Magnetic Load Generating Unit for Actuator Testing
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Solution Overview
Problem
Conventional load simulators for actuators are complex, costly, and introduce unnecessary inertia, making it difficult to generate a load profile where displacement and load directions match, particularly in applications like thruster systems, which increases system complexity and test costs.
Innovation Solution
A load generating unit using a configuration of permanent magnets and a ferromagnetic body to simulate a load profile through magnetic forces, minimizing inertia and system complexity by arranging permanent magnets and a ferromagnetic body in series, with a link connecting to the actuator, allowing for precise control of the load profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional load simulators are used to generate load profiles, then actuators can be tested, but the device complexity and cost increase significantly
Solution Approach 1:
The patent replaces complex mechanical load simulation systems with a magnetic field-based system. Permanent magnets generate magnetic forces that directly apply load to the actuator through magnetic interaction, eliminating the need for complex mechanical linkages, springs, or hydraulic systems while maintaining reliable actuator testing capability
Solution Approach 2:
The patent changes the fundamental parameter of load application from mechanical force transmission to magnetic field interaction. By adjusting magnet positions, polarities, and configurations, different load profiles can be generated without changing the physical structure, thereby reducing device complexity while preserving testing reliability
2Reliability
If conventional load simulators are used to generate load profiles, then actuators can be tested, but the cost increases significantly
Solution Approach 1:
The patent substitutes expensive mechanical components (hydraulic systems, mechanical linkages, precision mechanisms) with relatively simple permanent magnets and magnetic circuits. This substitution dramatically reduces manufacturing cost while maintaining the reliability of actuator testing through magnetic force application
Solution Approach 2:
The patent employs permanent magnets which are relatively inexpensive, simple to manufacture, and can be easily replaced if needed. The magnetic field generation system is far more cost-effective than conventional mechanical or hydraulic load simulation systems, reducing overall manufacturing cost while preserving testing capability
3Reliability
If conventional load simulators are used to generate load profiles, then actuators can be tested, but unnecessary inertia is added to the actuator
Solution Approach 1:
The patent replaces mechanical coupling mechanisms that add significant inertia with a magnetic field-based coupling system. The magnetic interaction between permanent magnets and the actuator creates load forces without requiring physical mass, thereby minimizing added inertia while maintaining reliable testing capability
Solution Approach 2:
The patent extracts and eliminates the unnecessary mechanical components that contribute to inertia from the load simulation system. By using only permanent magnets and magnetic fields to generate load forces, the system removes extraneous mass while preserving the essential function of actuator testing
4Adaptability or versatility
If conventional load simulators are used to generate matching load profiles, then actuators can be tested, but the system complexity increases
Solution Approach 1:
The patent enables different load profiles to be generated by changing magnetic field parameters such as magnet positions, polarities, and configurations. This parameter-based control allows versatile load profile generation without increasing physical system complexity, as the same magnetic structure can produce different load characteristics through parameter adjustment
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 solution significantly reduces test costs and risks by simulating a linear relationship between displacement and load, minimizing actuator inertia, and enabling accurate performance evaluation of actuators in applications like thruster systems with a more concise and efficient configuration.
Implementation Method 1
a third permanent magnet and a first link passing through central axes of the first permanent magnet and the second permanent magnet to be penetrated to a central axis of the third permanent magnet and be connected to the actuator, wherein the third permanent magnet and the link are displaced in the length direction of the first link by a magnetic force
Data Source
AI summary
The present invention provides a load generating unit for testing an actuator, the unit including a first permanent magnet and a second permanent magnet spaced apart from each other; a third permanent magnet or a ferromagnetic body arranged in a row with the first permanent magnet and the second permanent magnet between the first permanent magnet and the second permanent magnet; and a first link passing through central axes of the first permanent magnet and the second permanent magnet to be penetrated to a central axis of the third permanent magnet and be connected to the actuator, wherein the third permanent magnet and the link are displaced in a length direction of the first link by a magnetic force. According to the present invention, the complexity, cost, and inertia of a device may be overcome and a load profile may be easily generated.