Abstract
In the DC motor speed control system based on MK100N512ZLL10 micro controller, the duty cycle of DC motor depends on the micro controller module FTM PWM output, thereby control the car's speed indirectly. The speed is detected by the encoder and then fed back to the microcontroller, and micro controller gives the corresponding control pulse according to the corresponding situation. To make the smart car quickly and smoothly running through the entire process, we analyze the speed of encoder feedback and set appropriate PID parameters to adjust the corresponding pulse to control operation of the DC motor. Finally, the mathematical model of speed control system is constructed, and by the Matlab simulation experiment we give real-time control parameters according to actual running situation to make the whole system more reasonable and effective to control the smart car run fast and smoothly.
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