Application of Antai Electronic Power Amplifier in Displacement Sensor
“Experiment name: Power amplifier based on the application of voice coil motor test system design Experiment purpose: On the basis of the developed voice coil motor direct drive water hydraulic control valve, the structure of the direct drive valve is improved, and the voice coil motor direct drive water is established. The dynamic mathematical model of the hydraulic valve and the experimental study were carried out. Experimental equipment: linear bearing, signal generator, power amplifier, displacement sensor, voice coil motor, force sensor, spring Experiment content: The air viscous resistance coefficient of the voice coil motor was identified through the test, and the direct drive water hydraulic valve of the voice coil motor was completed. Simulink modeling.Experimental process: (1) The voice coil motor directly drives the hydraulic valve
Experiment name:Application of Power Amplifier Based on Voice Coil Motor Test System Design
On the basis of the developed voice coil motor direct drive water hydraulic control valve, the structure of the direct drive valve is improved, the dynamic mathematical model of the voice coil motor direct drive water hydraulic valve is established, and the experimental research is carried out.
Laboratory equipment:Linear bearings, signal generators, power amplifiers, displacement transducers, voice coil motors, force transducers, springs
Experiment content:The air viscous resistance coefficient of the voice coil motor was identified through experiments, and the Simulink modeling of the direct-drive water hydraulic valve of the voice coil motor was completed.
(1) Simulink modeling of voice coil motor direct drive hydraulic valve
The open-loop simulation model from the coil voltage of the voice coil motor to the displacement of the spool is established in MATLAB/Simulink, as shown in the figure.
(2) Voice coil motor test system design and damping coefficient identification
The voice coil motor system with elastic load is a single-degree-of-freedom mass-spring-damping system, where the mass refers to the mass of the entire moving parts (including the coil, the motor shaft, and the force sensor, etc.), and the coil is subject to air resistance during movement. The resulting damping acts on the mover of the voice coil motor.
Use the signal generator to output the sinusoidal model to the power amplifier, and the power amplifier drives the motor to achieve oscillating motion. After the oscillation is stable, turn off the signal generator, collect the vibration curve of the voice coil motor position signal over time, and use MATLAB to fit the vibration The curve is in the form of a formula. As shown in the figure, the air damping coefficient is identified as 10.96N·s/m.
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