活性炭焦油温度的PID自整定方法研究

Research of PID Self-tuning Method of Tar Temperature in Activated Carbon

针对活性炭制备过程中焦油温度使用传统的PID人工整定耗时长、效率差、自动化程度低等问题,设计了一种PID自整定方法;利用基于MATLAB的描述函数法获取系统自持振荡的幅值和频率,结合扩充临界比例度法,通过调节非线性继电环节的滞环宽度和高度使系统在一定超调下快速性达到最优,在PLC中编程实现;经测试,达到了预期的效果;通过自整定,改善了系统的调节速度,提高了活性炭制备过程的自动化程度和生产效率,对活性炭焦油温度的时滞系统PID自整定有着一定的应用价值。

For the problems of time-consuming,low efficiency,low degree of automation using the traditional PID artificial tuning in the temperature of coal tar in the preparation of activated carbon,designed a PID self- tuning method.Using describing function method based on MATLAB to acquire system amplitude and frequency of self-sustained oscillation,combined with the expanded critical proportion degree method,by regulating hysteresis width and height of nonlinear relay link can make the system rapidly optimal under certain overshoot,programming and realization in PLC.After the test,the anticipated effect has achieved.Through the self-tuning,the adjusting speed of system has been improved,the automation and production efficiency of the preparation process of activated carbon has been improved,and has a certain application value in PID self-tuning in system with time delay of tar temperature in activated carbon.