To establish an accurate target track model for capturing both the flight states and real movement characteristics

a new method to generate a target track based on the variable parameter control is proposed in the hardware-in-loop simulation system for photoelectric countermeasures. On the basis of the flight control principle

a flight dynamic model is regarded as a control object，then function models of proportional parameters and differential parameters are constructed on analyzing the characteristics of flight track control. By making the control error as the independent variable of the model

it can modify its parameters to adapt the nonlinear trait during the course of track control and to reduce the track error. Finally

a mathematical simulation is carried out by taking airplane data as examples. Compared with the setting track

the largest relative error of distance is 3.9% and the steady-state relative error of distance is 0.1%. Moreover

the largest relative error of tracking course is 1.8%

and its steady-state relative error is 0.056% .The simulation results validate the universality of the method and show that the model can meet the need of target track simulation in simulation systems.