Resolution method for equivalent simulation of spacecraft kinematics characteristics by unmanned aerial vehicle

By establishing a model of the relationship between time and space scaling and deriving dimensionless numbers, and using unmanned aerial vehicles to simulate the orbital motion of spacecraft, the problem that ground simulation systems cannot meet the actual motion requirements of spacecraft is solved, and efficient and safe spacecraft kinematic simulation is achieved.

CN121389340AActive Publication Date: 2026-01-23NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202511975563.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-25
Publication Date
2026-01-23
Estimated Expiration
2045-12-25

AI Technical Summary

Technical Problem

Existing technologies are insufficient to accurately simulate the orbital motion of spacecraft in ground-based simulation systems, especially in terms of spatial distance and speed, which cannot meet actual requirements.

Method used

By establishing a reasonable model of time and space scaling relationship, and using Buckingham Pi theorem, dimensionless numbers and scaling factors are derived. Combined with the kinematic characteristics of UAVs, an equivalent simulation of the motion process of spacecraft by UAVs is achieved.

Benefits of technology

It enables high-precision simulation of spacecraft orbital motion on UAVs, solving the problem of insufficient space in ground-based experimental systems to meet the actual operation process, and improving the safety, economy and efficiency of simulation.

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Abstract

The invention discloses a resolving method for equivalent simulation of spacecraft kinematics characteristics by an unmanned aerial vehicle, which comprises the following steps of: constructing an inertial coordinate system and a satellite orbit coordinate system required by an equivalent model, and establishing a relative motion equation in the orbit coordinate system; determining spacecraft orbit kinematics parameters and unmanned aerial vehicle equivalent kinematics parameters according to the equation; a dimension matrix is listed in combination with the basic dimensions of the parameters, and the number of basic parameters describing the physical process is determined according to a matrix rank; on the basis of the similarity between a model and a prototype, similar conditions are applied to dimensionless numbers, an equation is established to describe two systems, and then scale factors of kinematics parameters are deduced. According to the method, the controllable characteristics of the flight height, the flight speed and the vertical climbing / descending speed of the unmanned aerial vehicle are fully utilized, a reasonable space-time scaling criterion is formulated, and the kinematics characteristics of a spacecraft and the flight control technology of the unmanned aerial vehicle are fused, so that simulation of the unmanned aerial vehicle on the satellite motion process is realized.
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