High-voltage electrostatic levitation circuit for ground testing of electrostatic levitation accelerometers

Abstract

The invention provides a high-voltage static suspension circuit suitable for ground testing of a static suspension acceleration meter. The circuit comprises a reversal phase circuit, an upper electrode plate high-voltage drive circuit, a lower electrode plate high-voltage drive circuit and a high-voltage power source. Voltage control signals output by a PID controller are used as input of the reversal phase circuit. Output of the reversal phase circuit and offset control signals are used as input signals of the lower electrode plate high-voltage drive circuit. The voltage control signals and the offset control signals are used as input signals of the upper electrode plate high-voltage drive circuit. Offsetting is carried out on the voltage control signals to obtain high-voltage control signals of an upper electrode and a lower electrode respectively. The high-voltage control signals are used for controlling base currents of a high-voltage drive audion, so that currents flowing through a collector of the audion are controlled; voltage dividing is carried out on the high-voltage power source through a voltage dividing resistor, proper voltage is exerted on the upper electrode and the lower electrode corresponding to high-precision static suspension acceleration meter sensors, and electricity large enough is provided for realizing suspension testing of testing masses of the acceleration meter.

Description

technical field [0001] The invention relates to a high-voltage electrostatic suspension circuit suitable for ground testing of an electrostatic suspension accelerometer, which belongs to the technical field of measurement. Background technique [0002] The high-precision electrostatic levitation accelerometer is a capacitive differential measurement inertial acceleration sensor. It has the characteristics of low measurement frequency, small range, high resolution and large dynamic range. It is especially suitable for measuring quasi-steady state and small acceleration signals. It plays an important role in scientific experiments, satellite drag-free control, active vibration reduction, satellite gravity measurement and other fields. [0003] The system composition and measurement principle of the electrostatic levitation accelerometer are as follows: figure 1 As shown, it mainly includes an inertial sensor probe (mainly composed of a proof mass and electrodes surrounding it...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to overcome the defects of the prior art, to solve the problem of how to carry out comprehensive functional verification and performance calibration of the electrostatic levitation accelerometer on the ground, and to propose a method for ground testing of the electrostatic levitation accelerometer. High voltage electrostatic levitation circuit

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