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The test method of the relative position sensor of double ultra-satellite

A technology of relative position and testing method, which is applied in the testing of machines/structural components, static/dynamic balance testing, instruments, etc., and can solve the problems of unresolved position sensor theoretical output, unresolved attitude motion and translational motion of the center of mass , It is impossible to achieve the effect of simple and effective test method and good test effect according to the intersection point between the extension line of the position sensor probe and the reflective surface

Active Publication Date: 2020-10-09
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

Although the application can carry out embedded simulation test to make the simulation result closer to the actual application, the application does not solve the attitude motion and the translational motion of the center of mass between the two cabins, and cannot obtain Without the accurate theoretical output of the position sensor, it cannot provide guarantee for the double super satellite ground test

Method used

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  • The test method of the relative position sensor of double ultra-satellite
  • The test method of the relative position sensor of double ultra-satellite
  • The test method of the relative position sensor of double ultra-satellite

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Embodiment

[0053] In the present embodiment, the method for testing the relative position sensor of the double ultra-satellite of the present invention comprises the following steps:

[0054] Step 1, obtain the direction cosine matrix of the load cabin relative to the platform cabin according to the attitude dynamics and kinematic equations of the platform cabin and the load cabin; obtain the relative position vector of the two cabin centroids according to the relative translation equation of the two cabin centroids;

[0055] In step 2, the coordinates of a point on the reflective surface are obtained according to the distance between the reflective surface of the position sensor and the center of mass of the load compartment, and the equation of the reflective surface can be obtained by combining the normal vector of the reflective surface;

[0056] Step 3, according to the coordinates of the position sensor probe in the coordinate system of the platform cabin, the corresponding reflecti...

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Abstract

The invention relates to a test method for a double super satellite relative position sensor. The method comprises steps that S1, a direction cosine matrix of a load cabin relative to a platform cabinis calculated based on the recursive two-cabin relative attitude of a dynamic model, according to the dynamic model, position coordinates of the center of mass of the load cabin in the platform cabincoordinate system are obtained; S2, coordinates of a point on a reflective surface of a position sensor probe in the platform cabin coordinate system is obtained, and thereby an equation of the reflective surface is obtained; S3, coordinates of intersection points of an extension line of the position sensor probe and the reflection surface in the platform cabin coordinate system are obtained; andS4, a theoretical value outputted by a position sensor is obtained, in combination with noise characteristics, a simulation value outputted by the position sensor can be obtained. The method is advantaged in that accurate modeling and test problems for the position sensor output in the double super satellite ground test process are solved.

Description

technical field [0001] The invention relates to the technical field of ground testing of dual supersatellites, in particular to a testing method for a relative position sensor of a dual supersatellite. Background technique [0002] The non-contact magnetic levitation actuator realizes dynamic and static isolation between the platform cabin and the payload cabin of the dual-super satellite, so that the platform cabin cannot be transmitted to the Load cabin, so as to realize the ultra-high pointing accuracy and ultra-high stability control of the load cabin. In order to realize the cooperative control between the two cabins, it is necessary to obtain the relative attitude and the relative position of the center of mass of the two cabins through the calculation of the non-contact position sensor installed between the two cabins. [0003] When the double supersatellite carries out the desktop joint test, it is necessary for the dynamic computer to apply an external excitation s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01M1/12
Inventor 张健边志强程卫强洪振强赵艳彬栗双岭徐凯易灵
Owner SHANGHAI SATELLITE ENG INST
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