High Precision Magnetic Suspension Accelerometer

Abstract

The invention discloses a high-precision static magnetic suspension accelerometer, and the accelerometer is used for measuring the linear accelerometer of an aircraft. The accelerometer comprises a vacuum magnetic shielding chamber system, a magnetic field displacement sensing system, a static magnetic suspension control system, and an examination magnet. The accelerometer employs the technology of magnetic field displacement sensing to achieve the real-time precise measurement of the position and posture of the examination magnet, and employs the technology of static magnetic suspension control to achieve the precise regression control of the position and posture of the examination magnet, thereby enabling the examination magnet to be continuously controlled at the center of a chamber, i.e., the center of mass of a space aircraft. When an external nonconservative force acts on the space aircraft, the size and direction of the acceleration can be precisely measured finally through the measurement of the current of a position control coil because the acceleration of the aircraft will be in direct proportion to the amplitude of the current of the position control coil. The accelerometer can avoid a technical bottleneck of high-precision machining, is simple in manufacturing technology, and can achieve higher-precision acceleration vector measurement.

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. 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 The environment is monitored to serve microgravity scientific experimen...

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

Images