Cooperative guidance for active defence based on line-of-sight constraint under a low-speed ratio

Abstract

In this study, an active defence cooperative guidance (ADCG) law that enables cheap and low-speed airborne defence missiles with low manoeuverability to accurately intercept fast and expensive attack missiles with high manoeuverability was designed to enhance the capability of aircraft for active defence. This guidance law relies on the line-of-sight (LOS) guidance method, and it realises active defence by adjusting the geometric LOS relationship involving an attack missile, a defence missile and an aircraft. We use a nonlinear integral sliding surface and an improved second-order sliding mode reaching law to design the guidance law. This can not only reduce the chattering phenomenon in the guidance command, but it can also ensure that the system can reach the sliding surface from any initial position in a finite time. Simulations were carried out to verify the proposed law using four cases: different manoeuvering modes of the aircraft, different speed ratios of the attack and defence missiles, different reaching laws applied to the ADCG law and a robustness analysis. The results show that the proposed guidance law can enable a defence missile to intercept an attack missile by simultaneously using information about the relative motions of the attack missile and the aircraft. It is also highly robust in the presence of errors and noise.

A Multi-Constraint Guidance and Maneuvering Penetration Strategy via Meta Deep Reinforcement Learning

“…and represent the LOS angular rate in the longitudinal and lateral directions, respectively. (9) Differentiating Equation ( 9) with respect to , we obtain the following: (10) Figure 1. Attack-defense model.…”

“…The above methods are of great significance for analyzing and solving the confrontation process between UAVs and interceptors. Near-space UAVs have the characteristics of high velocity and short time in the phase of attack and defense confrontation terminal guidance [10], and the differential game guidance law struggles to show advantages in this phase. Moreover, the differential game method requires a large amount of calculation, and the bilateral performance indicators are difficult to model [11]; as a result, this theory is unable to be applied in practice.…”

Multi-Constraints Guidance and Maneuvering Penetration Strategy via Meta Deep Reinforcement Learning

“…Above methods are of great significance for analyzing and solving the confrontation process between UAV and interceptor. Nearby space UAV has characteristics of high velocity and short time in the phase of attack and defense confrontation terminal guidance [10], the differential game guidance law is difficult to show advantages in this phase. Moreover, the differential game method has a large amount of calculation, bilateral performance indicators are difficult to model [11], as a result, this theory is unable to be applied in practice.…”

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…At present, the use of low-speed and constrained manoeuvrability interceptors to intercept hypersonic vehicles represents a research hotspot [33,[35][36][37][38]. A balance must be ensured between the interception accuracy and operational economic cost when establishing defence systems against hypersonic vehicles.…”

“…3. In contrast to the existing studies [33,[35][36][37][38], the conditions in which a low-cost interceptor (with a low speed and constrained manoeuvrability) can intercept a hypersonic vehicle are comprehensively analysed. By maximising the performance of low-cost interceptors in actual operational scenarios, the operational economic costs can be decreased.…”