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为了提高伺服压力机传动系统的动态特性,建立了曲柄肘杆传动系统的结构简图,运用矢量方程法建立了该机构的几何参数数学模型,然后根据等效转动惯量的转换条件建立了该系统的等效转动惯量数学方程,最后通过MATLAB软件建立了该系统的数学模型,分析得出该机构在主滑块不同行程长度时所对应的等效转动惯量幅值曲线,并分析了在伺服电机恒扭矩输出时曲柄的加减速性能。分析结果表明,通过减小该机构的主滑块行程长度,可以明显减小转动惯量,提高曲柄的角加速度,从而提高该系统的动态性能。
In order to improve the dynamic characteristics of the servo press transmission system, the structure of the crankshaft toggle joint transmission system is established. The mathematical model of geometric parameters of the mechanism is established by using the vector equation method. Then, the system is established according to the transformation conditions of equivalent moment of inertia The mathematical equations of the equivalent moment of inertia are established. Finally, the mathematic model of the system is established by MATLAB software, the corresponding amplitude curve of equivalent moment of inertia corresponding to different stroke lengths of the main slider is analyzed, Acceleration and deceleration performance of crank at constant torque output. The analysis results show that by reducing the stroke length of the main slider of the mechanism, the moment of inertia can be significantly reduced and the angular acceleration of the crank can be increased, so as to improve the dynamic performance of the system.