MATLAB的SIMULINK子库是一个建模、分析各种物理和数学系统的软件，它用框图表示系统的各个环节，用带方向的连线表示各环节的输入输出关系。-MATLAB SIMULINK sub library is a modeling and analyzing all kinds of physical and mathematical system software, it uses the block diagram representation of all aspects of the system, with the direction of the line indicating the relationship between input and output of each link.