Projectile Guidance Using Magnetic Field Sensing for Roll Determination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Medium-caliber projectiles face challenges in final phase guidance due to limited installation volume and the inability to accurately determine their position in space during free fall, leading to suboptimal target engagement.
Innovation Solution
Each projectile is individually guided using a magnetic field sensor and additional information to determine its absolute roll position, with the direction of the earth's magnetic field being impressed upon the projectile, allowing for precise correction impulses to be triggered based on a guide beam and correction impulse engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If seekers with inertial sensors are installed for accurate guidance, then measurement precision is improved, but device complexity and installation volume increase beyond what medium-caliber ammunition can accommodate
Solution Approach 1:
The patent extracts the magnetic field sensor from the complex inertial sensor system, keeping only the essential magnetic field detection capability. This simplified sensor approach provides sufficient position determination accuracy without requiring the bulky inertial measurement units, thereby reducing installation volume while maintaining measurement precision for medium-caliber ammunition guidance
Solution Approach 2:
The patent replaces mechanical/inertial sensing systems with a magnetic field-based sensing system. By using magnetic field sensors to detect the earth's magnetic field direction and determine projectile position and orientation, the system eliminates the need for complex mechanical inertial sensors, reducing device complexity and installation volume while achieving accurate measurement
2Reliability
If individual projectile correction is implemented, then hit probability is improved, but device complexity and information processing requirements increase
Solution Approach 1:
The patent implements preliminary imprinting of the earth's magnetic field direction onto each projectile during the tempering process. This pre-loaded magnetic field reference information is stored on the projectile itself, eliminating the need for complex real-time information processing during flight. The projectile can independently determine its position and trigger correction impulses based on this pre-imprinted data, achieving individual correction with simplified device complexity
Solution Approach 2:
The patent enables each projectile to independently determine its own position and trigger its own correction impulses using the pre-imprinted magnetic field information. The evaluation device on each projectile autonomously processes the magnetic field sensor data and activates the correction impulse engine when needed, without requiring complex external control systems, thereby improving hit probability while keeping device complexity manageable
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 method enhances the hit probability by enabling individual projectile correction, ensuring accurate trajectory alignment with the target, even in the absence of gravitational force, thereby optimizing target engagement.
Implementation Method 1
a magnetic field sensor and additional information to determine its absolute roll position
Implementation Method 2
at least one ejection element (5) as a correction impulse engine (6)
Data Source
AI summary
To achieve high accuracy, especially during bursts of fire (continuous fire, rapid single fire), each individual piece of ammunition (1) is addressed separately. This is achieved using the principle of beam guidance for terminally oriented guided ammunition (1). Each piece of ammunition (1) reads only the guide beam designated for that specific ammunition (1) and, based on additional information, can determine its absolute roll in space, thus ensuring the correct activation of the correction thruster (6).