Spacecraft autonomous rendezvous control system ground simulation test method

A technology of ground simulation and test methods, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as large differences in real space processes and reduced credibility of ground simulation verification results

Active Publication Date: 2016-11-09
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the verification of autonomous rendezvous technology, the target position is fixed or moves irregularly, which is quite different from the real space process, which will reduce the credibility of the ground simulation verification results. In order to improve the feasibility of the simulation test, it is necessary to reproduce the Absolute motion and relative motion process of spacecraft

Method used

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  • Spacecraft autonomous rendezvous control system ground simulation test method
  • Spacecraft autonomous rendezvous control system ground simulation test method
  • Spacecraft autonomous rendezvous control system ground simulation test method

Examples

Experimental program
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Embodiment 1

[0057] This embodiment intends to illustrate the running state of the ground simulator under the method proposed by the present invention through simulation.

[0058] The semi-major axis of the target spacecraft’s orbit a=6907900m, the orbital eccentricity e=0.1, the initial true perigee angle f 0 =0.5rad, the initial position X of the tracking spacecraft relative to the target spacecraft ct0 =-140m, Y ct0 =-140m, Z ct0 =20m, initial speed The side length of the ground test site is l=40m, and the ratio coefficient of the basic quantity is just like: lambda t = 1 / 10, which means that the target simulator movement distance scale is 1 / 500000 times of the target spacecraft, the ground simulator relative movement distance scale is 1 / 10 times of the space spacecraft relative movement, and the ground test time is the space real time 1 / 10 times of .

[0059] The spacecraft autonomous rendezvous controller takes the form of feedback linearization plus pole configuration:

[...

Embodiment 2

[0063] This example is intended to illustrate that under the simulation test method proposed by the present invention, the process of the omni-directional autonomous rendezvous mission can be verified.

example 2

[0064] In Example 2, the parameters of the verification object task, the parameters of the ground test system, and the similarity ratio coefficients of the corresponding physical quantities of the basic dimensions are the same as those in Example 1, and the reference trajectory of the spiral line is designed:

[0065] And design a feedback linearized tracking controller:

[0066] a x = kω 3 / 2 X c t - ω 2 X c t ...

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Abstract

Provided is a spacecraft autonomous rendezvous control system ground simulation test method, belonging to the spaceflight control ground simulation field. The method comprises the steps of: 1) determining a basic dimension corresponding physical quantity similarity ratio coefficient according to the relation between verification object task parameters and ground test system parameters; 2) according to the similarity ratio coefficient, respectively establishing kinetic equations of a target simulator and tracking simulator motion in computer simulation; 3) connecting the simulator kinetic equation, the simulator (including control), a motion measuring sensor and an autonomous rendezvous controller to form a ground test closed loop system; and 4) controlling the simulator to track the motion track solved by a kinetic equation in the computer, and reproducing a spacecraft autonomous rendezvous motion process in a ground test room. The spacecraft autonomous rendezvous control system ground simulation test method lays a theoretical foundation for an autonomous rendezvous control semi-physical simulation test, and can simultaneously reflect simulator and tracking spacecraft absolute and relative motion characteristics on the ground, and verify an omnidirectional autonomous rendezvous control task.

Description

technical field [0001] The invention belongs to the field of ground simulation for aerospace control, in particular to a simulation test method for ground verification of a spacecraft autonomous rendezvous control system. Background technique [0002] The spacecraft autonomous rendezvous technology is a very complex space technology, which requires high reliability and high precision, and puts forward strict performance requirements for the spacecraft control system. For this reason, researchers have proposed various innovative control technologies to better Reliably complete space autonomous rendezvous missions. However, before new technologies are applied to real space missions, in order to reduce mission risks and successfully complete space missions, sufficient experiments must be carried out on the ground. Space agencies at home and abroad attach great importance to the simulation tests of spacecraft on the ground. [0003] In the process of spacecraft ground simulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 贾英民孙施浩贾娇
Owner BEIHANG UNIV
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