Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor(PMSM). An adaptive extended state observer(AESO) is pro...Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor(PMSM). An adaptive extended state observer(AESO) is proposed to estimate the unmeasured states and disturbance, in which the model parameters are adjusted in real time. Theoretical analysis shows that the estimation errors of the disturbances and unmeasured states converge exponentially to zero, and the parameter estimation error can be obtained from the extended state. Then, based on the extended state of the AESO, a novel parameter estimation law is designed. Due to the convergence of AESO, the novel parameter estimation law is insensitive to controllers and excitation signal. Under persistent excitation(PE) condition, the estimated parameters will converge to a compact set around the actual parameter value. Without PE signal, the estimated parameters will converge to zero for the extended state. Simulation and experimental results show that the proposed method can accurately estimate the unmeasured states and disturbance of the chain shell magazine, and the estimated parameters will converge to the actual value without strictly continuous PE signals.展开更多
针对具有非最小相位特性的单电感双输出Buck-Boost变换器(SIDO Buck-Boost)输出两支路存在严重的交叉影响、控制困难以及系统暂态性能差等问题,提出一种基于扩张状态观测器(extended state observer,ESO)的主路微分平坦控制(differentia...针对具有非最小相位特性的单电感双输出Buck-Boost变换器(SIDO Buck-Boost)输出两支路存在严重的交叉影响、控制困难以及系统暂态性能差等问题,提出一种基于扩张状态观测器(extended state observer,ESO)的主路微分平坦控制(differential flatness based control,DFBC)和支路改进双闭环自抗扰控制(active disturbance rejection controller,ADRC)的控制策略.首先,根据主路微分平坦理论,在主路控制中设计微分平坦控制器,并对微分平坦系统进行误差反馈;设计ESO对主路的扰动项进行观测,将观测后的状态量反馈到微分平坦控制器中.其次,针对支路存在耦合以及右半平面零点的问题,设计改进型双闭环ADRC进行系统解耦,其中,电流内环选取基于模型补偿和前馈补偿的ADRC,电压外环选取普通ADRC,然后,利用Lyapunov理论证明系统的稳定性.最后,在Matlab/Simulink平台中搭建了仿真模型,并基于HIL搭建了实验平台.仿真及实验结果表明:所提控制策略减小了输出两支路之间的交叉影响,解决了非最小相位系统控制困难的问题,提高了系统的暂态响应性能.展开更多
现代电网对火电机组参与调峰调频提出了日益严格的要求。在"炉跟机"协调方案下,汽轮机调节系统的快速性使其能很好地满足电网负荷调度的要求,但同时可能会造成进汽调门反复调节。文中通过探究传统控制方案的缺陷,提出一种基...现代电网对火电机组参与调峰调频提出了日益严格的要求。在"炉跟机"协调方案下,汽轮机调节系统的快速性使其能很好地满足电网负荷调度的要求,但同时可能会造成进汽调门反复调节。文中通过探究传统控制方案的缺陷,提出一种基于扩张状态观测器(extended state observer,ESO)的新型汽轮机功频电液串级控制策略,将原串级PI方案修正为串级比例控制,以ESO实时估计各种扰动并作为新的一级加以主动补偿。频域分析表明本方案能够有效克服传统设计中快速性和稳定性的矛盾。动态仿真结果表明,该方案能够以较小控制代价满足电网调峰调频的要求,控制量波动范围显著减小,且具有更强的抗扰能力和鲁棒性。展开更多
