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电液伺服系统的模糊自适应复合控制研究
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四川省高校重点实验开放课题项目(szjj2017-015);成都市科技局技术创新研发项目(2019-YFYF-00079-SN);四川航天技术研究院青年创新基金资助项目(研JSYF-QY-2003)


Research on Fuzzy Adaptive Compound Control of Electro-hydraulic Servo System
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    摘要:

    电液位置伺服系统的阻尼比较低,造成电液位置伺服系统响应速度慢及跟踪性能较差。为解决此问题,提出一种模糊自适应控制与速度正反馈、加速度负反馈相结合的复合控制策略。通过速度正反馈来提高系统的开环增益,加速度负反馈提高阻尼比,从而提高系统动态响应速度并减小位置误差。利用前馈控制拓宽系统频宽,进一步减小位置跟踪误差。对传统PI控制、模糊PI控制、模糊PI复合控制算法下的系统响应性能进行仿真分析,结果表明:采用所提出的复合控制策略时,系统动态响应速度比模糊PI控制提高约76.9%,比传统PI控制提高约84.2%,其位置跟踪误差几乎为0。

    Abstract:

    The damping of the electrohydraulic position servo system is relatively low, resulting in slow response speed and poor tracking performance of the electrohydraulic position servo system. In order to solve this problem, a compound control strategy combining fuzzy adaptive control with positive speed feedback and negative acceleration feedback was proposed. The open loop gain of the system was improved through positive speed feedback, and the damping ratio was improved through negative acceleration feedback, so the dynamic response speed of the system was improved and the position error was reduced. The feedforward control was used to broaden the system bandwidth and further reduce the position tracking error. The system response performance under the traditional PI control, fuzzy PI control, and fuzzy PI compound control algorithm were simulated and analyzed. The results show that when the proposed compound control strategy is adopted, the system dynamic response speed is improved about by 76.9% compared with fuzzy PI control and 84.2% compared with traditional PI control, and its position tracking error is almost zero.

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神英淇,曹太强,司国雷,王嘉磊,王静.电液伺服系统的模糊自适应复合控制研究[J].机床与液压,2021,49(19):38-42.
SHEN Yingqi, CAO Taiqiang, SI Guolei, WANG Jialei, WANG Jing. Research on Fuzzy Adaptive Compound Control of Electro-hydraulic Servo System[J]. Machine Tool & Hydraulics,2021,49(19):38-42

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  • 在线发布日期: 2023-03-21
  • 出版日期: 2021-10-15