Modeling and Validation of a Passive Truss-Link Mechanism for Deployable Structures Considering Friction Compensation with Response Surface Methods

Abstract

In this study, a passive truss-link mechanism applicable to large-scale deployable structures was designed to achieve successful deployment in space. First, we simplified the selected truss-link mechanisms to the two-dimensional geometry and calculated the degrees of freedom (DOF) to determine whether a kinematic over-constraint occurs. The dimensions of the truss-link structure were determined through a deployment kinematic analysis. Second, a deployment simulation with the truss-link was conducted using multibody dynamics (MBD) software. Finally, a deployment test was performed considering gravity compensation, and the results were compared with those of MBD simulation. The results of the deployment simulations were confirmed to be slightly faster than those of the deployment test due to friction effects existing in the joints and gravity compensation devices. To address this issue, inverse identification of the equivalent frictional torque (EFT) at the revolute joints in the deployment test was conducted through response surface methods (RSM) combined with the central composite design technique. As a result, we confirmed that the deployment angle history of the deployment simulation was similar to that of the deployment test.

Design and Analysis of Active Speed-Limit Mechanism for Large-Scale Spatial Solar Array

“…However, this deployable process could significantly impact the spacecraft or Solar Array Drive Assembly (hereafter referred to as SADA), leading to satellite attitude being out of control or SADA damage, in severe cases, leading to mission failure [5]. Therefore, for solar arrays, especially large ones, considering the relationship between deployable reliability and reduction of deployment impact is critical to ensure the reliable operation of the spacecraft in orbit [6][7][8][9].…”

Optimisation design of a large space cable-pole tensioned parabolic cylindrical antenna mechanism

“…[1][2][3] The outstanding characteristics of parabolic cylindrical antennas have broad application prospects in space-to-Earth observation, celestial observation and other fields, which make them a major topic in antenna research. [4][5][6] The optimum design of pole system of a large space cable-strut tensioned parabolic cylindrical antenna is an important part of the design process. Choi et al 6 identified the equivalent friction moment of rotating joints in deployment tests by the response surface method and central composite design technology to solve the problem of the friction effect in joints and gravity compensation devices.…”

“…[4][5][6] The optimum design of pole system of a large space cable-strut tensioned parabolic cylindrical antenna is an important part of the design process. Choi et al 6 identified the equivalent friction moment of rotating joints in deployment tests by the response surface method and central composite design technology to solve the problem of the friction effect in joints and gravity compensation devices. Gao et al 7 used the response surface method to establish the response surface of the hysteresis loss factor of the general rotary hinge.…”

“…1–3 The outstanding characteristics of parabolic cylindrical antennas have broad application prospects in space-to-Earth observation, celestial observation and other fields, which make them a major topic in antenna research. 4–6…”