Linear Motor Translator for Helicopter Rotor Control
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Solution Overview
Problem
Existing helicopter designs rely on manual cables and linkages for controlling rotor blades, which are inefficient and not adaptable to modern fly-by-wire systems.
Innovation Solution
A linear motor translator assembly for an electromagnetic actuator, comprising a cylindrical housing, a tubular body with permanent magnets, and an end cap, which translates linearly to control rotor blades, replacing manual systems with a more efficient electromagnetic actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual cables and linkages are used to control rotor blades, then the mechanical connection is simple and direct, but the system is inefficient and incompatible with modern fly-by-wire designs
Solution Approach 1:
The patent replaces manual cable and linkage systems with an electromagnetic actuator system that uses electromagnetic fields to generate linear motion. The motor assembly converts electrical signals from fly-by-wire systems into mechanical movement, eliminating the need for direct mechanical cable connections while maintaining control functionality.
Solution Approach 2:
The control system is divided into separate functional modules: the electromagnetic motor assembly, the translator assembly, and the control electronics. This segmentation allows the electromagnetic actuator to interface with fly-by-wire systems while the mechanical translator component provides the necessary linear motion output, resolving the conflict between electrical control and mechanical actuation.
2Measurement precision
If electromagnetic actuators are implemented to enable fly-by-wire control, then control precision and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent merges the electromagnetic motor assembly with the translator assembly into a single integrated unit. The motor's linear motion directly drives the translator component, combining the electromagnetic actuation mechanism and the mechanical translation function into one compact assembly, thereby reducing overall system complexity despite the advanced functionality.
Solution Approach 2:
The electromagnetic actuator assembly is designed to perform multiple functions: it receives electrical control signals, converts them to linear mechanical motion, and directly actuates the rotor blade control surfaces. This multi-functionality reduces the need for separate components and simplifies the overall control system architecture.
3Productivity
If manual cable systems are used, then the mechanical structure is straightforward, but the system lacks efficiency and responsiveness
Solution Approach 1:
The patent substitutes the inefficient manual cable pull system with an electromagnetic motor that actively generates controlled linear motion. This electromagnetic actuation provides superior efficiency and responsiveness by directly converting electrical energy to mechanical work, eliminating the passive cable tension system.
Solution Approach 2:
The electromagnetic actuator provides dynamic, electronically controllable motion with precise speed and position control, replacing the static, manually operated cable system. The motor can rapidly adjust its output to respond to pilot inputs and flight conditions, significantly improving control efficiency and responsiveness.
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
Enables precise and efficient control of rotor blades, enhancing flight dynamics and reducing mechanical complexity, facilitating a transition to fly-by-wire designs.
Implementation Method 1
linear motor translator assembly located partially within the housing assembly. The linear motor translator assembly includes a tubular body having a plurality of permanent magnets
Implementation Method 2
The plurality of electromagnetic windings are radially outward from the plurality of permanent magnets
Data Source
AI summary
According to one embodiment, linear motor translator assembly for use in an electromagnetic actuator is provided. The linear motor translator assembly includes: a cylindrical housing having a first end, a second end opposite the first end, a flanged portion at the second end, and a blind hole initiating at the second end and extending into the cylindrical housing to a blind hole base; a tubular body located within the blind hole, the tubular body including a plurality of permanent magnets; and an end cap securely fastened to the flanged portion.