A pilot-operated servo valve control system driven by a voice coil motor and its control method

Abstract

The invention discloses a voice-coil-motor-driven pilot servo valve control system and control method, belonging to the technical field of servo valve control. The voice-coil-motor-driven pilot servo valve control system comprises a servo valve control circuit, a computer, a servo valve, a pumping source, a sensor detection system and a motion actuator, wherein the computer is connected with a CAN (controller area network) bus interface circuit of the servo valve control circuit; a servo valve drive circuit of the servo valve control circuit and the pumping source are respectively connected with the servo valve; the sensor detection system comprises a pressure and flow sensor and a displacement and speed sensor; the servo valve is respectively connected with the motion actuator and the pressure and flow sensor; the motion actuator is connected with the displacement and speed sensor; and the pressure and flow sensor and the displacement and speed sensor are respectively connected with an MCU (microprogrammed control unit). The servo valve coil is driven by an H bridge drive circuit composed of two MOS (metal oxide semiconductor) tubes and two triodes, and thus, the voice-coil-motor-driven pilot servo valve control system has the characteristics of high control stability and high control accuracy.

Description

technical field [0001] The invention relates to the technical field of servo valve control, in particular to a pilot servo valve control system driven by a voice coil motor and a control method thereof. Background technique [0002] The working principle of the voice coil driven servo valve is that an energized coil (conductor) will generate a force in a magnetic field, and the magnitude of the force is proportional to the current applied to the coil. Its basic structure is a moving coil set on a fixed permanent magnet. When the signal current is input to the coil, under the action of the electromagnetic field effect, the coil generates an axial force corresponding to the signal current, and drives the valve directly connected to the coil. The core moves to realize the opening and closing of the valve. In order to realize the pilot servo valve control driven by the voice coil motor, the final embodiment is to realize the voice coil motor control of small current. The tradit...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of unstable control and low control precision of the voice coil motor pilot servo valve control system in the prior art, the present invention provides a voice coil motor driven pilot servo valve control system and its control method

Images