In this paper, an output-feedback tracking controller is proposed for a class of nonlinear non-minimum phase systems.To keep the unstable internal dynamics bounded, the method of output redefinition is applied to let ...In this paper, an output-feedback tracking controller is proposed for a class of nonlinear non-minimum phase systems.To keep the unstable internal dynamics bounded, the method of output redefinition is applied to let the stability of the internal dynamics depend on that of redefined output, thus we only need to consider the new external dynamics rather than internal dynamics in the process of designing control law. To overcome the explosion of complexity problem in traditional backstepping design, the dynamic surface control(DSC) method is firstly used to deal with the problem of tracking control for the nonlinear non-minimum phase systems. The proposed outputfeedback DSC controller not only forces the system output to asymptotically track the desired trajectory, but also drives the unstable internal dynamics to follow its corresponding bounded and causal ideal internal dynamics, which is solved via stable system center method. Simulation results illustrate the validity of the proposed output-feedback DSC controller.展开更多
现代控制论与控制实际之间存在一些"鸿沟",根据PID (Proportional-integral-derivative)控制器具有良好抗扰性的事实,提出了一种基于PID的二阶内反馈控制器(Second order of internal feedback controller, SO-IFC).基于在新...现代控制论与控制实际之间存在一些"鸿沟",根据PID (Proportional-integral-derivative)控制器具有良好抗扰性的事实,提出了一种基于PID的二阶内反馈控制器(Second order of internal feedback controller, SO-IFC).基于在新型"高效"滤波方法上的一些进展,将一种新型正弦跟踪滤波方法 (New sinusoid tracking filter, NSTF)运用于SO-IFC控制回路的噪声干扰滤波.针对被控对象的准确数学模型难以获取的问题,将一种根据过程增益(Process gain, PG)和过程总滞后(Process all lag, PAL)的工程参数整定方法 (Engineering parameter tuning method, EPTM)运用于SO-IFC参数的整定,降低了SO-IFC参数整定的难度.将SO-IFC运用于大滞后过程的控制,具有良好的控制性能包括良好的扰动抑制性能.数学分析、仿真实验和实际应用的结果验证了文中所提出观点和方法的正确性和有效性.展开更多
In order to address the output feedback issue for linear discrete-time systems, this work suggests a brand-new adaptive dynamic programming(ADP) technique based on the internal model principle(IMP). The proposed metho...In order to address the output feedback issue for linear discrete-time systems, this work suggests a brand-new adaptive dynamic programming(ADP) technique based on the internal model principle(IMP). The proposed method, termed as IMP-ADP, does not require complete state feedback-merely the measurement of input and output data. More specifically, based on the IMP, the output control problem can first be converted into a stabilization problem. We then design an observer to reproduce the full state of the system by measuring the inputs and outputs. Moreover, this technique includes both a policy iteration algorithm and a value iteration algorithm to determine the optimal feedback gain without using a dynamic system model. It is important that with this concept one does not need to solve the regulator equation. Finally, this control method was tested on an inverter system of grid-connected LCLs to demonstrate that the proposed method provides the desired performance in terms of both tracking and disturbance rejection.展开更多
为了进一步提高调相机缺陷识别能力,设计了一种基于TCN网络的调相机局部放电智能检测方法。在调相机设备上开展了干扰测试,构建能够满足现场调相机内局部放电检测系统。研究结果表明:设计相位反馈控制能够对低于1.8 k Hz低频噪声造成相...为了进一步提高调相机缺陷识别能力,设计了一种基于TCN网络的调相机局部放电智能检测方法。在调相机设备上开展了干扰测试,构建能够满足现场调相机内局部放电检测系统。研究结果表明:设计相位反馈控制能够对低于1.8 k Hz低频噪声造成相位衰落起到明显抑制效果。调相机局部放电检测试验结果显示,10 s时间内,Michelson光纤干涉系统对内部缺陷信号达到了精确检测的效果,PZT传感器则没有检测出内部缺陷的信号。展开更多
基金supported by National Natural Science Foundation of China(61403013)the Aero-Science Foundation of China(2015ZA51009)
文摘In this paper, an output-feedback tracking controller is proposed for a class of nonlinear non-minimum phase systems.To keep the unstable internal dynamics bounded, the method of output redefinition is applied to let the stability of the internal dynamics depend on that of redefined output, thus we only need to consider the new external dynamics rather than internal dynamics in the process of designing control law. To overcome the explosion of complexity problem in traditional backstepping design, the dynamic surface control(DSC) method is firstly used to deal with the problem of tracking control for the nonlinear non-minimum phase systems. The proposed outputfeedback DSC controller not only forces the system output to asymptotically track the desired trajectory, but also drives the unstable internal dynamics to follow its corresponding bounded and causal ideal internal dynamics, which is solved via stable system center method. Simulation results illustrate the validity of the proposed output-feedback DSC controller.
文摘现代控制论与控制实际之间存在一些"鸿沟",根据PID (Proportional-integral-derivative)控制器具有良好抗扰性的事实,提出了一种基于PID的二阶内反馈控制器(Second order of internal feedback controller, SO-IFC).基于在新型"高效"滤波方法上的一些进展,将一种新型正弦跟踪滤波方法 (New sinusoid tracking filter, NSTF)运用于SO-IFC控制回路的噪声干扰滤波.针对被控对象的准确数学模型难以获取的问题,将一种根据过程增益(Process gain, PG)和过程总滞后(Process all lag, PAL)的工程参数整定方法 (Engineering parameter tuning method, EPTM)运用于SO-IFC参数的整定,降低了SO-IFC参数整定的难度.将SO-IFC运用于大滞后过程的控制,具有良好的控制性能包括良好的扰动抑制性能.数学分析、仿真实验和实际应用的结果验证了文中所提出观点和方法的正确性和有效性.
基金supported by the National Science Fund for Distinguished Young Scholars (62225303)the Fundamental Research Funds for the Central Universities (buctrc202201)+1 种基金China Scholarship Council,and High Performance Computing PlatformCollege of Information Science and Technology,Beijing University of Chemical Technology。
文摘In order to address the output feedback issue for linear discrete-time systems, this work suggests a brand-new adaptive dynamic programming(ADP) technique based on the internal model principle(IMP). The proposed method, termed as IMP-ADP, does not require complete state feedback-merely the measurement of input and output data. More specifically, based on the IMP, the output control problem can first be converted into a stabilization problem. We then design an observer to reproduce the full state of the system by measuring the inputs and outputs. Moreover, this technique includes both a policy iteration algorithm and a value iteration algorithm to determine the optimal feedback gain without using a dynamic system model. It is important that with this concept one does not need to solve the regulator equation. Finally, this control method was tested on an inverter system of grid-connected LCLs to demonstrate that the proposed method provides the desired performance in terms of both tracking and disturbance rejection.
文摘为了进一步提高调相机缺陷识别能力,设计了一种基于TCN网络的调相机局部放电智能检测方法。在调相机设备上开展了干扰测试,构建能够满足现场调相机内局部放电检测系统。研究结果表明:设计相位反馈控制能够对低于1.8 k Hz低频噪声造成相位衰落起到明显抑制效果。调相机局部放电检测试验结果显示,10 s时间内,Michelson光纤干涉系统对内部缺陷信号达到了精确检测的效果,PZT传感器则没有检测出内部缺陷的信号。
