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基于重复控制补偿的电液位置伺服系统分数阶PID控制

Keywords: 电液位置伺服,重复控制补偿,分数阶PID,Oustaloup滤波算法

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Abstract:

针对电液位置伺服系统参数时变和外负载干扰等不确定性,建立了电液位置伺服系统数学模型.为了提高电液位置伺服系统的跟踪精度,基于分数阶控制理论,引入重复控制回路,提出一种基于重复控制补偿的分数阶PID控制策略,采用Oustaloup滤波算法实现分数阶微积分运算.应用MATLAB/Simulink仿真软件对控制策略进行验证,分析了系统开环增益、伺服阀固有频率和阻尼比、动力机构固有频率和阻尼比等参数摄动时的跟踪效果.仿真结果表明:所提控制策略有效提高了电液位置伺服系统的跟踪精度,抗参数摄动能力较强,鲁棒性较好.

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