The Research Of The Adjustment For Deployable Truss Antenna Reflector Based On Space Thermal Environment

The large deployable antenna in satellites has high flexibility and strong sensitivity to temperature. Antenna always enters into and leaves the earth shadow periodically when it orbits the earth, and it is affected by the shadows of itself. So the structure will induce larger thermal deformation, it induces that the service behaviour of the deployable truss antenna reflector go beyond an index. So, it is very important to adjust and optimize the preloading of antenna in thermal environment.The main research object in this paper is to adjust and optimize antenna reflector. The content of this paper can be divided into four parts as follows. firstly, the temperature of the four sites for antenna is calculated out, then the finite element model can be built by ANSYS software; after adding preloading and each moment temperature, the antenna reflector can be analysed; According to simulating anneal algorithm theory, the programs have being compiled ,they are used to optimize and adjust the preloading for the antenna in four sites, these preloading is took to other sites to check calculation; secondly, the antenna is calculated and analysed with ANSYS for the deployable antenna which embedded into NiTi Shape Memory Alloys and at the different site.Finally, by comparing with optimizing preloading and antenna embedded into SMA , a conclusion might come into being. According to the discussion in the paper, the RMS of the deployable antenna which the SMA are integrated into and optimizing preloading is diminished. So SMA are embedded in the deployable antenna and optimizing preloading can control its precision.