High-precision magnetostatic suspension accelerometer adopting multiple quadrupole coil independent regression control technology

Abstract

The invention discloses a high-precision magnetostatic suspension accelerometer adopting a multiple quadrupole coil independent regression control technology, used for measuring a linear accelerationof an aircraft. The high-precision magnetostatic suspension accelerometer comprises a vacuum magnetic shielding cavity system, a magnetic field displacement sensing system, a multiple quadrupole coilmagnetic suspension control system and an inspection magnet. The accelerometer disclosed by the invention realizes real-time accurate measurement on position and attitude of the inspection magnet by adopting a magnetic field displacement sensing technology and realizes accurate regression control on position and attitude of the inspection magnet by adopting a multiple quadrupole coil independent regression control magnetic suspension technology, so that the inspection magnet is controlled to be always at the center of the cavity and a location of the mass center of a spacecraft; and when the spacecraft is effected by an external nonconservative force, magnitude and direction of the acceleration can be finally accurately measured by measuring a position control coil current as the acceleration of the aircraft is in direct proportional to the position control coil current. The accelerometer disclosed by the invention can avoid a technical bottleneck of high-precision machining, is simplein production process and can realize acceleration vector measurement with higher precision.

Description

technical field [0001] The invention relates to the technical field of acceleration measuring devices, in particular to a high-precision static magnetic levitation accelerometer using multiple quadrupole coil independent regression control technology. Background technique [0002] The accelerometer is an instrument for measuring the linear acceleration of the aircraft. The high-precision accelerometer is the key load for the global gravity field mapping task of the gravity measurement satellite. It will improve the measurement accuracy of the global gravity field and establish a unified elevation reference; at the same time, it can also be used to improve the existing The space atmospheric model greatly improves the accuracy of orbit determination and orbit prediction of low-orbit satellites; for high-orbit satellites, it can measure solar light pressure to realize precise orbit determination and orbit maintenance of high-orbit satellite spacecraft; microgravity of spacecraft...

AI Technical Summary

Problems solved by technology

The commonly used high-precision electrostatic levitation accelerometer is limited by the processing technology such as electrode orthogonality and panel symmetry, and the influence of circuit noise, parasitic force noise, environmental noise, etc. is inevitable

Existing accelerometers with magnetic levitation and magnetic force regression control, when controlling the position and attitude return of the test magnet, the return control of the position may introduce torque to the test magnet, thereby limiting the accuracy of acceleration measurement

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