ITAE optimal control enables the integral of time multiplied by absolute error to be the minimum in a system.ITAE has the characteristics of third-order no static errorthat isno error for uniform acceleration input.No-static-error ITAE optimal control method is simple and easy to implement in engineering.Howeveras for shipborne rocket launcher systems with time-varying parametersthe effect of directly using ITAE control is not idealbecause the parameters of the controller no longer meet the ITAE optimal transfer function due to the change of system parameters.Thereforeit is necessary to identify the system so that the parameters of the controller can change with the systems parameters.There are many methods for system identificationbut they do not meet the real-time requirements of shipborne rocket launcher.Thereforean easy-to-implement identification method is proposed in consideration of the performance requirements of weapon systems.The proposed algorithm is applied to ITAE parameter tuningand the results show that the proposed algorithm can effectively tune the parameters of ITAE controller of the servo system.