| In recent years, with the widespread use and rapid development of infrared Fourier transform spectrometer in many specific areas (space, vacuum), environmental factors made very high demands on the reliability of movement mechanism and the lifetime of moving parts. The first chapter introduces the development of infrared Fourier transform spectrometer and the research background of moving mirror mechanical scanning system, and determines the content of this thesis, which is fully compliant moving mirror system, combined with the actual needs of the research project. Starting from the researching task, the second chapter analyzes the relevant parameters of Fourier transform spectrometer based on Michelson interferometer, which includes information capacity,coupling displacement of moving mirror, etc, and determines the basic working condition of moving mirror. Flexible supporting mechanism is core of moving mirror mechanical scanning system. According to the state, kinematics Principle of flexible supporting mechanism and the types and patterns of soft section are studied specifically and deeply. Combined with the compensation theory of flexible supporting mechanism, a new full flexible supporting mechanism with dual compensation rod is designed, and the two-dimensional drawings of CAD and the three-dimensional model diagram of SOLIDWORKS are given. In the third chapter, the finite element mesh models based on the three-dimensional model of full flexible supporting mechanism are established by the analysis software of PATRAN and NASTRAN. According to the working principle of moving mirror, through its static analysis of CAD and continuous feedback and optimization to the relevant parameters of flexible supporting mechanism, ultimately, gets a better simulative result. Compared with similar flexible supporting mechanism at home and abroad, the result shows that the accuracy of this full flexible supporting mechanism, respectively, higher than 93.2% and 75.3%. Soft sections are the weakest parts at the result of full flexible supporting mechanism. With the simulation analysis of fatigue broken to them, its simulation life cycle number is calculated, and it is 5.83x10~5 times, at the range of Nf (1x10~5 ~ 1x10~7), a high fatigue category. Through the theoretical simulation to the full flexible supporting mechanism, the reasonableness of its parameters is verified, and then the understanding of situation about its lifetime is deepened. In the fourth chapter, a simple moving mirror system is designed and made, use the parameters of the optimized result. And then do the related experimental tests on it, the error analysis about results of these tests, to verify that the relevant parameters of the full flexible supporting mechanism are feasibility and the theoretical analysis about the whole mechanism is correct, from the actual test area. In the fifth chapter, mainly around the simulation and experimental results of the moving mirror system, the full flexible supporting mechanism with practical application environment is analyzed and summarized, to put forward a number of proposals and ideas, and lay the foundation for future research. |
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