A stability region research for the strapdown guidance system based on miss distance constraint

In order to propose the reasonable isolation index requirements for strapdown guidance system that contains disturbance rejection rate parasitical loop in missile general design, a method was proposed to determine the guidance stability region based on miss distance constraint. Firstly, the reasons that disturbance rejection rate parasitical loop generated in the strapdown array radar seeker were analyzed, and a dynamic model was established for the guidance systems that contain disturbance rejection rate parasitical loop. Then Routh criterion and adjoint method was used to determine the stability region of guidance system under the miss distance constraint, to analyze the influence of guidance parameters on guidance system stability region, and the stable approximate solution and the analytical boundary were obtained for the guidance system under miss distance constraint. Finally, the adjoint method was used to simulate and verify the guidance stability region of guidance system under miss distance constraint. The results show that stability region of guidance system based on miss distance constraint meets the miss distance constraint, this method can be used to guide missile overall index distribution and selection of guidance parameters for engineer of guidance.