Single-Stage Cycloidal Gearbox Solar Array Actuator
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Solution Overview
Problem
Conventional actuator systems for positioning solar arrays to face the sun are complex, costly, and inefficient due to their structural configurations and require specialized parts, limiting their versatility and ability to achieve high reduction ratios.
Innovation Solution
A single-stage cycloidal gearbox actuator system that includes a motor and a single-stage cycloidal gearbox with a drive shaft, input gear, and output gear, capable of reducing input speed to output speed by a factor of at least 60 within a single rotation, using a simple configuration with readily available parts and minimizing customization needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mechanical actuator systems are used to position solar arrays, then the solar arrays can be positioned to face the sun, but the structure becomes complex and production costs increase due to the increased number of parts
Solution Approach 1:
The actuator system is divided into distinct functional modules: a motor assembly and a cycloidal gearbox assembly. This segmentation allows each module to be optimized independently while simplifying the overall structure compared to conventional integrated systems.
Solution Approach 2:
The motor and cycloidal gearbox are operatively coupled in an integrated assembly that combines the driving function and speed reduction function into a single compact unit, reducing the number of separate components needed while maintaining positioning reliability.
2Reliability
If conventional actuator systems with complex structures are used, then solar arrays can be positioned, but production costs increase due to the increased number of parts
Solution Approach 1:
The cycloidal gearbox design uses standard, readily available parts that can serve multiple functions within the system. The same gearbox structure provides both speed reduction and torque multiplication, eliminating the need for specialized single-function components that increase production costs.
Solution Approach 2:
The actuator system employs standard off-the-shelf motor and gearbox components rather than custom-engineered parts, significantly reducing manufacturing costs while maintaining sufficient reliability for the application lifecycle.
3Reliability
If conventional positioning actuators with complex structural configurations are used, then solar arrays can be positioned, but efficiency decreases due to structural configurations
Solution Approach 1:
The system replaces complex multi-stage mechanical gear trains with a cycloidal gearbox mechanism that achieves the same speed reduction and torque multiplication through a more efficient single-stage mechanical action, improving positioning efficiency.
4Manufacturing precision
If conventional actuators such as harmonic drive actuators are used, then a narrow range of reduction ratios can be achieved, but versatility is limited due to the specialized nature of parts
Solution Approach 1:
The cycloidal gearbox design allows for easy adjustment of the speed reduction ratio by changing the number of teeth on the input and output gears or modifying the eccentricity of the cycloidal motion, providing versatility across a wide range of reduction ratios without requiring specialized parts.
Solution Approach 2:
The same basic cycloidal gearbox structure can be adapted to provide different reduction ratios by simple parameter adjustments, making the actuator system versatile for different solar array sizes and positioning requirements without needing specialized components for each application.
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 single-stage cycloidal gearbox actuator system achieves high efficiency and cost-effectiveness by reducing complexity and production costs, enabling versatile and efficient solar array positioning with a simplified structure, unlike conventional systems that require multiple gear stages or specialized harmonic drive gearboxes.
Implementation Method 1
The single-stage cycloidal gearbox is configured to reduce the first input speed to the second output speed within a single rotation of the drive shaft
Implementation Method 2
the single-stage cycloidal gearbox actuator system achieves high efficiency and cost-effectiveness by reducing complexity and production costs, enabling versatile and efficient solar array positioning
Implementation Method 3
a motor and a single-stage cycloidal gearbox operatively coupled to the motor. The single-stage cycloidal gearbox includes a drive shaft rotationally coupled to the motor which is configured to rotate the drive shaft about a drive axis at a first input speed
Data Source
AI summary
An actuator for positioning a solar array to track the sun includes a motor and a single-stage cycloidal gearbox operatively coupled to the motor. The single-stage cycloidal gearbox includes a drive shaft rotationally coupled to the motor to rotate the drive shaft about a drive axis at a first input speed, an input gear coupled to and driven by the drive shaft, and an output gear configured to be engaged and driven by the input gear at a second output speed. The single-stage cycloidal gearbox is configured to reduce the first input speed to the second output speed within a single rotation of the drive shaft. The first speed is reduced to the second speed by a factor of at least 60 within the single rotation of the drive shaft.