Aircraft Brake Update Rate Detection System
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Solution Overview
Problem
Aircraft brake control systems face the challenge of determining the refresh rate of different braking signal components, such as nominal and anti-lock braking signals, which are updated at varying rates, necessitating a system to differentiate and manage these rates for optimal brake actuation and wear reduction.
Innovation Solution
A force command update rate detection system comprising a variation detector and a similarity detector, connected in parallel to the signal input, identifies the update rate of brake actuation instructions, allowing the electrical brake actuation controller to transmit force commands at appropriate rates, distinguishing between high and low update rates to filter signals accordingly and manage brake wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the brake actuation controller updates the brake actuator at a high update rate to respond critically during anti-skid operations, then the response speed is improved, but the brake wear increases
Solution Approach 1:
The system dynamically adjusts the brake actuator update rate based on the detected command update rate. When high update rate commands are detected (anti-skid operations), the system increases the actuator update rate to match, ensuring critical response. When low update rate commands are detected (normal operations), the system reduces the actuator update rate to minimize wear. This dynamic adaptation resolves the contradiction between response speed and service life.
Solution Approach 2:
The system changes the operational parameter (update rate) of the brake actuator based on the detected signal characteristics. By monitoring the update rate of incoming brake commands and adjusting the actuator update rate accordingly, the system optimizes performance for different operating conditions - high update rates for anti-skid events and low update rates for normal braking, thus balancing response speed and component longevity.
2Measurement precision
If the system detects and differentiates between different braking signal update rates, then the brake control precision is improved, but the system complexity increases
Solution Approach 1:
The system replaces complex mechanical or hardware-based rate detection mechanisms with electronic signal processing. The update rate detector uses software-based analysis of incoming brake command signals to determine their update rates, avoiding the need for additional physical sensors or complex detection hardware. This substitution maintains high detection precision while minimizing system complexity.
Solution Approach 2:
The update rate detector is integrated into the existing brake actuation controller, allowing the same controller to perform both brake force calculation and update rate detection functions. This multi-functionality approach avoids adding separate dedicated detection hardware, thereby improving measurement precision through accurate rate detection while keeping the overall system complexity manageable through component consolidation.
Data Source
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AI summary
The present disclosure relates to rate detection components, and more particularly, to a rate detection system that determines the update rate of commands. The update rate of the commands may be determined in response to the incidence of similarities and differences among samples of the commands.