Test system for thermally induced dynamic response characteristics of large space structure

Abstract

The invention provides a test system for thermally induced dynamic response characteristics of a large space structure. The test system comprises a vacuum container, a controller, a heat sink subsystem, a test piece bracket, an infrared radiation subsystem, a transient heat flow simulation device, a laser displacement measurement subsystem and a strain measurement subsystem; the vacuum container is used for providing a space pressure environment; the heat sink subsystem is used for simulating a space cold black environment; the infrared radiation subsystem is used for simulating an external heat flow received by a test piece in orbit; the transient heat flow simulation device is used for simulating the heat flow irradiation change rate when the space structure enters and exits the earth shadow; the laser displacement measurement subsystem is used for acquiring a change curve of the vibration displacement of the test piece in different directions along with time and transmitting the change curve to the controller; and the strain measurement subsystem is used for measuring the tensile strain and the shear strain of the test piece. The test system is used for the ground test of the thermally-induced dynamic response characteristics of the large space structure, and is simple in structure and high in reliability.

Description

technical field [0001] The application relates to the technical fields of aviation and aerospace environment measurement and ground testing, and in particular to a testing system for thermally induced dynamic response characteristics of large-scale space structures. Background technique [0002] In recent years, with the continuous deepening of human exploration of the universe, the demand for multi-functional and high-performance spacecraft has led to the wide application of the structural type of assembled central cabin and expandable flexible accessories. For example, large-scale solar wing structures, space mast structures, space-on-orbit construction of large structures, large trusses, etc. This structure has the characteristics of large size, light weight, low stiffness and small heat capacity. [0003] Unlike ground structures that mainly bear gravity and mechanical loads, in the weightless environment of space, large space structures are heated and cooled by the sun...

AI Technical Summary

Problems solved by technology

However, the current spacecraft space environment simulation containers are often designed for thermal experiments of spacecraft, subsystems, and components. Although the temperature change characteristics of space structures can be simulated through pumps, large containers, and infrared simulators, they lack rapid heat flow. It is difficult to effectively evaluate the thermally induced dynamic response analog measurement system under changes

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