Circuit for extracting displacement signal of eight-electrode electrostatic gyro

Abstract

The invention relates to a circuit for extracting a displacement signal of an eight-electrode electrostatic gyro. A first bridge arm capacitor (11) and a second bridge arm capacitor (12) are connected in series on an upper supporting electrode (1) and a lower supporting electrode (2); a constant frequency voltage source (10) is connected between the first bridge arm capacitor (11) and the second bridge arm capacitor (12); a first bridge arm resistor (13) is connected with a second bridge arm resistor (14) in series to form a first capacitor bridge arm which is connected in parallel with a capacitor bridge arm formed by the first bridge arm capacitor (11) and the second bridge arm capacitor (12); a third bridge arm resistor (15) is connected in series with a fourth bridge arm resistor (16) to form a second resistor bridge arm, wherein two ends of the resistor bridge arm are respectively connected with the first resistor bridge arm through a first band trap (17) and a second band trap (18); and two leading-in ends of a measuring circuit (21) are respectively connected to the electrical connection position of the first bridge arm resistor (13) and the second bridge arm resistor (14) as well as the electrical connection position of the third bridge arm resistor (15) and the fourth bridge arm resistor (16).

Description

technical field [0001] The invention relates to a circuit for extracting displacement signals of an eight-electrode electrostatic gyroscope. Background technique [0002] The electrostatic gyroscope is the inertial measurement device with the highest precision among the gyroscopes realized at present. The electrostatic gyroscope relies on the electrostatic force of the electrostatic field to suspend the high-speed rotating rotor in the high-vacuum spherical cavity. It has the advantages of no mechanical contact, small interference force, and high precision. The electrostatic gyroscope controls the voltage on the corresponding electrodes by detecting the displacement of the rotor relative to the spherical cavity, so that the rotor is suspended in the center of the spherical cavity through the electrostatic attraction of the electrodes to the rotor. [0003] According to the division of spherical electrodes, electrostatic gyroscopes can be divided into six-electrode, eight-el...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the existing eight-electrode constant voltage control scheme, the signal acquisition card of the electrostatic gyroscope has no equipotential point for access when the degree of freedom of measurement is guaranteed, and when the equipotential point is guaranteed to be connected It cannot meet the shortcomings of the measurement degree of freedom, and provides an electrostatic gyroscope displacement signal extraction circuit

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