光机结构的轴向一致性可控方法研究

Investigation of Controllable Axial Conformity for Opto-Mechanical Structure

针对轴向预载随结构的热变形改变而导致光机系统特性失效的设计难点,提出了一种光机结构轴向一致性可控方法。建立光机结构的热效应模型,分析热变形与轴向预载的关系,通过与传统轴向压紧结构的热分析比较,设计了一种轴向预载与温度变形一致可控的挠性构件;对不同结构参数挠性构件的变形分析表明,所设计的挠性构件在温度变化时具有很高的轴向变形可控性;建立了轴向变形量Δδ与挠性构件参数的数学模型,给出具体结构参数的设计方法。将所研究的挠性构件引入星模拟器的结构设计中,实际测试结果表明光机系统具有很好的常温特性,验证了所提光机结构轴向一致性可控方法的有效性。

In order to sovle design difficulties about failure of opto-mechanical system features due to axial pre-loading caused by thermal deformation,a controlled design method with axial conformity for opto-mechanical structure is proposed.The relationship between the thermal deformation and axial pre-loading is got based on the analysis of the thermal effect model.By comparing with the thermal analysis in the conventional axial pressure structure,a flexible element with controllable conformity between the axial pre-load and the thermal deformation is designed.The deformation analysis of the flexible elements with various model parameters showed that there is controllable conformity for the axial thermal deformation when the temperature is changed.A practice design method is given to built a model to calculate the axial thermal deformation and parameters for the flexible element.The controlled design method of axial conformity is used to design the construction of the star simulator.The measured results reveal that the method is feasible and effective.