【摘要】 将基于FIR模型的预测函数控制算法推广到各通道开环渐进稳定多变量系统,为简单起见,针对2输入2输出系统,给出了采用单基函数(阶跃函数)的控制律解析解。考虑控制变量的幅值和速度约束,并将二者统一为速度约束,在线计算简单。将该算法应用到单元机组负荷控制系统中,仿真结果表明,系统具有良好的控制性能和很强的鲁棒性,尤其是,机组特性的变化几乎没有削弱系统的负荷跟踪性能。更多还原

【Abstract】 Predictive functional control (PFC) algorithm based on FIR model is extended to multi-input multi-output (MIMO) case, considering the multi-variable system with open-loop asymptotically stable transfer functions. For explicitness, systems with 2 inputs and 2 outputs are considered with limitations on the amplitude and first order variation (speed) of input variables. Those limitations are unified into speed constraints, an inequation only with increment of manipulated input, so that the online computation is very simple. Finally, the proposed multi-variable PFC algorithm is applied to thermal power unit load systems, and simulation results show that the system has favourable performance and strong robustness; especially, the variation of unit characteristics doesn抰 weaken the load-tracking ability.更多还原