Active magnetic suspension accelerometer

An accelerometer and magnetic levitation technology, which is applied in the direction of acceleration measurement using inertial force, can solve the problems of poor repeatability, aggravated stabilization time, and long accelerometer stabilization time, so as to improve accuracy, reduce stabilization time, and improve alignment repeatability Effect of Accuracy and Stability Accuracy

Active Publication Date: 2018-02-23
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

When the accelerometer is flipped from one attitude to another, due to the existence of the input alignment error angle, the accelerometer takes a long time to stabilize and the repe

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  • Active magnetic suspension accelerometer
  • Active magnetic suspension accelerometer
  • Active magnetic suspension accelerometer

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Embodiment Construction

[0026] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. It should be noted that this embodiment is narrative and not restrictive, and the protection scope of the present invention cannot be limited by this.

[0027] An active magnetic levitation accelerometer, such as figure 1 As shown, it mainly includes float part 2, left end cover part 3, right end cover part 4, adjustment end cover part 5, housing part 6, volume compensation device part 7, temperature measurement and heat preservation part 8, magnetic levitation control module 9, all parts The design is as symmetrical as possible. The float part forms the pendulum of the unbalanced mass and is sensitive to acceleration. The sensor rotor and the torque device rotor are installed on both ends of the float component, and the small ball shaft supporting the float component is installed on the output pivot.

[0028] The radial magnetic levitation mover 24 is coa...

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Abstract

The invention relates to an active magnetic suspension accelerometer with high alignment, high stability and high resolution; the active magnetic suspension accelerometer comprises a short circuit turn angle sensor, a permanent magnetism torquer, a liquid float plus jewel bearing and active magnetic suspension centering, and double-end bellows volume compensation; when an inertia acceleration applies on a floater, a vertical pendulum deflects, the angle sensor senses the deflection angle, a force feedback loop forms a control current, the control current is applied to a permanent magnetism torquer control coil, thus restoring the vertical pendulum back to the zero bit; control current size symbols are matched with inertia acceleration sizes and directions. Said measures can improve the accelerometer precision; the precision of the accelerometer working under the gate state can improve by almost an order of magnitude when compared with a liquid floating integration pendulum accelerometer. The accelerometer with the active magnetic suspension technology is firstly applied in our nation, thus greatly improving the accelerometer stability and dynamic adaptability; the accelerometer canbe applied to an inertia space navigation system.

Description

Technical field [0001] The invention belongs to the technical field of accelerometers, in particular an active magnetic levitation accelerometer with high alignment, high stability and high resolution, and is particularly suitable for an inertial navigator system stabilized in an inertial space. Background technique [0002] In the past, the accelerometer of the inertial navigation system used a liquid floating integral pendulum accelerometer. The main technologies of the accelerometer include: 1) moving coil angle sensor technology; 2) permanent magnet torque device technology; 3) liquid float plus jewel bearing centering technology; 4) single-ended bellows volume compensation technology. When the inertial acceleration acts on the float, the pendulum will deflect, the angle sensor is sensitive to the deflection angle, and the control current is generated through the force feedback loop, which is applied to the permanent magnet torque device control coil to restore the pendulum t...

Claims

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Application Information

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IPC IPC(8): G01P15/03
Inventor 聂鲁燕刘晓东裴闯于洪宇林强
Owner TIANJIN NAVIGATION INSTR RES INST
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