基于模糊分数阶PID的蒸煮药液温度控制

Temperature Control of Cooking Liquor Based on Fuzzy Fractional PID

关键词:  蒸煮药液  分数阶PID  解耦控制

Key Words:cooking liquid  fractional PID  decoupling control

摘要:鉴于蒸煮锅温度变化具有大时滞、耦合强、干扰多等特点，本课题根据蒸煮锅药液温度变化的内部规律，分析了影响药液温度的因素。针对蒸煮药液耦合强的问题，提出分数阶PID串级前馈解耦控制方案，结合模糊控制规则构建模糊分数阶PID串级解耦控制，可同时解决蒸煮药液温度变化等问题。实践证明该方法可以实现蒸煮温度的实时控制。

Abstract:According to the internal mechanism of the temperature change of cooking liquor in digester， the factors affecting the temperature of the chemical liquor were analyzed. It is well known that the temperature change of digester has the characteristics of large time lag， strong coupling， and more interfering. Aiming at the problem of strong coupling of cooking liquor， a fractional PID cascade feed forward decoupling control scheme was proposed， combining with fuzzy control rules， to construct a fuzzy fractional PID cascade decoupling control， which could simultaneously solve the temperature control of cooking liquor with large time lag， and more interfering problems practice proved that this method could achieve real-time control of cooking temperature and met the control requirements.