Abstract
Local ventilator is an important equipment in the process of underground coal mine excavation, and its reliability and efficiency directly affect the safety of gas emission. Because of the characteristics of large lag, non-linearity and multi-disturbance of local fan control system, the traditional PID control method can not achieve the desired control effect, so an intelligent control technology, i.e. fuzzy control, is put forward and applied to the local fan control system, and the fuzzy control algorithm is improved. The improved fuzzy controller can pass through the local part according to the gas concentration in the heading face. The speed of fan is adjusted in real time to ensure the safety of underground working environment, and the fuzzy control of gas concentration and frequency conversion speed regulation of local fan is realized. The fuzzy control not only improves the ventilation control performance and automation level, but also has remarkable energy-saving effect and better control performance.
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