针对火电单元机组负荷控制系统的特点,提出一种基于多变量Laguerre函数的分数阶PID预测控制(multivariable Laguerre function model predictive control combined with fractional-order PID,MLMPC-FOPID)算法。使用增量式Laguerre函...针对火电单元机组负荷控制系统的特点,提出一种基于多变量Laguerre函数的分数阶PID预测控制(multivariable Laguerre function model predictive control combined with fractional-order PID,MLMPC-FOPID)算法。使用增量式Laguerre函数模型作为预测模型,通过带遗忘因子的最小二乘递归方法对Laguerre系数矩阵进行在线辨识,使得预测模型近似于真实的被控对象,并将预测模型的性能指标改写成分数阶PID参数形式,以提高系统的动态性能和鲁棒性。与其他控制算法的对比结果表明,所提出算法能很好地应对火电单元机组的特性变化,快速性和准确性方面大大提高,是一种有效的控制策略。展开更多
A multi-mode adaptive controller was proposed. The controller features in thecombination of Bang-bang and Fuzzy PID controls with state predictor. When large error exists, thecontroller operates in Bang-bang mode, oth...A multi-mode adaptive controller was proposed. The controller features in thecombination of Bang-bang and Fuzzy PID controls with state predictor. When large error exists, thecontroller operates in Bang-bang mode, otherwise it works as a fuzzy PID controller. For only fewparameters to be adjusted, the real time controlled system achieveed good stability and fastresponse. Furthermore, the introduction of state observer was also discussed to extend thecapability of the proposed controller to the plant with time-delay factors. The classical PIDcontroller and the multi-mode controller were applied to the same second-order system successively.By comparison of the simulation results, the effectiveness of the controller were shown. At last, onelectric-wire production line, this approach was practiced to control electric-wire diameter withan additive random disturbance signal. The test result further proved the effectiveness of themulti-mode controller.展开更多
文摘针对火电单元机组负荷控制系统的特点,提出一种基于多变量Laguerre函数的分数阶PID预测控制(multivariable Laguerre function model predictive control combined with fractional-order PID,MLMPC-FOPID)算法。使用增量式Laguerre函数模型作为预测模型,通过带遗忘因子的最小二乘递归方法对Laguerre系数矩阵进行在线辨识,使得预测模型近似于真实的被控对象,并将预测模型的性能指标改写成分数阶PID参数形式,以提高系统的动态性能和鲁棒性。与其他控制算法的对比结果表明,所提出算法能很好地应对火电单元机组的特性变化,快速性和准确性方面大大提高,是一种有效的控制策略。
基金This research was financially supported by the Open Fund of the Fieldbus tech& Automation Beijing Key Lab (No.2002.19-21).
文摘A multi-mode adaptive controller was proposed. The controller features in thecombination of Bang-bang and Fuzzy PID controls with state predictor. When large error exists, thecontroller operates in Bang-bang mode, otherwise it works as a fuzzy PID controller. For only fewparameters to be adjusted, the real time controlled system achieveed good stability and fastresponse. Furthermore, the introduction of state observer was also discussed to extend thecapability of the proposed controller to the plant with time-delay factors. The classical PIDcontroller and the multi-mode controller were applied to the same second-order system successively.By comparison of the simulation results, the effectiveness of the controller were shown. At last, onelectric-wire production line, this approach was practiced to control electric-wire diameter withan additive random disturbance signal. The test result further proved the effectiveness of themulti-mode controller.
