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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。
In order to ensure that the standard boiler system can be operated in a wide range and in all conditions, a double-loop control structure is proposed. That is, the inner loop adopts adaptive non-linear control to realize linearization of input-state feedback while the outer loop adopts linear controller. The control strategy can automatically restrain the influence of unknown factors such as system parameter uncertainty and external disturbances, and does not depend on the exact mathematical expression of the model. The simulation shows that the adaptive nonlinear control strategy is an effective way to solve a class of nonlinear system control problems with non-minimum phase characteristics.