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Time-varying nonlinear ground physical similarity simulation method for space interception process

A simulation method and similarity technology, applied in the field of aerospace technology ground simulation experiments, can solve the problems of high simulation accuracy requirements and lack of practical feasibility of ground physical simulation, and achieve the effect of reducing accuracy requirements and improving engineering achievability.

Inactive Publication Date: 2020-06-16
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

In the article published by scholar Zhang Haolong, the physical simulation method of the high-speed interception process of the spacecraft adopts the deterministic space-time ratio relationship. The disadvantage of this method is that the simulation accuracy is too high, and it does not have the actual feasibility of ground physical simulation.

Method used

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  • Time-varying nonlinear ground physical similarity simulation method for space interception process
  • Time-varying nonlinear ground physical similarity simulation method for space interception process
  • Time-varying nonlinear ground physical similarity simulation method for space interception process

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Embodiment 1

[0097] Embodiment 1: During the relative approach process of two space vehicles intercepting at high speed, the distance between the two space vehicles is finally close to within 10m range from 20km, and the magnitude of change range of the distance is 10 3 , and the relative flight speed of the two aircraft is close to Mach 20. However, the maximum length of available space for ground simulation is only about 10m, and the maximum speed of ground floating body simulator is only about 350mm / s. In the following, the traditional linear steady-state similarity method and the time-varying nonlinear similarity method proposed by the present invention will be implemented and compared respectively.

[0098] Assume that the relative distance between the target aircraft and the intercepting aircraft in space at the initial moment of simulation is 20km, and the speeds are v Tx =-6300m / s, v Mx =7000m / s, and the relative distance between them is 10m at this time.

[0099] Considering th...

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Abstract

The invention relates to a time-varying nonlinear ground physical similarity simulation method for a space interception process. High-speed motion components of two aircrafts are mapped into constant-value or uniform-speed motion through nonlinear transformation, and only remaining low-speed relative motion parts are simulated on the ground. The available space and the capacity of an executing mechanism in ground physical simulation can be fully utilized, so that the precision requirement of ground simulation is lowered, and good engineering realizability is achieved.

Description

technical field [0001] The invention is a time-varying nonlinear physical similarity simulation method proposed for the ground physical simulation of the high-speed interception process of a space vehicle, and belongs to the field of ground simulation experiments of aerospace technology. Background technique [0002] With the development of space high-speed aircraft technology, the high-speed interception technology of space vehicles has become an important means of space offensive and defensive confrontation in the future. Due to the high requirements on the guidance and control of the aircraft during the interception process of this high-speed aircraft in space, the ground physical simulation experiment before the actual flight test has become an important means to test the interception effect of the space aircraft, which is of great importance to reduce the risk and cost of the experiment. important practical application value. [0003] Space vehicle ground simulation te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 卢晓东崔涛辛佳宁周军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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