Design Of Mechanical And Electrical System For The High Resolution Two-Dimension And Real Time Magnetograph Of The NVST

The New Vacuum Solar Telescope of Yunnan Observatories(the NVST,for short)is the most excellent active solar telescope of our country and is considered as one of the three best global solar observation system.The NVST can provide the high resolution image approaching to diffraction limit and multi-bands spectral image in solar active region,and one-dimensional magnetic field measurement which based on grating spectrometer is currently available.However,lack of the high spatial and temporal resolution magnetic measurement is the short board of the NVST.To compensate for this weaknesses,a high resolution two dimensions and real time magnetograph is developed.The error analysis,structural system design,electromechanical control system design and alignment and assembly scheme is researched in this thesis based on the analysis of the actual situation,and an electromechanical system is designed for the NVST high resolution two-dimension and real time magnetograph.Zeeman effect,as the fundamental theory of solar magnetic field measurement,is introduced at the first in chapter 2,and then it is discussed whether horizontal or vertical assembly plan is selected as the overall design project of the NVST magnetograph.The error factors which may influencing the precision of magnetograph is also being analyzed in chapter 2.In chapter 3,the vertical assembly structural system is designed.Also,a multidimensional adjustable design,floating support,three dimensional adjustable and the CCD attitude adjustable support design are discussed.The reliability and robustness of the structural system is simulated by ANSYS.In chapter 4,combined with control system design requirements,MCU chip type,components of drive system,load efficiencies of motor are selected and calculated.And we did an experiment of control principle verification,which proves the control system reliable.In chapter 5,an installation and adjustment scheme of the NVST magnetograph is being researched.And the deformation on load about the terminal instruments derotator platform of the NVST is researched which can be used as a reference for horizontal adjustment.laser light source,natural light source,platform static and platform rotation two groups influence factors is put forward toassist to complete the alignment of the NVST magnetograph.Meanwhile,the influence factors can be separated through four groups of working conditions,which can be improved as closed loop control system in the near future.In this thesis,the NVST magnetograph electromechanical system,which can switching observation of magnetic field measurement and spectral measurement by switching the meagnetograph position,is designed.Since the Lyot filter and most of lens have not been delivered,the accurate details design is not available.But the structural design,mechanical simulation and optical simulation can be used to design the initial accuracy,which are used as the design method of the magnetograph design.