标准锅炉系统的适应性非线性控制

Adaptive nonlinear control of a benchmark boiler system

为了保证标准锅炉系统实现大范围、全工况优化运行,提出一种双环的控制结构,即内环采用适应性非线性控制,实现输入-状态反馈线性化,而外环采用线性控制器。该控制策略能自动抑制系统参数不确定性和外部扰动等模型未知因素的影响,不依赖模型的精确数学表达式。仿真表明,该适应性非线性控制策略是解决一类具有非最小相位特性的非线性系统控制问题的有效途径。

A double-loop control structure was developed to guarantee optimal operation of a benchmark boiler over the whole operating range, with the inner loop using adaptive nonlinear control to provide input-state feedback linearization and the outer loop using linear control to track performance. The adaptive nonlinear control automatically compensates for the effects of system parameter uncertainty and the unpredictable disturbances without accurate mathematical models. Simulation results show that the adaptive nonlinear control is an effective approach to a class of nonlinear systems with non-minimum phase characteristics.