Guidance Method of Near Space Aircraft Interceptor Platform for High Speed Target

Aiming at hypersonic target interception, a guidance strategy based on near-space aircraft platform is proposed, which can make full use of the advantages of strong guidance correction ability, large interception coverage, multiple interceptors and reusable platform. The interception guidance scheme mainly includes four parts: trajectory prediction of near space target, hit point planning of interception prediction, middle guidance law design of high speed aircraft platform and interceptor-target terminal guidance law design. In terms of trajectory prediction, a trajectory prediction method based on the identified target acceleration model is presented. In the aspect of prediction hit point planning, an efficient search algorithm is proposed to complete prediction hit point planning. In the aspect of mid-course guidance law design, a design method of double-layer online guidance law is proposed, which can quickly plan flight trajectory online and improve the ability of mid-course guidance deviation correction. In the aspect of terminal guidance law design, a collaborative terminal guidance method satisfying the constraints of attack Angle and closed-loop attack time is presented. Simulation results show that the proposed method can provide an effective research idea for near space target interception. © 2023 China Spaceflight Society. All rights reserved.