Aircraft Nacelle Lock Closure Detection Using a Compressed Load Sensor
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Solution Overview
Problem
Existing locking systems for aircraft nacelles are difficult to monitor for proper closure due to their location and often require additional, costly, and heavy components to ensure they remain closed during flight.
Innovation Solution
A locking system with a buffer part and load sensor that compresses when closed, generating a signal when a threshold load is reached, allowing detection of proper closure without additional weight or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If locking systems are positioned near the ground for operational access, then ease of operation is improved, but visibility and detection of their position deteriorate
Solution Approach 1:
The patent replaces mechanical visibility solutions (oversized locking systems, visual indicators) with a sensor-based detection system. A sensor is integrated into the locking system to detect whether the cowlings are properly closed, and this information is transmitted to the flight control system. This substitution allows the locking system to remain small and ground-positioned while achieving reliable detection through electronic means rather than visual means.
2Reliability
If oversized locking systems are used to compensate for possible failure, then reliability is improved, but weight and complexity increase
Solution Approach 1:
The patent implements a feedback system where sensors continuously monitor the locking system's state and provide real-time information to the flight control system. This feedback mechanism allows for reliable detection of locking status without requiring oversized mechanical components. The system can detect and respond to locking failures through the sensor network, maintaining reliability while minimizing weight.
3Measurement precision
If inductive sensors are added to detect locking status, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the sensor system multi-functional by integrating it into the existing locking system architecture. The same sensor that detects locking status also provides feedback for control decisions. This universal approach allows precise measurement of locking status while avoiding additional complex systems, as the sensor serves multiple purposes within the existing structural framework.
Data Source
AI summary
A locking system for an aircraft nacelle is provided. The locking system includes a first portion configured to be mounted on a first part of an aircraft nacelle, and a second portion configured to be mounted on a second part of the aircraft nacelle. The locking system can be configured such that, when it is in the closed position, the first portion and the second portion are held together. The locking system further includes at least one buffer part and a load sensor joined together and configured to compress the load sensor between the buffer part and another part of the locking system when the locking system is in the closed position.