Space inertial sensor ground test device

Abstract

The invention relates to a spatial inertial sensor ground test device which comprises proof mass, a capacitive displacement transducer, a controller, a static execution mechanism and a suspension mechanism; and a suspension point between the suspension mechanism and the proof mass is positioned at the centroid of the proof mass. The test device realizes test on the performance of a static suspension accelerometer on three rotational freedom, can simulate the space environment more truly on the ground, and provides more comprehensive test on the performance of the static suspension accelerometer.

Description

technical field [0001] The invention relates to the field of high-precision inertial sensors, in particular to a space inertial sensor meter ground test device. Background technique [0002] High-precision inertial sensors have important application prospects in satellite navigation and positioning, dragless spaceflight, gravity satellite measurement, and basic science experiment satellites. At present, the most mature high-precision inertial sensor is the electrostatic levitation accelerometer. The electrostatic levitation accelerometer mainly includes four parts: a cube inertial sensitive mass (also known as a test mass), a capacitive displacement sensor, a controller and an electrostatic actuator. The controller feedback operation applies the corresponding voltage to the capacitor plate, and the electrostatic force acting on the test mass pulls the test mass back to its equilibrium position. At this time, the feedback voltage applied to the plate measures the capacitor p...

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Problems solved by technology

But it should be noted that, for the usual torsion suspension, see figure 1 , the inspection mass can only simulate the working condition of the electrostatic levitation accelerometer in the torsional direction, and the movement of the inspection mass in other degrees of freedom is still stable. Therefore, usually the twisted wire suspension scheme can only simulate the weightlessness state in one torsional direction

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