摘要
针对一类具有输出反馈耦合的离散非线性系统,将过程的非线性状态空间模型等效为线性时变状态空间模型;然后利用最小二乘法辨识系统参数,并通过在目标函数中引入系统状态的变化给出一种具有类似离散PI最优调节器结构的新型自适应预测函数控制器.由于引入了新的优化目标函数,该控制器控制效果与鲁棒性要优于仅考虑预测输出误差的传统预测函数控制器.仿真结果表明,该控制器优于经典离散PI最优调节器.
An adaptive predictive functional control method for a class of discrete nonlinear systems is presented by changing the nonlinear model into an equivalent time varying linear model. RLS algorithm is used to identify the timevarying coefficients. The structure of this method is similar to classic PI optimal controller. Its control performance and robustness are superior to traditional predictive functional control methods which only consider output errors. Simulation results show that it is better than classic PI optimal controller.
出处
《控制与决策》
EI
CSCD
北大核心
2007年第6期711-715,共5页
Control and Decision
基金
国家自然科学基金项目(60421002)
