A two-staged membrane separation process for hydrogen recovery from refinery gases is introduced. The principle of the gas membrane separation process and the influence of the operation temperatures are analyzed. As t...A two-staged membrane separation process for hydrogen recovery from refinery gases is introduced. The principle of the gas membrane separation process and the influence of the operation temperatures are analyzed. As the conventional PID controller is difficult to make the operation temperatures steady, a fuzzy self-tuning PID control algorithm is proposed. The application shows that the algorithm is effective, the operation temperatures of both stages can be controlled steadily, and the operation flexibility and adaptability of the hydrogen recovery unit are enhanced with safety. This study lays a foundation to optimize the control of the membrane separation process and thus ensure the membrane performance.展开更多
针对开关磁阻电机PID(Proportional Integral Derivative)控制中存在的稳定性差、参数调节困难等问题,文中基于传统开关磁阻电机PID调速系统引入鲸鱼优化算法,将改进时间绝对误差函数作为适应度函数对K_(p)、K_(i)、K_(d)这3个控制参数...针对开关磁阻电机PID(Proportional Integral Derivative)控制中存在的稳定性差、参数调节困难等问题,文中基于传统开关磁阻电机PID调速系统引入鲸鱼优化算法,将改进时间绝对误差函数作为适应度函数对K_(p)、K_(i)、K_(d)这3个控制参数进行整定。在MATLAB/Simulink仿真平台搭建了三相6/4极开关磁阻电机的PID参数整定系统,分析了传统经验PID调参和算法整定参数的效果对比,并将鲸鱼算法的优化效果与粒子群算法、遗传算法和灰狼优化算法结果进行对比。仿真结果表明,所提方法获得的PID参数较精确,其效果优于3种对比算法。相比于经验法整定参数,鲸鱼算法整定参数响应速度提升了51.10%,误差减小了0.67%,使调速系统具有更快、更稳定的响应特性。展开更多
温度控制在生产生活中发挥着举足轻重的作用。位式控制算法在调节具有滞后性的水暖床垫温度控制系统时容易导致温度在目标值上下波动,控制效果不理想。为了解决此问题,设计了一种基于位置式PID的水暖床垫温度控制系统,系统以51内核的微...温度控制在生产生活中发挥着举足轻重的作用。位式控制算法在调节具有滞后性的水暖床垫温度控制系统时容易导致温度在目标值上下波动,控制效果不理想。为了解决此问题,设计了一种基于位置式PID的水暖床垫温度控制系统,系统以51内核的微处理器为核心控制器、以负温度系数热敏电阻(Negative Temperature Coefficient,NTC)为温度传感器、以PTC为加热器、以直流电机作为循环水泵。经实际测试结果表明,该系统运行稳定,控温精度在±0.5℃以内,达到了理想的温度控制效果。展开更多
文摘A two-staged membrane separation process for hydrogen recovery from refinery gases is introduced. The principle of the gas membrane separation process and the influence of the operation temperatures are analyzed. As the conventional PID controller is difficult to make the operation temperatures steady, a fuzzy self-tuning PID control algorithm is proposed. The application shows that the algorithm is effective, the operation temperatures of both stages can be controlled steadily, and the operation flexibility and adaptability of the hydrogen recovery unit are enhanced with safety. This study lays a foundation to optimize the control of the membrane separation process and thus ensure the membrane performance.
文摘针对开关磁阻电机PID(Proportional Integral Derivative)控制中存在的稳定性差、参数调节困难等问题,文中基于传统开关磁阻电机PID调速系统引入鲸鱼优化算法,将改进时间绝对误差函数作为适应度函数对K_(p)、K_(i)、K_(d)这3个控制参数进行整定。在MATLAB/Simulink仿真平台搭建了三相6/4极开关磁阻电机的PID参数整定系统,分析了传统经验PID调参和算法整定参数的效果对比,并将鲸鱼算法的优化效果与粒子群算法、遗传算法和灰狼优化算法结果进行对比。仿真结果表明,所提方法获得的PID参数较精确,其效果优于3种对比算法。相比于经验法整定参数,鲸鱼算法整定参数响应速度提升了51.10%,误差减小了0.67%,使调速系统具有更快、更稳定的响应特性。
文摘温度控制在生产生活中发挥着举足轻重的作用。位式控制算法在调节具有滞后性的水暖床垫温度控制系统时容易导致温度在目标值上下波动,控制效果不理想。为了解决此问题,设计了一种基于位置式PID的水暖床垫温度控制系统,系统以51内核的微处理器为核心控制器、以负温度系数热敏电阻(Negative Temperature Coefficient,NTC)为温度传感器、以PTC为加热器、以直流电机作为循环水泵。经实际测试结果表明,该系统运行稳定,控温精度在±0.5℃以内,达到了理想的温度控制效果。
