Aircraft Monitor Housing Emergency Power Control
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Solution Overview
Problem
Conventional monitor housing apparatuses in aircraft require a gearbox with a high gear ratio or a powerful motor to deploy monitors against the force of a flat spiral spring, and the use of capacitors for emergency power supply is hindered by age deterioration due to prolonged charging voltage.
Innovation Solution
A monitor housing apparatus with a drive motor, power supply, capacitor, detector, and voltage application controller that applies voltage to the capacitor only when the monitor is deployed, allowing the capacitor to supply emergency power and extending its service life without increasing structural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage is continuously applied to the capacitor for emergency power supply, then the capacitor can reliably supply power during emergencies, but the capacitor performance deteriorates due to age deterioration from prolonged charging
Solution Approach 1:
The patent applies voltage to the capacitor periodically rather than continuously. The voltage application controller activates the capacitor only when the monitor is in the open state (needing emergency stowage capability) and deactivates it when the monitor is closed. This periodic charging approach maintains emergency power supply reliability while significantly reducing cumulative charging time, thereby extending capacitor service life and preventing performance deterioration.
2Force
If a gearbox with high gear ratio or powerful motor is used to deploy the monitor against the flat spiral spring force, then the monitor can be deployed, but the device complexity and power requirements increase
Solution Approach 1:
The patent replaces the conventional mechanical approach (gearbox with high gear ratio or powerful motor) with an electrical approach using a capacitor-driven motor. The flat spiral spring provides the stowage force mechanically, while the capacitor supplies concentrated electrical energy to the motor for deployment. This substitution reduces mechanical complexity by eliminating the need for high-ratio gearboxes while maintaining the ability to overcome the spring force through electrical energy storage and release.
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 apparatus ensures reliable stowage of monitors during emergencies by minimizing the duration of voltage application to the capacitor, thereby extending its service life and simplifying the structure.
Implementation Method 1
The capacitor supplies the drive motor with power in the event that the supply of power from the power supply to the drive motor is shut off
Implementation Method 2
When the monitor is deployed, the force of the opening monitor winds the flat spiral spring, so during an emergency the repulsive force of the flat spiral spring is used to stow the monitor in the overhead portion
Data Source
AI summary
A monitor housing apparatus comprises an opening and closing mechanism, a drive motor, a power supply, a backup capacitor, a contact switch, and a controller. The opening and closing mechanism turns a monitor around a rotation shaft. The power supply supplies electrical power to the drive motor. The backup capacitor supplies power to the drive motor in the event that the supply of power from the power supply to the drive motor is shut off. The controller applies voltage to the backup capacitor when the contact switch detects that the monitor is in its deployed state, and halts the application of voltage from the power supply to the backup capacitor when the contact switch detects that the monitor is in its stowed state.