The invention relates to a sensorless speed regulation controller based on an
observation method and a sensorless speed regulation control method for a piezoelectric vibration feeder, belonging to the technical field of electromechanical
system measurement and control. The sensorless speed regulation control method is characterized in that a
frequency domain dynamic model among feeding speed, material weight, piezoelectric vibrator charge amplitude sampling
voltage and piezoelectric vibrator driving
voltage amplitude is simplified into a
static model in a
resonance frequency band, and a speed regulation
control algorithm which is used for regulating a driving
voltage according to the change of the charge amplitude of a piezoelectric vibrator is provided; the provided sensorless controller comprises a rectification filtering voltage stabilizing circuit, an
inverter circuit, a driving voltage filter circuit, a sampling
resistor, a piezoelectric vibrator charge extracting circuit, a processor, a display panel and a keyboard, wherein the piezoelectric vibrator charge extracting circuit comprises a linear photoelectrical
coupling circuit, a
low pass filter, an integral circuit and a peak holding circuit. The controller and the method have the advantages and the beneficial effects that a piezoelectric vibrator is used as a
vibration exciter and a sensor, the speed regulation control can be conducted without adding an additional amplitude sensor, and when the sensorless speed regulation controller is applied to the existing piezoelectric vibration feeder, the body structure does not need to be changed.