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Satellite clock and ground clock unifying method and device for ground test

A ground-testing and ground-based technology, applied in the direction of synchronization devices, transmission systems, radio transmission systems, etc., to achieve the effect of improving accuracy

Active Publication Date: 2013-06-26
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Our existing quantitative experience, accumulating 6000 seconds, the difference between the two can be 1 second

Method used

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  • Satellite clock and ground clock unifying method and device for ground test
  • Satellite clock and ground clock unifying method and device for ground test
  • Satellite clock and ground clock unifying method and device for ground test

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] What adopt in the present invention is the time of GPS simulator as the time on the satellite.

[0039] Utilize the following methods and use the time system equipment to realize the unification of the satellite and ground clocks.

[0040] Such as figure 2 As shown, the method steps are as follows

[0041] 1) The time on the satellite is the time of the GPS simulator; the simulated satellite-rocket separation signal sent by the industrial computer running the ground dynamics program is used as a common excitation source, and is input to the GPS simulator and the ground dynamics program at the same time, so that the two or start at the same time;

[0042]2) Use the time statistics equipment to simulate the GPS simulator orbit at the start time t 0GPS Count the number of second pulses after the second, and the number of seco...

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PUM

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Abstract

The invention relates to the technical field of aerospace tests, and particularly discloses a satellite clock and ground clock unifying method and device for a ground test. The satellite clock and ground clock unifying method comprises the following steps of: simultaneously starting a GPS (Global Position System) simulator and a ground dynamic program by utilizing a simulating satellite and rocket separation signal starting ground dynamics as a common excitation source during a satellite ground flight simulation test; reducing the initial error of a satellite clock and a ground clock to a negligible microsecond grade by substituting an electrical signal for the operation of different persons; and timing the ground dynamic clock by utilizing accurate time obtained by counting second pulsesof the GPS simulator so that the difference of the satellite clock and the ground dynamic clock does not change with the duration of test time, wherein the difference of the satellite clock and the ground clock reaches a millisecond grade in the integral test process. The invention enhances the accuracy degree of a system.

Description

technical field [0001] The invention belongs to aerospace testing technology, and in particular relates to a method for unifying clocks on a satellite and a ground clock and time control equipment thereof. Background technique [0002] The feasibility and correctness of the satellite attitude and orbit control scheme are directly related to the safety of the satellite in orbit. Therefore, the attitude and orbit control scheme of the satellite must be fully verified by ground experiments. How to verify the correctness of the control scheme more effectively on the ground is the key to the problem. [0003] In addition to mathematical simulation, the ground test verification work also includes physical simulation. The difference between physical simulation and mathematical simulation is that in physical simulation, the real components of the satellite need to be connected, and some simulators are used to simulate various states of the satellite in orbit. This kind of simulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04B7/185
Inventor 王胜刚姚宁王哲周剑敏曹永梅张欣
Owner BEIJING INST OF CONTROL ENG