Inertial sensor correction verification method based on finite element analysis model

Abstract

The invention provides an inertial sensor correction verification method based on a finite element analysis model, and the method comprises the steps: adjusting the size of an inspection mass in an existing inertial sensor and the distance between the inspection mass and an electrode plate, and obtaining an improved inertial sensor; utilizing a finite element analysis model to obtain a capacitance finite element simulation value and an electrostatic force simulation value between the inspection mass and the electrode plate in the improved inertial sensor, and a capacitance gradient formed among devices of the improved inertial sensor; obtaining a corrected electrostatic force according to the capacitance gradient; therefore, the inertial sensor meeting the preset requirements is obtained and is used for gravitational wave detection in the space. The method has the beneficial effects that the electrostatic force borne by the inspection mass in the improved inertial sensor is reduced, and the electrostatic force requirement applied to inertial sensor position control through the injection electrode is reduced.

Description

technical field [0001] The invention relates to the field of inertial sensors, in particular to a verification method for inertial sensor correction based on a finite element analysis model. Background technique [0002] The general theory of relativity is one of the most brilliant achievements of human beings in the field of natural science in the 20th century, and gravitational waves are the most important prediction of general relativity, so the detection of gravitational waves is of great scientific significance to the development of physics. Since LIGO first detected gravitational waves in 2016, dozens of gravitational wave events have been detected by ground-based gravitational wave detection equipment. However, due to the influence of ground vibration noise and ambient temperature, ground detection equipment cannot complete the detection of low-frequency gravitational waves below 1.0 Hz. Gravitational wave detectors in space can greatly reduce these effects, so they ...

AI Technical Summary

Problems solved by technology

After the launch of the LPF in 2016, the data obtained show that the accuracy requirements for detecting gravitational waves have been met in the high-frequency region, but at low frequencies, due to the greater influence of Brownian noise, the performance of the LPF cannot meet the requirements for detecting gravitational wave signals. demand, what the present invention will solve is exactly the problem that the inertial sensor of LPF has insufficient precision in the low frequency part

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