三章对高速开关液压马达的各元件:高速开关阀、高速单向阀、液感元件和系统的管路进行建模和特性分析,并将第二章中的高速开关液压马达的理论进行实际化,从理论分析的角度给出合理的元件参数选择以进行仿真验证。
     第四章对高速开关液压马达的各元件:高速开关阀、高速单向阀、液感元件和系统的管路进行功耗分析。
     第五章说明试验结果,并给出结论。
     第六章对本论文所做的研究工作作了简要的总结。
This thesis mainly deals with High-speed Switch-mode Hydraulic Power Motor. The objective of research is to solve a series of problems companied with the difference of load characteristics in Switch-mode Hydraulic Power Supply and to make more progress in the way of its practicability and industrialization. First, based upon energy-saving effect of multi-performer compounded control, thesis analyzes the advantages and disadvantages of traditional hydraulic systems and lays the emphasis on the new energy-saving hydraulic system - Switch-mode Hydraulic Power Supply, which was put forward early this century. Second, thesis lays the solid foundation in theoretical field for High-speed Switch-mode Hydraulic Power Motor, and studies characteristics of components and the whole hydraulic system. Finally, after rigorous theoretical analysis on load automatically adaptive principle, thesis approaches the optimum tracing control principle.
    The first chapter is concerned with the energy-saving effect of multi-performer compounded control. Based on the analyses of advantages and disadvantages of traditional hydraulic systems, thesis puts forward the new energy-saving hydraulic system - Switch-mode Hydraulic Power Supply. After the introduction in detail about its buck structure, general description about the background, purpose, prospective and research contents of the thesis is given.
    The second chapter focuses research on a new type of energy saving electro hydraulic control system-High-speed Switch-mode Hydraulic Power Motor~for multiple actuator compounded control. Switch-mode hydraulic power supplies are applied in the driving and control of the hydraulic motors with high inertia loads, a semi close loop circuit is constructed and its output torque could adapt the load automatically. Energy converting efficiency is increased considerably. Based on these, correspondent plus frequency modulated velocity control method is put forward.
    The third chapter builds mathematical model and analyzes the dynamic characteristics of all the hydraulic components including high-speed switch valve, high-speed check valve, hydraulic inductance, and hydraulic pipeline. For better" explanation of their principles, this chapter analyzes specific characteristics of experiment system.
    The fourth chapter analyzes expend of all the hydraulic components including
    
    
    high-speed switch valve, high-speed check valve, hydraulic inductance, and hydraulic pipeline.
    The fifth chapter shows the experiments and draws a conclusion.
    The sixth chapter gives a brief generalization about all the research work this thesis concerns with.
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