A Guidance Method Based on Circle Involute Constrained Angle of Attack

Abstract

The invention discloses an attack angle constraint guidance strategy based on an involute of a circle. The attack angle constraint guidance strategy comprises the following steps: establishing a mathematical model of intercepting a static target by a missile in a two-dimensional plane; designing a guidance strategy based on an involute of a circle, dividing the guidance process into two stages, wherein in the first stage, a geometric guidance law based on the involute of the circle is designed, so that a missile meets attack angle constraints at the end point of the involute, and in the secondstage, a proportional guidance law is applied to achieve accurate strike on a target; solving geometric parameters of the involute according to initial conditions of the missile and the target, checking the solved parameters, and reserving effective parameters; and determining a switching strategy of the two-stage guidance law based on the expected attack angle deviation. According to the method,the geometric method design is adopted. The analytical form of the guidance parameters can be directly obtained. The linearization of the model is not needed. The applicability of the guidance systemis improved.

Description

technical field [0001] The invention belongs to the design field of missile guidance systems, and in particular relates to an attack angle constraint guidance method based on a circular involute. Background technique [0002] At present, the guidance law design for the flight constraint of zero miss is relatively simple, the design method is mature, and has been widely used. However, with the substantial improvement of the target's defense capability, the guidance method that simply considers the constraint of zero miss amount can no longer meet the demand. For example, the front of most modern tanks uses composite armor, which is difficult to penetrate from the front. At this time, hitting the weak top armor vertically will greatly improve the killing effect. Such application scenarios put forward new requirements for guidance law design, that is, it is necessary to design a guidance method with attack angle constraints. [0003] In recent years, the guidance law with att...

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Problems solved by technology

However, these existing methods usually require a complicated design process, or need to linearize the mathematical models of the missile and the target, or require more guidance measurement information, which brings certain challenges to the guidance law design and engineering application. Conservative

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