某光电稳定平台齿轮传动系统动力学分析与优化

发布时间：2019-01-08 09:34

【摘要】：在光电稳定平台传动系统中,齿轮传动作为重要的机械传动形式,其动态性能直接影响整个稳定平台结构的可靠性。针对齿轮系统非线性振动问题,本文以某光电稳定平台机械系统结构为基础,用定性和定量的方法对含有齿隙、时变啮合刚度和摩擦的齿轮传动系统的动力学特性进行了研究。本文基于某稳定平台方位伺服传动系统,采用集中质量法建立了考虑多自由度的振动及齿轮副支承系统的支承弹性的影响的齿轮传动系统动力学模型,利用MATLAB/Simulink及四阶变步长Runge-Kutta方法对系统进行建模仿真与求解,全面地分析比较了在不同参数下非线性系统的动态响应特性。根据机械系统动态优化设计理论,提出了齿轮传动系统多目标优化设计模型,优化结果表明,优化设计后的系统动态特性明显改善,验证了系统动力学模型和优化设计数学模型建立的合理性和有效性。
[Abstract]:In the photoelectric stable platform transmission system, gear transmission is an important form of mechanical transmission, its dynamic performance directly affects the reliability of the whole stable platform structure. Aiming at the problem of nonlinear vibration of gear system, the dynamic characteristics of gear transmission system with tooth gap, time-varying meshing stiffness and friction are studied by qualitative and quantitative methods based on the mechanical system structure of a photoelectric stable platform. Based on the azimuth servo transmission system of a stable platform, the dynamic model of gear transmission system considering the effect of multi-degree of freedom vibration and bearing elasticity of gear pair support system is established by means of concentrated mass method in this paper. The dynamic response characteristics of nonlinear systems with different parameters are analyzed and compared by using MATLAB/Simulink and four-order variable step size Runge-Kutta method. According to the theory of dynamic optimal design of mechanical system, the multi-objective optimization design model of gear transmission system is put forward. The optimization results show that the dynamic characteristics of the system are improved obviously after the optimization design. The rationality and validity of the system dynamics model and the mathematical model of optimal design are verified.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41

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