Truss antenna reflector deployment dynamics modeling method based on multi-body analysis test

Abstract

The invention provides a truss antenna reflector deployment dynamics modeling method based on a multi-body analysis test. The method comprises the following steps of performing a reflector deployment test to obtain force, force moment and stress data of key measuring points; building multi-body dynamics simulation software; optimizing the multi-body dynamics simulation software according to the comparison of a multi-body dynamics simulation analysis result of the force, force moment and stress of key measuring points with a deployment test result; analyzing the reasonability of the satellite attitude change physical process according to the comparison result; building an equivalent mass unit, and performing calculation to obtain corresponding databases and inertia time variant and stress time variant simplified dynamic models required by satellite control system design, test and analysis simulation software; and comparing a three-axis attitude angle and a three-axis attitude angular velocity which are obtained through simulation analysis of the satellite control system design, test and analysis simulation software with a three-axis attitude angle and a three-axis attitude angular velocity which are obtained by the multi-body dynamics simulation software, and re-checking the simplified models and the databases and judging whether the engineering properties are met or not according to the comparison result.

Description

technical field [0001] The present invention relates to a truss antenna reflector deployment dynamics and control method based on a multi-body analysis test, in particular to a truss antenna reflector deployment dynamics modeling method based on a multi-body analysis test, belonging to spacecraft dynamics and field of control technology. Background technique [0002] The space-borne flexible multi-body truss-type mesh antenna is mainly composed of large and small extension arms, reflectors and focal plane feed arrays. The expansion of the space-borne large-scale truss mesh antenna includes the expansion of the large and small 1. After the small extension arm is unfolded, the reflector is started to unfold, and the reflector is unfolded under the action of the coil spring. At the same time, the two driving motors installed on the antenna start to recover the cable (also called the driving rope) at the same time. When the coil spring driving torque When it is equal to the res...

AI Technical Summary

Problems solved by technology

[0003] In the design of the space-borne truss-type mesh antenna, in order to ensure the safety of the deployment process of the flexible multi-body truss-type mesh antenna, especially during the deployment of the large antenna reflector, all truss rods, hinges, cables, and mesh cables With sufficient stress margin, the multi-body dynamics simulation analysis required for the design and development of the flexible multi-body truss-type mesh antenna structure and the deployment test of the large and small extension arms and reflectors of the large antenna are carried out, but the large antenna of the control system cannot be provided. Deployment Mode Reflector Deployment Stage Controller Design Test Analysis Simplified dynamic model of spaceborne truss-type mesh antenna reflector deployment process. The success or failure of the reflector deployment process directly affects the success or failure of the satellite. Control system design test simulation software The real-time requirements are high, and it is not allowed to copy the complex model of reflector deployment to calculate the dynamics of multi-body systems. In the control system design and test simulation software, how to model thousands of components during the reflector deployment process, the drive of the reflector How to model the force and driving torque, there are no papers and patents with relevant research results

Images