Roll/Nod Gimbal DIRCM for MANPADS Response
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Solution Overview
Problem
Current DIRCM systems for commercial aircraft are inadequate in responding quickly and reliably to MANPADS threats, particularly at close range and during multiple simultaneous shots, due to limitations in detection range, false-alarm rates, power consumption, and the inability to effectively counter advanced threats with UV/visible seekers, while also being costly and prone to mechanical failures.
Innovation Solution
A high-power, agile DIRCM system utilizing a two-color missile warning system, continuous fiber path for laser transmission, and a Roll/Nod gimbal with off-axis laser transmitters to enhance detection range, reduce false alarms, and incorporate UV/visible laser capabilities, allowing for rapid threat engagement and reduced mechanical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional DIRCM systems use single-color infrared detection, then the system is simpler and cheaper, but the detection range is limited and false-alarm rate increases
Solution Approach 1:
The detection system is segmented into multiple independent color channels (first color and second color detectors) that operate simultaneously. Each detector captures specific spectral information, allowing the system to achieve extended detection range through multi-color analysis while maintaining manageable complexity through modular architecture.
Solution Approach 2:
The dual-color detection system serves multiple functions: the first color detector identifies potential threats, the second color detector verifies and reduces false alarms, and together they provide extended detection range. This multi-functional approach allows a single system to perform detection, verification, and discrimination tasks that would otherwise require separate systems.
2Speed
If the DIRCM system responds quickly to close-range MANPADS threats, then the probability of success increases, but the system becomes more complex and power consumption increases
Solution Approach 1:
The system performs preliminary detection and verification actions by continuously monitoring both color channels before a threat actually engages. The dual-color detectors are always ready to identify and verify threats immediately upon detection, enabling rapid response to close-range MANPADS while the preliminary verification step actually reduces false alarms rather than adding delay.
Solution Approach 2:
The system dynamically adjusts its response based on the detected threat characteristics. When the first color detector identifies a potential threat, the second color detector immediately verifies, and the system can rapidly transition to countermeasure engagement based on the verified threat assessment, optimizing response time while maintaining system simplicity through conditional logic.
3Power
If the DIRCM system uses high-power laser transmission, then the jamming effectiveness increases, but the aerodynamic drag and power consumption increase
Solution Approach 1:
The laser transmission system applies high power locally only where needed - through the specific optical path and transmitter components directed at the threat. The high-power laser is transmitted only through the necessary optical elements and at the moment of engagement, rather than continuously, thereby achieving effective jamming while minimizing overall power consumption and aerodynamic drag.
4Adaptability or versatility
If the DIRCM system incorporates UV/visible laser capabilities for advanced threats, then the adaptability to sophisticated missiles increases, but the device complexity and cost increase
Solution Approach 1:
The system incorporates both first color (infrared) and second color (UV/visible) laser transmitters in a single integrated platform, enabling it to counter both traditional infrared-guided MANPADS and advanced UV/visible seekers. This multi-functional capability provides adaptability to various threat types while the integrated architecture manages complexity by combining multiple functions in one system rather than requiring separate systems.
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
The system achieves low false-alarm rates, increased detection range, and high reliability, enabling effective countermeasures against MANPADS and advanced threats with improved response times and reduced aerodynamic drag, while being cost-effective and exportable.
Implementation Method 1
the DIRCM system must detect, verify, track and then emit a modulated laser beam 26
Implementation Method 2
The laser is optically coupled to the laser transmitter through a fiber optic cable 76
Implementation Method 3
Each sensor covers a 120° field of view and has a high resolution to discriminate threats from clutter
Implementation Method 4
The MWS supplies its measurements to the system processor, which evaluates the signals
Implementation Method 5
The FTS locks on to and tracks the threat, and continuously slews the gimbal so that it remains pointed at the incoming missile
Implementation Method 6
The DIRCM system is particularly stressed when the shot is taken from close range such as might be the case on take-off or landing or when multiple simultaneous shots are taken at the aircraft
Data Source
AI summary
An agile, high-power, reliable DIRCM system that is easily extended to address sophisticated UV or UV-visible capable multi-band threats includes a missile warner having missile warning receivers (MWRs), one or two-color suitably in the mid-IR range, that detect likely missile launch and pass the threat coordinates to a pointer-tracker having a Roll/Nod gimbal on which the IR laser transmitter is mounted. The pointer-tracker slews the gimbal to initiate tracking based on the threat coordinates and then uses its detector to continue to track and verify the threat. If the threat is verified, the pointer-tracker engages the laser to fire and jam the missile's IR seeker. By slewing the gimbal based on unverified threat coordinates to initiate tracking the system is highly agile and can respond to short and near simultaneous MANPADS shots.