PID调整(国外英文资料).doc

PID调整(国外英文资料) Set PID parameters in the field of training materials 1. the scope of PID regulator. PID control is a traditional control method, it is suitable for temperature, pressure, flow and level of almost all the scene, the scene is different, the PID parameter should be set, as long as the parameters are properly can achieve very good effect. Can reach 0.1%, even higher control requirements. Analysis of significance and function index of the 2. PID parameters P, I, D:y=yP+yi+, YD Set the 2.1. P parameter Name: the proportion with parameters, unit (%). The proportion of role definition: size and error of proportional control output is proportional to the size of the error, when accounted for the range of percentage reached P value, the output ratio of =100% function, which is defined as the ratio of P with parameters. That is Yp= x 100% = x 100% = Kp Err (1)? (of which: yP=KP?, Delta Delta =SP-PV, 0-100%) KP=1/ (FS?) Can also be understood as, when the error reaches the range multiplied by P (%), the proportion of output effect reached 100%. For example: range for the temperature control system of 0-1300 DEG C, when P is set to 10%, FS multiplied by P is equal to 130 DEG C, when the error reaches 130 DEG C, the proportion of output function is equal to 100%, the error changes every 1 DEG C, the proportion of output change 0.79%, if need to increase the proportion of the role of regulating ability, need to the P parameter is set smaller, or the smaller the range setting. How much can be calculated according to the method. The P= output value opened /FS 100%? The P parameter is smaller proportion, the dynamic response is quick, the stronger the ability to eliminate the error. But the actual system is inertia, control output changes, the actual PV value changes also need to wait for a period of time will slowly change. Because the actual system is inertia, the effect of the ratio should not be too strong, too strong proportional action will cause system instabil