Aircraft Environmental Control System Adaptive Temperature Regulation
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Solution Overview
Problem
Aircraft environmental control systems, such as those on the Hawk aircraft, face challenges in responsiveness due to variations in throttle settings, which affect temperature and air flow, leading to inefficiencies in thermal control for onboard systems.
Innovation Solution
An aircraft environmental control system that includes a temperature sensor, control signal generator, memory for performance data storage, transmitter, receiver, and an update module, which uses control laws to adjust the mixing of bleed air and refrigerated air to maintain optimal temperature, with isolating mechanisms to prevent updates during flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the environmental control system uses fixed control laws to manage temperature, then the system structure remains simple, but the system cannot respond effectively to variations in throttle settings
Solution Approach 1:
The patent implements dynamic control laws that automatically adjust control parameters based on real-time throttle setting variations. The control system transitions from fixed to adaptive control by continuously monitoring throttle position and modifying control laws accordingly, enabling the system to respond effectively to operational changes without requiring complex manual reconfiguration
Solution Approach 2:
The patent changes control parameters (such as gain values, threshold settings, or control algorithm coefficients) based on throttle setting conditions. By dynamically adjusting these parameters according to the operational state, the system achieves adaptability to different throttle positions while maintaining a relatively simple overall structure
2Adaptability or versatility
If the control system continuously updates control laws during flight, then the system adapts to changing conditions, but system stability may be compromised
Solution Approach 1:
The patent performs control law updates in advance during ground operations or during safe operational windows before flight conditions become critical. By pre-adapting control laws to anticipated conditions, the system maintains stability during flight while still achieving adaptability through proactive parameter adjustment
Solution Approach 2:
The patent implements a feedback mechanism that monitors system stability indicators and conditionally updates control laws only when stability thresholds are satisfied. This feedback-controlled update approach allows the system to adapt to changing conditions while preventing updates that would compromise stability, thus balancing adaptability and reliability
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
Enhances the responsiveness and efficiency of environmental control systems by dynamically adjusting the temperature of conditioned air based on throttle settings, ensuring effective thermal management for aircraft subsystems.
Implementation Method 1
a temperature sensor configured to measure a temperature of the fluid and to generate a first signal, the first signal being indicative of the measured temperature
Implementation Method 2
a control signal generator configured to, using one or more control laws, using the first signal, generate a control signal for controlling the temperature of the fluid
Implementation Method 3
a transmitter configured to transmit, from the aircraft environmental control system, for use by one or more entities remote from the aircraft environmental control system, the performance data
Implementation Method 4
a receiver configured to receive, responsive to the transmitter transmitting the performance data, from the one or more entities remote from the aircraft environmental control system, update information
Data Source
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AI summary
An aircraft environmental control system (4) for controlling a temperature of a fluid, the control system comprising: a temperature sensor (30) configured to measure a temperature of the fluid and generate a signal indicative of that temperature; a control signal generator (52) configured to, using control laws (78) and the first signal, generate a control signal for controlling the temperature of the fluid; a memory (56) for storing performance data; a transmitter (60) configured to transmit, from the aircraft environmental control system (4), the performance data; a receiver (60) configured to receive, responsive to transmitting the performance data, update information; and an update module (58) configured to, using the update information, update the control laws (78).