In hydraulic synchronizing lifting technology for oversize structure, computer output PWM signal as the input current of proportional valve is used to control the velocity of hydraulic cylinder.

The author describes the fuzzy control towards high pressure air valve in raw coal separation system, including fuzziness of input, setting up of fuzzy control rules and certainty of outputs.

The author describes the fuzzy control towards high-pressure air valve in raw coal separation system, including fuzziness of input, setting-up of fuzzy control rules and certainty of outputs.