Solution technology of physical characteristic model of motional cable harness in virtual environment

虚拟环境下的活动线缆物理特性模型求解技术

¹ School of Software, Northwestern Polytechnical University, Xi'an 710072, China
² The 10th Research Institute of CETC, Chengdu 610036, China

Received: 26 June 2024

Abstract

The reliability of motional cable harness on the satellite rotational platform determines the reliability of the rotational platform itself. By simulating the motion of motional cable harness on the rotational platform in a virtual environment, potential issues in the cable layout design can be identified in advance, thus ensuring the reliability of the rotational platform. The high precision and efficiency to solve the physical characteristic model of motional cable harness are the prerequisites and key to simulate the cable movement. The existing solution technology of the physical characteristic model of flexible cables are primarily based on the Levenberg-Marquardt (L-M) algorithm. However, the initial solution setting of the existing L-M algorithm relies on the experience, and the damping coefficient updates are fixed, resulting in low solution accuracy and inefficiency. Therefore, an initial solution generation method based on the catenary equation and an adaptive damping coefficient update strategy and the geometric characteristic of motional cable harness is proposed. On this basis, an improved L-M algorithm is proposed. The simulation results verify that the present algorithm outperforms the existing algorithms in terms of the solution accuracy and efficiency.

摘要

机载卫星转动平台上活动线缆的可靠性, 决定了转动平台的可靠性。通过在虚拟环境下对转动平台上活动线缆的运动过程进行模拟, 能够提前发现活动线缆布线设计问题, 进而保证了转动平台的可靠性。活动线缆物理特性模型的高精度和高效率求解, 是模拟活动线缆运动的前提和关键。现有的活动线缆物理特性模型求解技术主要基于Levenberg-Marquardt (L-M)算法, 而现有的L-M算法初始解的设定依赖于经验, 且阻尼系数的更新固定不变, 导致解的精度不高且求解效率低下。为此, 基于活动线缆几何特征, 提出了一种基于悬链线方程的初始解生成方法和一种自适应的阻尼系数更新策略, 并在此基础上提出了改进的L-M算法。通过搭建活动线缆仿真实验平台, 验证了该算法在求解精度和求解效率方面均优于现有的算法。