A novel control scheme of active disturbance rejection internal model control(ADRIMC) is proposed to improve the anti-interference ability and robustness for the dead-time process. The active anti-interference concept...A novel control scheme of active disturbance rejection internal model control(ADRIMC) is proposed to improve the anti-interference ability and robustness for the dead-time process. The active anti-interference concept is introduced into the internal model control(IMC) by analyzing the relationship between IMC and disturbance observer control(DOB). Further, a design process of disturbance filter is presented to realize the active anti-interference ability for ADRIMC scheme. The disturbance filter is used to estimate an equivalent disturbance consisting of both external disturbances and internal disturbances caused by model mismatches.Simulation results demonstrate that the proposed method possesses a good disturbance rejection performance, though losing some partial dynamic performance. In other words, the proposed method shows a tradeoff between the dynamic performance and the system robust.展开更多
An adaptive internal mode control is proposed to eliminate effectively periodic disturbance with uncertain frequency caused by input error angle of PIGA （Pendulous Integrating Gyro Accelerometer）. An adaptive algori...An adaptive internal mode control is proposed to eliminate effectively periodic disturbance with uncertain frequency caused by input error angle of PIGA （Pendulous Integrating Gyro Accelerometer）. An adaptive algorithm with periodic disturbance frequency identification on line is applied and the internal model controller parameters are adjusted to eliminate disturbance. Then the convergence of this algorithm and the stability of the system are proved by the averaging method. Simulation results verify the proposed scheme can eliminate periodic disturbance and improve the test precision for PIGA effectively.展开更多
针对永磁无刷直流电机调速系统提出了一种改进的内模PI(Internal model control PI,IMC-PI)控制方法。根据内模控制原理设计出PI控制器,引入一种作用函数,将其与PI控制器串联构成改进的IMC-PI控制器。作用函数为偏差的微分表达式,其阶...针对永磁无刷直流电机调速系统提出了一种改进的内模PI(Internal model control PI,IMC-PI)控制方法。根据内模控制原理设计出PI控制器,引入一种作用函数,将其与PI控制器串联构成改进的IMC-PI控制器。作用函数为偏差的微分表达式,其阶次的选择应保证系统开环传递函数严格真实。改进IMC-PI控制可使系统的调节过程分为作用函数趋近零和保持为零的两个阶段,从而保证系统偏差按照作用函数等于零确定的轨迹趋近于零。仿真和实验结果表明方法可有效提高控制系统的性能。展开更多
The motivation of this work is to obtain single PI/PID tuning formula for different types of processes with enhanced disturbance rejection performance. The proposed tuning formula consistently gives better performance...The motivation of this work is to obtain single PI/PID tuning formula for different types of processes with enhanced disturbance rejection performance. The proposed tuning formula consistently gives better performance in comparison to several well-known methods at the same degree of robustness for stable, integrating and unstable processes. For the selection of the closed-loop time constant(τc), a guideline is provided over a broad range of time-delay/time-constant ratios on the basis of the peak of maximum sensitivity(Ms). An analysis has been performed for the uncertainty margin with the different process parameters for the robust controller design. It gives the guideline of the Ms-value settings for the PI controller designs based on the process parameters uncertainty. Furthermore, a relationship has been developed between Ms-value and uncertainty margin with the different process parameters(k, τ and θ). Simulation study has been conducted for the broad class of processes and the controllers are tuned to have the same degree of robustness by measuring the maximum sensitivity, Ms, in order to obtain a reasonable comparison.展开更多
