Numerical control vertical lathe servo system sliding mode control method and system based on multi-objective optimization

The invention relates to a numerical control vertical lathe servo system sliding mode control method and system based on multi-objective optimization, and the method comprises the following steps: designing a new sliding mode control law based on a nonlinear uncertain system state equation of a servo system, and constructing a sliding mode controller model; constructing a servo system multi-target evaluation mechanism according to the system error information and the step response performance index; corresponding preference information is set according to the control requirement of the operation state of the servo system to adjust the weight coefficient of the multi-objective optimization algorithm, and the optimal control parameter is solved by using the improved multi-objective optimization algorithm; and substituting the optimal control parameters into a sliding mode controller to obtain control information at the moment, and controlling the servo system. According to the invention, online real-time adjust