According to the research of satellite magnetic characteristics and magnetic test

the model of satellite multi-magnetic dipole is established

the linear part and nonlinear parts are separated

The root mean square of the difference between the simulated value and the measured value is taken as the objective function

and the genetic algorithm is used to search the position of the multi-magnetic dipoles

at the same time

the fitness error between measurements and calculations is monitored so that when the object function reaches the optimum

the fitness error can meet the requirement. At last

the magnetic properties of the satellite in static state and electrified state are calculated

the result shows that the magnetic model obtained by adopting the method is high accurate and strong robust

the error of magnetic field and magnetic moment are both less than 5%.