Stepper motor fuzzy PID design
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Stepper motor fuzzy PID design

Views: 0     Author: Site Editor     Publish Time: 2020-12-09      Origin: Site

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In industrial control, PID control is the most widely used analog control method, using computer to discretization of its sampling, can implement digital PID formula. This paper adopts the two-dimensional fuzzy control system, stepping motor fuzzy PID design, fuzzy reasoning input fuzzy language variables for deviation and deviation rate EC fuzzy domain for [E-3, 3]Three changes, the output of PID increment, the input of fuzzy language variables E. EC and the output of fuzzy language variables language value chosen to be elected to seven, namely, {Negative (NB), in the negative,NM), small negative (NS)The zero (Z)Is small (PS)The (,PM), board (PB)}。 A control volume deviation and deviation rate and the basic theory of domain [-0. 5 0. 5]Can determine the quantitative factor and step motor fuzzy factor table 1 KP fuzzy rules in table 2 KI fuzzy rules in table 3 KD fuzzy reasoning and fuzzy rules is very important also, fuzzy is according to the result of fuzzy reasoning, draw the amount of control process, the commonly used method is maximum membership degree method median method, weighted average method, the maximum membership degree is trapezoidal interrupt is not conducive to the stability of the system, and the weighted average method is beneficial for system stability, so this article USES the weighted reasoning. 。 Figure 2 stepper motor fuzzy PID control SIMULINK simulation model of fuzzy controller has good dynamic characteristics, but the static characteristic cannot be satisfactory, and the PID control has high steady state accuracy of static,. Introduce the PID fuzzy controller, fuzzy control a wide range of error scope, in a small range error with PID control, the conversion is controlled by a preset program automatically according to the error range.
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