计算发动机活塞连杆运动规律，速度，加速度，受力分析，以及轴承载荷图。-Calculate the movement of the engine piston rod, velocity, acceleration, force analysis, and bearing load diagram.

代码基于matlab，来源于哈工大机械原理课程设计，应用于机械传动的设计与开发(The code is based on MATLAB, which comes from the design of Harbin Engineering University mechanical principle course and applied to the design and development of mechanical transmission.)