Scaling Laws of the Drag-free Control System Between Ground Model and Space Prototype

IF 1.3 4区工程技术 Q2 ENGINEERING, AEROSPACE

Microgravity Science and Technology Pub Date : 2025-08-11 DOI:10.1007/s12217-025-10183-7

Yuqi Ren, Chenglei Yue, Mingwei Chen, Bing Cui, Chu Zhang, Li Duan

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Abstract

To address issues in the construction of the ground test platform and closed-loop control performance evaluation of the drag-free system in space gravitational wave detection, this paper proposes a verification method based on a ground composite semi-physical drag-free simulation system. A ground simulator for drag-free simulation is innovatively designed based on the configuration of a drag-free satellite with two test masses. The scaling laws between the space prototype and the ground simulator are determined by using the Pi theorem. The scaling laws are used as the design guide for the ground simulator. According to the principle of the drag-free satellite in the science mode, the drag-free controller is designed using the active disturbance rejection control (ADRC) algorithm, and the control scaling laws are established for the controller design of the ground simulator. The closed-loop similarity of the two systems is studied, and the simulation results indicate that the two systems exhibit similar closed-loop dynamic behavior. The drag-free controller of the space prototype can be transferred to the ground simulator for verification using control scaling laws.

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地面模型与空间样机间无拖拽控制系统的标度规律

针对空间引力波探测中无阻系统地面测试平台搭建和闭环控制性能评估等问题，提出了一种基于地面复合半物理无阻仿真系统的验证方法。基于无拖卫星双试验质量结构，创新性地设计了无拖仿真地面模拟器。利用Pi定理确定了空间原型与地面模拟器之间的尺度规律。该比例律可作为地面模拟器设计的指导。根据科学模式下无拖曳卫星的工作原理，采用自抗扰控制（ADRC）算法设计了无拖曳控制器，建立了地面模拟器控制器设计的控制比例律。研究了两系统的闭环相似度，仿真结果表明两系统具有相似的闭环动力学行为。利用控制标度律，将空间样机的无拖拽控制器转移到地面模拟器上进行验证。

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来源期刊

Microgravity Science and Technology 工程技术-工程：宇航

CiteScore

3.50

自引率

44.40%

发文量

期刊介绍： Microgravity Science and Technology – An International Journal for Microgravity and Space Exploration Related Research is a is a peer-reviewed scientific journal concerned with all topics, experimental as well as theoretical, related to research carried out under conditions of altered gravity. Microgravity Science and Technology publishes papers dealing with studies performed on and prepared for platforms that provide real microgravity conditions (such as drop towers, parabolic flights, sounding rockets, reentry capsules and orbiting platforms), and on ground-based facilities aiming to simulate microgravity conditions on earth (such as levitrons, clinostats, random positioning machines, bed rest facilities, and micro-scale or neutral buoyancy facilities) or providing artificial gravity conditions (such as centrifuges). Data from preparatory tests, hardware and instrumentation developments, lessons learnt as well as theoretical gravity-related considerations are welcome. Included science disciplines with gravity-related topics are: − materials science − fluid mechanics − process engineering − physics − chemistry − heat and mass transfer − gravitational biology − radiation biology − exobiology and astrobiology − human physiology