针对内嵌式永磁同步电机无位置传感器控制系统,基于自抗扰控制技术和高频信号注入技术,提出了以转子位置角为扩张状态观测器(extended state observer,ESO)主体变量的自抗扰控制系统.该方法避免了传统算法中以电流为ESO主体变量时依靠...针对内嵌式永磁同步电机无位置传感器控制系统,基于自抗扰控制技术和高频信号注入技术,提出了以转子位置角为扩张状态观测器(extended state observer,ESO)主体变量的自抗扰控制系统.该方法避免了传统算法中以电流为ESO主体变量时依靠角速度估计值积分来获得转子位置角估计值所带来的误差积累问题.该方法在电机起动、负载突变等电流波形正弦度较差的情况下,仍能保证转子位置角的估计值具有较高的精度.仿真结果验证了所提出方法的正确性和优越性.展开更多
文摘Based on the system dynamic model, a full system dynamics estimation method is proposed for a chain shell magazine driven by a permanent magnet synchronous motor(PMSM). An adaptive extended state observer(AESO) is proposed to estimate the unmeasured states and disturbance, in which the model parameters are adjusted in real time. Theoretical analysis shows that the estimation errors of the disturbances and unmeasured states converge exponentially to zero, and the parameter estimation error can be obtained from the extended state. Then, based on the extended state of the AESO, a novel parameter estimation law is designed. Due to the convergence of AESO, the novel parameter estimation law is insensitive to controllers and excitation signal. Under persistent excitation(PE) condition, the estimated parameters will converge to a compact set around the actual parameter value. Without PE signal, the estimated parameters will converge to zero for the extended state. Simulation and experimental results show that the proposed method can accurately estimate the unmeasured states and disturbance of the chain shell magazine, and the estimated parameters will converge to the actual value without strictly continuous PE signals.
文摘针对具有非最小相位特性的单电感双输出Buck-Boost变换器(SIDO Buck-Boost)输出两支路存在严重的交叉影响、控制困难以及系统暂态性能差等问题,提出一种基于扩张状态观测器(extended state observer,ESO)的主路微分平坦控制(differential flatness based control,DFBC)和支路改进双闭环自抗扰控制(active disturbance rejection controller,ADRC)的控制策略.首先,根据主路微分平坦理论,在主路控制中设计微分平坦控制器,并对微分平坦系统进行误差反馈;设计ESO对主路的扰动项进行观测,将观测后的状态量反馈到微分平坦控制器中.其次,针对支路存在耦合以及右半平面零点的问题,设计改进型双闭环ADRC进行系统解耦,其中,电流内环选取基于模型补偿和前馈补偿的ADRC,电压外环选取普通ADRC,然后,利用Lyapunov理论证明系统的稳定性.最后,在Matlab/Simulink平台中搭建了仿真模型,并基于HIL搭建了实验平台.仿真及实验结果表明:所提控制策略减小了输出两支路之间的交叉影响,解决了非最小相位系统控制困难的问题,提高了系统的暂态响应性能.
文摘现代电网对火电机组参与调峰调频提出了日益严格的要求。在"炉跟机"协调方案下,汽轮机调节系统的快速性使其能很好地满足电网负荷调度的要求,但同时可能会造成进汽调门反复调节。文中通过探究传统控制方案的缺陷,提出一种基于扩张状态观测器(extended state observer,ESO)的新型汽轮机功频电液串级控制策略,将原串级PI方案修正为串级比例控制,以ESO实时估计各种扰动并作为新的一级加以主动补偿。频域分析表明本方案能够有效克服传统设计中快速性和稳定性的矛盾。动态仿真结果表明,该方案能够以较小控制代价满足电网调峰调频的要求,控制量波动范围显著减小,且具有更强的抗扰能力和鲁棒性。
文摘针对内嵌式永磁同步电机无位置传感器控制系统,基于自抗扰控制技术和高频信号注入技术,提出了以转子位置角为扩张状态观测器(extended state observer,ESO)主体变量的自抗扰控制系统.该方法避免了传统算法中以电流为ESO主体变量时依靠角速度估计值积分来获得转子位置角估计值所带来的误差积累问题.该方法在电机起动、负载突变等电流波形正弦度较差的情况下,仍能保证转子位置角的估计值具有较高的精度.仿真结果验证了所提出方法的正确性和优越性.
