【作者】 王汉杰；

【导师】 赵书尚； 李阁强；

【作者基本信息】 河南科技大学 ， 机械电子工程， 2011， 硕士

【摘要】 近年来,直驱式电液伺服系统引起了国内外的广泛重视。其基本原理是通过伺服电机或者变频电机和定量泵结合,通过控制电机的转向、转速及转矩,实现对系统的方向、位置及力控制。由于其在节能环保方面的突出优势在国外发展很快,已经在某些领域得到应用。我国对该研究起步较晚,还处在实验室阶段。本课题以压力机为应用背景,对直驱式电液伺服系统的理论和关键技术问题进行研究,无疑具有重要的理论意义和实际的应用价值。在查阅国内外大量相关文献基础上,综述了直驱式电液伺服系统的研究现状和应用情况,结合国内直驱式电液伺服系统的研究进展,确定了本文的主要研究方向。基于压力机的某一系统参数要求,对直驱式电液伺服系统的动力机构进行了设计计算;基于性能指标要求设计和选取了系统主要元件;采用一组插装式单向阀结合预压力密闭油箱解决液压闭式回路的无动力补油问题,并对其进行了设计;通过采用液压泵和集成阀块的一体化设计,并将其内置于密闭油箱的液压包结构形式,提高了闭式回路补油的可靠性,实现了系统的集成化。基于MATLAB和AMESim仿真分析平台,建立了包含无动力补油、安全及泄漏等环节在内的完整的直驱式电液伺服系统的半物理数学模型,仿真分析了主要参数对系统动态性能的影响;提出了前馈和反馈控制相结合、并辅以压力小闭环回路的复合控制策略,提高了系统的动态响应特性。针对系统复杂的电磁环境,进行了抗电磁干扰设计;编制了控制软件,实现了系统在线调试、控制功能;研制了直驱式电液伺服系统样机。搭建了试验台,对样机性能进行测试分析,给出了实验结果。通过和仿真分析对比,验证了理论分析的正确性。更多还原

【Abstract】 In recent years, Direct Drive Electro-Hydraulic Servo System has attracted widely attention at home and abroad. The basic principle is that servo motor or variable-frequency motor drives fixed displacement hydraulic pump, by controlling the motor’s direction of rotation, speed and torque, to realize the system’s direction, position and force control. Because of its prominence advantages in the energy-saving and environment-protective, it has been developed rapidly in foreign countries and applied in some areas. Our country begins lately start at the study, still at the laboratory stage. The subject making press for the application background, researching the system’s theoretical issues and key technology, will undoubtedly have Important theoretical significance and practical value.Based on lots of relevant materials at home and abroad about, this paper summarized research and application status, combined domestic progress of the system, identified the main research directions of the paper.The hydraulic motivity machine was designed based on one design parameter and performance target of press and selected the main components of the system. Initiative oil supply issue of closed circuit was solved by a set of screw-in cartridge check valves and pre-pressure closure oil tank contained PAF breather filter were used in the system.. Using the packet putting hydraulic pump and integrated valves block into the pre-pressure closure oil tank, improved the reliability of the oil supply of the closed loop and realized the system integration.On the MATLAB and AMESim simulation platform, built up the semi-physical and mathematical mode of the system contained initiative oil supply oil link, security link and leakage link. By simulating, analyzed the main system parameters’impact to dynamic performance. Proposed compound control scheme of feedback-plus-feed-forward and pressure closed-loop feed-forward, improved the system dynamic response characteristics. For the complex electromagnetic environment of system, designed anti-electromagnetic interference device. Authored control software, achieved system on-line debugging and control functions. Developed the sample machine of the system. Built test-bed of the system, tested and analyzed performance of sample machine, experiment results was given. By comparing analysis result and experiment results, we got that theoretical analysis is right.更多还原