In order to reduce power consumption of electric power steering system in new energy pure electric vehicles

a power optimization control strategy based on an improved bacterial foraging optimization（IBFO）algorithm is proposed.The dynamic model and vehicle model of the electric power steering system are established

and the convergence speed and precision of the algorithm are improved by improving the trending and migration operation of the BFO algorithm.The integral function of time multiplied absolute value of error is used to evaluate the convergence of the BFO algorithm.The MATLAB/SIMULINK simulation and hardware-in-the-loop test are performed separately.The test results show that the IBFO algorithm controller can reduce power of booster motor more effectively and reduce power consumption of the booster motor during steering.