Hybrid Thermal Mitigation Control for Energetic Material Compartments
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Solution Overview
Problem
Existing systems face challenges in mitigating hazardous reactions in environments containing energetic materials when subjected to unplanned stimuli, particularly in complex integrated weapon systems and launch systems, where collateral damage and uncontrolled initiations can occur due to thermal threats, exceeding safety standards like MIL-STD-2105D.
Innovation Solution
A hybrid sensor system with both passive and active sensors is used to detect thermal threats, activating a power source and mitigation controller to initiate specific mitigation actions or techniques in different regions of the environment, such as venting, controlled burns, or component cutting, ensuring compliance with less violent energetic responses like Type V or Type VI reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mitigation system is implemented in integrated weapon systems with multiple sub-assemblies containing energetic materials, then safety and compliance with MIL-STD-2105D standards are improved, but device complexity increases due to the need for multiple sensors and region-specific mitigation actions
Solution Approach 1:
The weapon system is divided into multiple regions, each with its own sensor and mitigation controller. This segmentation allows independent monitoring and mitigation of each region containing energetic materials, ensuring comprehensive safety coverage while managing complexity through modular design. Each region can be independently controlled to meet MIL-STD-2105D standards without requiring system-wide complexity.
Solution Approach 2:
A universal mitigation controller is implemented that can execute multiple types of mitigation actions (venting, controlled burns, component cutting) across different regions. This multi-functional approach allows a single controller design to handle various sub-assemblies with different energetic materials (solid and liquid), reducing the need for region-specific custom controllers and managing overall system complexity.
2Measurement precision
If passive and active sensors are used to detect thermal threats in the environment, then detection precision and reliability are improved, but device complexity and power requirements increase
Solution Approach 1:
Passive temperature sensors and active thermal sensors are merged into a unified sensor network under a single mitigation controller. The passive sensors provide continuous thermal monitoring without power requirements, while active sensors provide enhanced detection precision when needed. This combination leverages the strengths of both sensor types while sharing control infrastructure, improving overall detection precision without proportionally increasing complexity.
3Reliability
If region-specific mitigation actions are executed in containerized launch systems, then compliance with energetic response standards is improved, but the canister may prohibit or hinder activation of mitigation subsystems
Solution Approach 1:
Mitigation subsystems are pre-configured and pre-positioned within the canisterized launch system during manufacturing. Sensors are pre-installed in strategic locations, and mitigation actuators (venting ports, burn chambers, cutting mechanisms) are pre-integrated into the canister structure. This preliminary action ensures that when thermal threats are detected, mitigation can be immediately activated without requiring complex real-time configuration or assembly, overcoming the space constraints of containerized systems.
4Adaptability or versatility
If multiple mitigation techniques are prepared for different regions and reaction types, then adaptability to various thermal threats is improved, but device complexity and control difficulty increase
Solution Approach 1:
The mitigation controller implements dynamic selection of mitigation techniques based on real-time sensor data and threat assessment. Rather than requiring manual configuration or fixed pre-programming for each scenario, the system dynamically determines the appropriate mitigation action (venting, controlled burn, component cutting) based on the detected thermal threat characteristics, region affected, and type of energetic material present. This dynamic adaptability reduces control complexity by automating the decision-making process.
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 effectively minimizes the probability of uncontrolled initiations and collateral damage by executing region-specific mitigation actions, ensuring that energetic responses meet military safety standards with reduced ejecta kinetic energy, even in containerized launch systems.
Implementation Method 1
The mitigation control system includes a hybrid sensor system having both passive and active sensors that are used to detect thermal threats in an environment containing an energetic material
Implementation Method 2
When the abnormal temperature exceeds a predetermined threshold indicating that the environment is subject to unplanned external stimuli causing a thermal threat, the abnormal temperature sensor mechanically triggers a power source
Implementation Method 3
If the analysis indicates that mitigation is necessary, a power supply is activated and a fire pulse may be generated to initiate a mitigation energetic, such as a linear shape charge
Data Source
AI summary
A mitigation control system, for performing an active hazard mitigation method, is arranged in an environment containing an energetic material and includes an abnormal temperature sensor for detecting an abnormal temperature of the environment, a power source that is mechanically actuated by the abnormal temperature sensor when the abnormal temperature exceeds a predetermined abnormal temperature threshold, a mitigation controller that is actuated by the power source, and a plurality of local temperature sensors that are communicatively coupled to the mitigation controller and are arranged for detecting critical temperatures in specific regions of the environment. The mitigation controller executes a mitigation action when one of the critical temperatures exceeds a predetermined critical temperature threshold for the corresponding specific region.