Aircraft Electric Pedal Control Device Simplified Transmission
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Solution Overview
Problem
Conventional pedal control devices in aircraft have complex transmission mechanisms, making them difficult to assemble, costly, and prone to jamming due to single-point failures, which hinders weight reduction and maintenance efficiency.
Innovation Solution
An electric pedal control device with a simplified transmission mechanism using RVDT sensors and electric motors, where angular displacement information controls motor operation, and elastic connectors like springs, with a redundant design to prevent single-point failures and facilitate easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transmission mechanisms are used in pedal control devices, then the control function is achieved, but the structure becomes complicated and prone to jamming failures
Solution Approach 1:
The patent extracts and removes the complex mechanical transmission mechanism from the pedal control device, replacing it with an electric motor-driven system. This eliminates the transmission mechanism that causes jamming failures while maintaining the core control function through direct electric actuation.
Solution Approach 2:
The patent replaces the mechanical transmission mechanism with an electric motor system. The electric motor directly drives the control surface without requiring complex mechanical linkages, thereby eliminating the jamming problem inherent in mechanical transmissions while reducing overall structural complexity.
2Weight of moving object
If conventional pedal control devices are used, then the control function is provided, but the weight and manufacturing cost increase
Solution Approach 1:
The patent removes unnecessary mechanical transmission components from the pedal control device, extracting only the essential electric motor and control system. This reduction in components directly decreases weight and simplifies the manufacturing process.
Solution Approach 2:
By substituting the mechanical transmission system with an electric motor system, the patent eliminates multiple mechanical parts that contribute to weight and manufacturing complexity. The electric system requires fewer components and simpler assembly procedures.
3Productivity
If conventional transmission mechanisms are used, then the control signal is transmitted, but the maintenance cost increases and dispatch rate decreases
Solution Approach 1:
The patent extracts and eliminates the transmission mechanism that requires frequent maintenance and causes failures. By removing this vulnerable component, the system requires less maintenance and achieves higher dispatch rates due to reduced downtime.
Solution Approach 2:
Replacing the mechanical transmission system with an electric motor system eliminates the jamming failures that disrupt operations. The electric system has fewer moving parts, requires less maintenance, and improves overall system reliability, directly enhancing dispatch rate.
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 electric pedal control device reduces volume and weight, enhances maintainability, and prevents jamming failures, thereby increasing dispatch efficiency and reducing maintenance costs.
Implementation Method 1
an angular displacement sensor, and to acquire, through the angular displacement sensor, rotational position information about the pedal
Implementation Method 2
each pedal transmission assembly comprises an electric motor
Implementation Method 3
each elastic connector connects an output shaft of the corresponding electric motor
Data Source
Figure 1
AI summary
Disclosed is an electric pedal control device for an aircraft, the device comprising several pedal transmission assemblies, each of the pedal transmission assemblies comprising an electric motor (1), an elastic connector (3), a transmission mechanism, an angular displacement sensor (5), and a pedal, wherein the angular displacement sensor (5) is configured to acquire rotational position information about the pedal; transmission mechanism revolute pairs (6) of the transmission mechanisms in the pedal transmission assemblies are connected via a mechanical connecting rod mechanism (7) to effect linkage; and a controller of the electric pedal control device is configured to receive the rotational position information, and to control, according to the rotational position information, the electric motors (1) to dampen the elastic connectors (3). The electric pedal control device can simplify the transmission mechanism while reducing the volume, and it is easy to maintain, and has high reconfigurability when encountering a single point of failure, thereby helping to increase the dispatch rate.