Research On Double-layer Stable Servo Control System Of Seeker

The missile-borne servo stabilization platform is mainly used to isolate the disturbance of environmental factors during missile flight.It constantly corrects the angle and position of the servo antenna frame according to the measurement information of the seeker,and keeps the precise pointing accuracy of the antenna at all times.Therefore,it is widely used in missile-borne equipment.However,due to the particularity of the missile environment,the bandwidth requirement is large,which not only ensures the high dynamic characteristics,but also needs to meet the high accuracy.Therefore,under the interference of high frequency,i.e.disturbance frequencies of 1 Hz to 5 Hz,the control of high bandwidth and high dynamic characteristics of the stabilized platform is an urgent problem to be solved.In this paper,the double-layer stabilization servo control system is deeply studied in the aspect of improving the high frequency decoupling ability of the control and stabilization platform,which provides the necessary theoretical basis and research experience for the practical application of the following missile-borne high precision and high stability stabilization platform control system.Compared with the conventional single stabilized platform,the bandwidth of the platform under high frequency disturbance has been significantly improved.Firstly,the relevant models of the single stabilized platform controller of conventional seeker are established,and the models of DC servo motor,current loop,speed loop and stabilized loop are established.According to the results of modeling and preliminary simulation,the conventional single stabilized platform can not meet the design requirements,and further bandwidth optimization design is needed.Secondly,in order to further broaden the working bandwidth of the stabilization platform,the double-layer stabilization platform is discussed;the speed loop,the predetermined loop and the stabilization loop are modeled separately;finally,the simulation experiment is carried out.Through parameter design and adjustment,the servo control system can meet and achieve the seeker’s target requirements and optimal parameter configuration for the servo platform.Finally,the control circuit is designed in detail,the circuit schematic design and the PCB circuit design are completed and put into production,and the corresponding functions are tested in kind.