The invention discloses a fuzzy control method for the revolution speeds of high-pressure diaphragm pumps. According to the method, on the premise that a
diaphragm pump fixed revolution angle difference
control system is used for strictly keeping all the pumps at a constant revolution angle difference synchronous relation, a synchronous speed relation is kept, during the same
pulse period, revolution angle initial positions of all the pumps are strictly coordinated, and a set revolution angle difference value is kept. According to the
diaphragm pump fixed revolution angle difference
control system, a master-slave control structure is adopted,
crank angles and the revolution speed of the first
diaphragm pump are used as given references of revolution angles and revolution speeds of all moving shaft driving motors of the pump set. According to the method, the output frequency of a frequency converter is determined by analyzing input
motor speed deviations and a deviation change rate, and therefore the speed of slave motors is adjusted, and the slave motors have good following performance to main motors. By means of the solution, the anti-disturbance performance of a
system with the multiple high-pressure diaphragm pumps is improved, and the
system has instant responsiveness and good stability.