Reference sight angle signal-based design method of multi-constraint terminal guidance law

Abstract

The invention discloses a reference sight angle signal-based design method of a multi-constraint terminal guidance law. The design method comprises the following steps: a guidance model of a guided missile and a static target in a horizontal plane is built, and a sight angle second-order dynamic equation is obtained; a reference sight angle signal is designed based on a quartic function of time, and unknown parameters in the reference sight angle signal are solved through boundary conditions, attack time and angle constraints; a guided missile advance angle kinetic equation is built to obtainthe reference sight angle signal expected to be tracked under a view field constraint of a guidance head; and the multi-constraint terminal guidance law is obtained based on an error model. The tracking reference sight angle signal-based method is adopted; no model linearization hypothesis exists; the residual flight time does not need to be estimated; and the method is suitable for a terminal guidance task with attack time, attack angle and guidance head view field constraints, and has relatively high applicability and relatively high reliability.

Description

technical field [0001] The invention belongs to the design field of missile guidance systems, and in particular relates to a design method of a multi-constraint terminal guidance law based on reference line-of-sight angle signals. Background technique [0002] With the rapid development of military equipment technology, the technical means of using traditional guidance methods to strike targets is relatively conservative. For example, the new protective layer equipped on ground tanks has greatly improved its own defense capabilities, thus making it difficult for missiles to destroy tanks. In response to this challenge, the effective technical means is to achieve a vertical strike on the tank, because the tank cockpit is a relatively weak protective layer. However, the traditional guidance law only considers the zero miss amount and cannot realize the vertical attack constraint, which requires the study of the terminal guidance law with the attack angle constraint. In addit...

AI Technical Summary

Problems solved by technology

However, relatively little research has been done on this technique

At the same time, it needs to be mentioned that most of the existing terminal guidance methods with attack time constraints need to rely on the estimated information of the remaining flight time, or need to linearize the mathematical model of the missile and the target. The guidance method creates a certain conservatism, which also reduces applicability and reliability

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