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针对激光热疗法中组织温度模型的纯滞后和大惯性,提出一种新颖的带Smith预估器的模糊PID控制系统.模糊PID控制器是由一个简单的模糊PI控制器和一个简单的模糊PD控制器并行结合而成.模糊PID控制器的增益通过解析推导与线性PID控制器的增益相联系.设计好的线性PID控制器的增益可用于在线设计模糊PID控制器.计算机仿真结果表明模糊控制系统在组织温度控制中比对应的线性PID控制系统鲁棒.
Aiming at the pure hysteresis and large inertia of tissue temperature model in laser hyperthermia, a novel fuzzy PID control system with Smith predictor is proposed.The fuzzy PID controller is composed of a simple fuzzy PI controller and a simple fuzzy PD Controller in parallel.The gain of the fuzzy PID controller is analytically derived and related to the gain of the linear PID controller.The gain of the designed linear PID controller can be used to design the fuzzy PID controller online.Computer simulation results show that the fuzzy control The system is more robust than the corresponding linear PID control system in tissue temperature control.