Friction force modeling method of electromechanical system and application thereof

The invention discloses a friction force modeling method of an electromechanical system and application thereof, and belongs to the field of electromechanical system dynamics analys. The modeling method comprises the steps that a speed threshold value is set, when the speed of the electromechanical system is between a speed zero point and the speed threshold value, linear fitting is conducted on friction force of the electromechanical system, and a low-speed-section friction model is obtained; and when the speed of the electromechanical system is greater than a speed threshold value, nonlinear fitting is carried out on the friction force of the electromechanical system to obtain a high-speed section friction model. Aiming at the condition that the direction and size of friction force at the position where the speed of the electromechanical system is zero are uncertain, a speed threshold value is set, and linear fitting is carried out between the speed zero point and the threshold value; aiming at the viscous