基于模糊推理的自调整PID控制策略在区域温热灌注疗法中的应用

Application of Fuzzy Self-modification PID Control in Part Perfusion Hyperthermia

区域温热灌注疗法是一种治疗肿瘤的有效方法,其控制过程表现出大时滞、强非线性、时变的特点,传统控制策略不能有效对其实施控制。采用模糊推理的自调整PID控温算法,解决不同的患者、在更换不同加热器导致对象特性变化使温控性能降低的问题,确保仪器对任何患者都具有良好的疗效。试验表明,算法适应性强、抗干扰能力强、温控精度高,仪器工作稳定可靠,具有较高的应用价值。

Part peffusion hyperthermia is an effective approach to cure tumour. The characteristics of the control process are big time-delay, strong nonlinear, time-varying. Traditional control strategy can＇t control it effectively. Fuzzy self-modification PID control algorithm was adopted to solve the problem of temperature control performance reduction due to process characteristics changing with different heaters and patients. Good curative effect was ensured to all patients. The experimental results demonstrate that the new algorithm has strong adaptability and anti-disturbance capability, the equipment works stably and reliably and has application value.