Weapon Guidance Plane Control for Range and Impact Vector Accuracy
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Solution Overview
Problem
Current guidance solutions for glide weapons do not account for energy usage, leading to inefficient energy consumption and reduced range due to excessive maneuvering, which is particularly problematic for glide weapons relying on kinetic and geopotential energy.
Innovation Solution
A method involving the definition of a guidance plane where the impact and line of sight vectors lie, with guidance commands to align the velocity vector perpendicular to this plane, using proportional navigation guidance to optimize flight path angles and maintain dynamic pressure, ensuring efficient energy use and extended range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional guidance solutions are used to guide the weapon to impact from a specific direction, then the impact direction accuracy is improved, but the energy usage increases significantly
Solution Approach 1:
The invention changes the guidance parameter from direct three-dimensional angle control to a two-stage approach: first controlling the flight path angle to maximize gliding range, then using proportional navigation within a defined guidance plane. This parameter transformation reduces energy consumption while achieving the desired impact direction through sequential control rather than simultaneous multi-dimensional control.
2Measurement precision
If the weapon maneuvers to achieve the desired impact direction, then the impact angle accuracy is improved, but the range is reduced
Solution Approach 1:
The guidance problem is segmented into two independent stages: (1) flight path angle control to maximize range by optimizing the glide trajectory, and (2) proportional navigation within a defined guidance plane to achieve precise impact direction. This segmentation allows each stage to optimize its specific function without compromising the other, thereby maintaining both range and impact accuracy.
Solution Approach 2:
The invention reduces the three-dimensional guidance problem to a two-dimensional problem by defining a guidance plane containing both the line of sight vector and impact vector. By constraining maneuvers to this plane and using proportional navigation in two dimensions, the system achieves precise impact direction control with reduced energy expenditure compared to full three-dimensional maneuvering.
3Measurement precision
If aggressive maneuvering is performed to achieve precise impact vector, then the impact precision is improved, but the energy efficiency deteriorates
Solution Approach 1:
The flight path angle is determined in advance to maximize gliding range before the proportional navigation phase begins. This preliminary optimization of the glide trajectory ensures that the weapon reaches the target area with maximum energy efficiency, reducing the need for aggressive maneuvers during the terminal phase and thereby improving overall energy efficiency while maintaining impact precision.
Data Source
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AI summary
A method for guiding a weapon to a target, the method comprising: obtaining a required impact vector for the weapon at the target; obtaining a line of sight (LOS) vector from the weapon to the target; determining a velocity vector of the weapon; defining a guidance plane, the guidance plane being a plane in which both the impact vector and the LOS vector lie; generating guidance commands for the weapon to place the velocity vector of the weapon in the guidance plane with a velocity perpendicular to the guidance plane of zero.