Multi-process constraint and multi-terminal constraint terminal guidance law based on generalized target control miss distance concept

Abstract

The invention discloses a multi-process constraint and multi-terminal constraint terminal guidance law based on a generalized target control miss distance concept. The multi-process constraint and multi-terminal constraint terminal guidance law comprises the following steps that 1, stored standard control and an aircraft state initial value are uploaded; 2, a ballistic integral is predicated; 3, process constraints are corrected; 4, a target control trajectory one-order variational model is solved; 5, replacement criteria control is solved. Compared with a traditional terminal guidance law, the guidance law can meet the traditional terminal constraint requirements for the miss distance, the falling angle, the falling point attack angle and the like, a strong-nonlinearity state variable V can be restrained to a needed value, and meanwhile the process constraints can be processed in a loop-locked mode.

Description

technical field [0001] The invention relates to a multi-process constrained and multi-terminal constrained terminal guidance law based on the concept of generalized standard control miss amount, and belongs to the fields of aerospace technology and weapon technology. Background technique [0002] Hypersonic aircraft refers to aircraft with a flight Mach number greater than or equal to 5. It has unique characteristics such as fast flight speed, strong defense penetration capability, global reach, and high damage power. The multi-constraint terminal guidance law of downcompression section is an important factor to determine its combat effectiveness. [0003] At the end of the flight of a hypersonic vehicle, in order to increase the penetration capability, it is often required to press down with a larger ballistic inclination, which means that the required overload at the end is relatively large; while the speed of the aircraft is high and the height is high, then Means it has...

AI Technical Summary

Problems solved by technology

[0004] The display guidance laws commonly used in terminal guidance (such as proportional guidance, generalized display guidance, etc.) are often based on a linearized geometric trajectory model that ignores velocity changes, and the trajectory is finally converged to the desired target through control methods. However, these guidance laws have no method to meet the requirements of precise control of falling speed

although there is a terminal velocity consideration in the reentry guidance law, the near vertical strike requirement of the terminal segment makes the reentry guidance law inapplicable

Moreover, these guidance laws often do not have closed-loop considerations in advance when considering process constraints, and it is easy to fail to hit the target when the control capability is insufficient

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