A novel dual control method is proposed for the stochastic systems with unknown parameters, which converts the unsolvable dynamic programming problem into a tractable twostep ahead minimum variance control problem in ...A novel dual control method is proposed for the stochastic systems with unknown parameters, which converts the unsolvable dynamic programming problem into a tractable twostep ahead minimum variance control problem in a stochastic suboptimal view. Innovation variance is used to improve the learning effect, and the instant weight is introduced to reduce the influence of the future output estimation error on the system. Simulation results show the satisfactory performance of the new controller.展开更多
The control problem for single-input single-output（SISO） systems in the presence of mixed uncertainties, both stochastic and deterministic uncertainties, is considered. The stochastic uncertainties are modeled as ex...The control problem for single-input single-output（SISO） systems in the presence of mixed uncertainties, both stochastic and deterministic uncertainties, is considered. The stochastic uncertainties are modeled as exogenous noises, while the deterministic uncertainties are time invariant and appear as the unknown parameters which lie in a bounded interval. Based on a subdivision for the continuous interval, a robust adaptive controller is designed. The controller can not only realize the system output to track the desired output, but also learn a more accurate interval which contains the true value of the unknown parameter with a learning error given in advance. An example is given finally to demonstrate the effectiveness of the proposed method.展开更多
对同步发电机励磁系统性能评价一般通过阶跃响应方法,但该方法无法在线进行,为此提出了最小方差控制基准的性能评估方法。对系统设计最小方差控制器并作为系统控制性能上限,与系统实际性能进行比较而得到性能指标,并对该方法进行系统滤...对同步发电机励磁系统性能评价一般通过阶跃响应方法,但该方法无法在线进行,为此提出了最小方差控制基准的性能评估方法。对系统设计最小方差控制器并作为系统控制性能上限,与系统实际性能进行比较而得到性能指标,并对该方法进行系统滤波和相关性分析FCOR(Filtering and Correlation Analysis)算法的改进,避免了Diophantine方程的展开运算。分析表明该评估方法只需利用同步发电机输出端电压数据,结合系统时滞d就可以得到励磁系统的性能指标。仿真结果表明该方法简化了计算过程,能够及时准确地在线评估励磁系统的控制性能。展开更多
文摘A novel dual control method is proposed for the stochastic systems with unknown parameters, which converts the unsolvable dynamic programming problem into a tractable twostep ahead minimum variance control problem in a stochastic suboptimal view. Innovation variance is used to improve the learning effect, and the instant weight is introduced to reduce the influence of the future output estimation error on the system. Simulation results show the satisfactory performance of the new controller.
基金supported by the National Natural Science Foundation of China(61273127U1534208)+2 种基金the Key Program of National Natural Science Foundation of China(61533014)the Key Laboratory for Fault Diagnosis and Maintenance of Spacecraft in Orbit(SDML-OF2015004)the Science and Technology Preject of Shaanxi Province(2016GY-108)
文摘The control problem for single-input single-output（SISO） systems in the presence of mixed uncertainties, both stochastic and deterministic uncertainties, is considered. The stochastic uncertainties are modeled as exogenous noises, while the deterministic uncertainties are time invariant and appear as the unknown parameters which lie in a bounded interval. Based on a subdivision for the continuous interval, a robust adaptive controller is designed. The controller can not only realize the system output to track the desired output, but also learn a more accurate interval which contains the true value of the unknown parameter with a learning error given in advance. An example is given finally to demonstrate the effectiveness of the proposed method.
文摘对同步发电机励磁系统性能评价一般通过阶跃响应方法,但该方法无法在线进行,为此提出了最小方差控制基准的性能评估方法。对系统设计最小方差控制器并作为系统控制性能上限,与系统实际性能进行比较而得到性能指标,并对该方法进行系统滤波和相关性分析FCOR(Filtering and Correlation Analysis)算法的改进,避免了Diophantine方程的展开运算。分析表明该评估方法只需利用同步发电机输出端电压数据,结合系统时滞d就可以得到励磁系统的性能指标。仿真结果表明该方法简化了计算过程,能够及时准确地在线评估励磁系统的控制性能。
