Dual Radar Processing for Vertical Landing Guidance
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Solution Overview
Problem
Existing radar systems are inefficient for guiding vertical takeoff or landing craft due to high descent speeds and the need for high precision, which is not met by current systems designed for low descent slopes and speeds, posing safety and cost concerns, especially when landing in inhabited areas.
Innovation Solution
A method using dual radar processing, one for horizontal plane guidance and another applying the inverse synthetic antenna principle for high-resolution vertical axis guidance, combined with beacon systems for precise location and attitude determination, to control the craft's trajectory and ensure safe, precise landing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional radar systems are used for guiding vertical takeoff or landing craft, then the system design is simple and cost-effective, but the measurement precision and reliability are insufficient due to high descent speeds
Solution Approach 1:
The radar guidance system is divided into two independent processing chains: a first radar processing for horizontal plane guidance and a second radar processing for vertical axis guidance. Each processing chain operates independently to estimate trajectory disparities in its respective plane, allowing the system to achieve high precision in both dimensions without requiring a single overly complex processing system.
Solution Approach 2:
The invention extends the radar guidance approach from traditional two-dimensional horizontal plane monitoring to three-dimensional space by adding vertical axis estimation through inverse synthetic antenna processing. This dimensional extension enables precise tracking of vertical takeoff and landing craft throughout their entire flight path.
2Measurement precision
If radar systems with large dimensions and high emission power are used to detect long-range targets, then the detection range is sufficient, but the system becomes expensive and unwieldy to implement
Solution Approach 1:
The radar system separates horizontal and vertical processing functions into independent chains, allowing each to be optimized for its specific purpose with appropriately sized antennas and processing power, rather than requiring a single large-scale system for all functions.
Solution Approach 2:
The dual processing radar system is designed to handle multiple guidance scenarios (horizontal approach, vertical descent, combined trajectories) within a single integrated platform, making the system adaptable to various craft types and landing conditions without requiring separate specialized systems.
3Reliability
If conventional radar processing is used for high-speed vertical descent, then the device complexity is low, but the reliability and safety are insufficient
Solution Approach 1:
By dividing the guidance system into two independent processing chains (horizontal and vertical), the invention ensures that failures in one chain do not compromise the other, thereby improving overall system reliability and safety margins for high-speed vertical landings.
Solution Approach 2:
The system continuously estimates trajectory disparities in both horizontal and vertical planes and uses this feedback to control the craft's direction of displacement, enabling real-time corrections to maintain safe and precise landing trajectories even at high descent speeds.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables precise guidance of craft at high speeds with enhanced safety and cost-effectiveness by achieving high angular resolution and location precision, reducing disparities in trajectory estimation, and ensuring zero-speed vertical landing.
Implementation Method 1
a first radar processing for locating and estimating the trajectory of the said target on the basis of measurements of radial distances, of Doppler frequency and of angles of azimuth and of angles of elevation of the said target arising from a radar signal emitted towards the said target
Implementation Method 2
measurements of radial distances, of Doppler frequency and of angles of azimuth
Data Source
AI summary
A method comprises at least: a first radar processing for locating and estimating the trajectory of a target on the basis of measurements of radial distances, of Doppler frequency and of angle of azimuth and of elevation of the target arising from a radar signal emitted towards the target; a second radar processing of location and of trajectory of the target along a vertical axis, by applying the principle of the inverse synthetic antenna; the disparity between the given trajectory and the trajectory estimated by the first processing, projected on a horizontal plane, and the disparity between the given trajectory and the trajectory estimated by the second processing according to the vertical axis being used to control the direction of displacement of the target.