Dynamic characteristics and tracking precision are studied in the photoelectric tracking system and a linear active disturbance rejection control( LADRC) scheme is proposed for position loop. A current and speed contr...Dynamic characteristics and tracking precision are studied in the photoelectric tracking system and a linear active disturbance rejection control( LADRC) scheme is proposed for position loop. A current and speed controller is designed by a transfer function model,which is obtained by adaptive differential evolution. Model error,friction and nonlinear factor existing in position loop are treated as ‘disturbance',which is estimated and compensated by generalized proportional integral( GPI)observer. Comparative results are provided to demonstrate the remarkable performance of the proposed method. It turns out that the proposed scheme is successful and has superior features,such as quick dynamic response,low overshoot and high tracking precision. Furthermore,with the proposed method,friction is suppressed effectively.展开更多
为了提高统一电能质量调节器(Unified Power Quality Conditioner,UPQC)的经济性和实用性,提出一种改进型UPQC拓扑结构,该结构可在保证电能补偿效果的基础上,可大幅降低对变流器补偿容量和公共直流侧电压等级的要求.通过分析UPQC补偿原...为了提高统一电能质量调节器(Unified Power Quality Conditioner,UPQC)的经济性和实用性,提出一种改进型UPQC拓扑结构,该结构可在保证电能补偿效果的基础上,可大幅降低对变流器补偿容量和公共直流侧电压等级的要求.通过分析UPQC补偿原理和建立数学模型,对其串联变流器和并联变流器分别进行控制.为加快系统能量收敛,利用注入阻尼的方法,设计了串联变流器电流内环无源控制器,电压外环使用了自抗扰比例积分控制,增强了系统的抗扰动能力,以实现对电网侧畸变电压的补偿;并联变流器采用双闭环控制,与无源滤波器共同完成对负载谐波电流的补偿.最后在Matlab/Simulink环境下仿真,结果验证了所提拓扑结构和控制策略的可行性.展开更多
基金Supported by the National High Technology Research and Development Programme of China(No.2015AA8082065)the National Natural Science Foundation of China(No.61205143)
文摘Dynamic characteristics and tracking precision are studied in the photoelectric tracking system and a linear active disturbance rejection control( LADRC) scheme is proposed for position loop. A current and speed controller is designed by a transfer function model,which is obtained by adaptive differential evolution. Model error,friction and nonlinear factor existing in position loop are treated as ‘disturbance',which is estimated and compensated by generalized proportional integral( GPI)observer. Comparative results are provided to demonstrate the remarkable performance of the proposed method. It turns out that the proposed scheme is successful and has superior features,such as quick dynamic response,low overshoot and high tracking precision. Furthermore,with the proposed method,friction is suppressed effectively.
文摘为了提高统一电能质量调节器(Unified Power Quality Conditioner,UPQC)的经济性和实用性,提出一种改进型UPQC拓扑结构,该结构可在保证电能补偿效果的基础上,可大幅降低对变流器补偿容量和公共直流侧电压等级的要求.通过分析UPQC补偿原理和建立数学模型,对其串联变流器和并联变流器分别进行控制.为加快系统能量收敛,利用注入阻尼的方法,设计了串联变流器电流内环无源控制器,电压外环使用了自抗扰比例积分控制,增强了系统的抗扰动能力,以实现对电网侧畸变电压的补偿;并联变流器采用双闭环控制,与无源滤波器共同完成对负载谐波电流的补偿.最后在Matlab/Simulink环境下仿真,结果验证了所提拓扑结构和控制策略的可行性.