内模控制(internal model control,IMC)因其结构简单、易于实现已得到广泛关注,但其控制性能与滤波器时间常数有直接关系,影响了其在高性能变频调速系统中的应用。该文提出了一种采用免疫算法的感应电机内模控制策略,以免疫应答系统为基...内模控制(internal model control,IMC)因其结构简单、易于实现已得到广泛关注,但其控制性能与滤波器时间常数有直接关系,影响了其在高性能变频调速系统中的应用。该文提出了一种采用免疫算法的感应电机内模控制策略,以免疫应答系统为基础,引入一种免疫算法,分析了该算法的实现方式。将该免疫算法植入到内模控制器中,实现对滤波时间常数的在线调整,克服了内模控制器因滤波时间常数固定带来的系统动态性能不佳的问题。仿真与实验结果验证了采用免疫算法的感应电机内模控制策略的有效性。展开更多
基金Project(61273132)supported by the National Natural Foundation of ChinaProject(20110010010)supported by Higher School Specialized Research Fund for the Doctoral Program,China
文摘A novel control scheme of active disturbance rejection internal model control(ADRIMC) is proposed to improve the anti-interference ability and robustness for the dead-time process. The active anti-interference concept is introduced into the internal model control(IMC) by analyzing the relationship between IMC and disturbance observer control(DOB). Further, a design process of disturbance filter is presented to realize the active anti-interference ability for ADRIMC scheme. The disturbance filter is used to estimate an equivalent disturbance consisting of both external disturbances and internal disturbances caused by model mismatches.Simulation results demonstrate that the proposed method possesses a good disturbance rejection performance, though losing some partial dynamic performance. In other words, the proposed method shows a tradeoff between the dynamic performance and the system robust.
文摘An adaptive internal mode control is proposed to eliminate effectively periodic disturbance with uncertain frequency caused by input error angle of PIGA （Pendulous Integrating Gyro Accelerometer）. An adaptive algorithm with periodic disturbance frequency identification on line is applied and the internal model controller parameters are adjusted to eliminate disturbance. Then the convergence of this algorithm and the stability of the system are proved by the averaging method. Simulation results verify the proposed scheme can eliminate periodic disturbance and improve the test precision for PIGA effectively.
文摘针对永磁无刷直流电机调速系统提出了一种改进的内模PI(Internal model control PI,IMC-PI)控制方法。根据内模控制原理设计出PI控制器,引入一种作用函数,将其与PI控制器串联构成改进的IMC-PI控制器。作用函数为偏差的微分表达式,其阶次的选择应保证系统开环传递函数严格真实。改进IMC-PI控制可使系统的调节过程分为作用函数趋近零和保持为零的两个阶段,从而保证系统偏差按照作用函数等于零确定的轨迹趋近于零。仿真和实验结果表明方法可有效提高控制系统的性能。
基金the support provided by King Abdulaziz City for Science and Technology (KACST) through the "KACST Annual Program" at King Fahd University of Petroleum & Minerals (KFUPM) for funding this work through project number AT-32-41
文摘The motivation of this work is to obtain single PI/PID tuning formula for different types of processes with enhanced disturbance rejection performance. The proposed tuning formula consistently gives better performance in comparison to several well-known methods at the same degree of robustness for stable, integrating and unstable processes. For the selection of the closed-loop time constant(τc), a guideline is provided over a broad range of time-delay/time-constant ratios on the basis of the peak of maximum sensitivity(Ms). An analysis has been performed for the uncertainty margin with the different process parameters for the robust controller design. It gives the guideline of the Ms-value settings for the PI controller designs based on the process parameters uncertainty. Furthermore, a relationship has been developed between Ms-value and uncertainty margin with the different process parameters(k, τ and θ). Simulation study has been conducted for the broad class of processes and the controllers are tuned to have the same degree of robustness by measuring the maximum sensitivity, Ms, in order to obtain a reasonable comparison.
文摘内模控制(internal model control,IMC)因其结构简单、易于实现已得到广泛关注,但其控制性能与滤波器时间常数有直接关系,影响了其在高性能变频调速系统中的应用。该文提出了一种采用免疫算法的感应电机内模控制策略,以免疫应答系统为基础,引入一种免疫算法,分析了该算法的实现方式。将该免疫算法植入到内模控制器中,实现对滤波时间常数的在线调整,克服了内模控制器因滤波时间常数固定带来的系统动态性能不佳的问题。仿真与实验结果验证了采用免疫算法的感应电机内模控制策略的有效性。
