长春光机所机构学研究室于1981年正式成立,但属于机构学领域内的机械动力学研究却已历经二十载。在理论分析方面,该室曾以精密光学仪器机械系统为对象进行了直流伺服电机拖动惯性负载的机械传动系统动力学的研究,此项工作中考虑了系统中杆件的弹性和非弹性阻尼对机组动力学的影响,并提出用自由振动衰减实验的方法来求得整个系统的非弹性阻尼,从而避免了直接测定系统中的动态阻尼时在实验上的困难和直接求解非线性动力学方程时在数学 Changchun Institute of Mechanics, Institute of Mechanics was formally established in 1981, but belongs to the field of mechanical mechanics research has gone through 20 years. In the theoretical analysis, the room has been a precision optical instrument mechanical system for DC servo motor drag inertial load mechanical transmission system dynamics study, this work considers the system of flexible rod and inelastic damping On the dynamics of the unit, and puts forward the method of free vibration attenuation test to obtain the inelastic damping of the whole system, so as to avoid the experimental difficulties in the direct determination of the dynamic damping in the system and to directly solve the nonlinear dynamic equation When in math