Six-DOF Magnetic Motion Device Eliminates Friction Error
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Solution Overview
Problem
Existing spatial motion devices face challenges in achieving precise six-degree-of-freedom and three-dimensional movement due to error accumulation from frictional contact and limited accuracy caused by friction during object interactions.
Innovation Solution
A precise spatial motion device utilizing a motion unit with non-contact, frictionless connections between objects, employing a combination of permanent magnets and coils to generate magnetic forces for movement control, and elastic connections to stabilize and guide the movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If objects are connected in a frictional contact manner to enable six-degree-of-freedom movement, then the device can achieve spatial motion, but position and attitude errors accumulate due to friction and contact errors
Solution Approach 1:
The patent replaces the traditional mechanical contact-based six-degree-of-freedom motion mechanism with a magnetic field-based control system. Permanent magnets and coils generate magnetic forces to drive motion without physical contact, eliminating friction and contact errors that cause position and attitude inaccuracies in conventional mechanical systems
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the driving and driven components. The permanent magnets and coils create magnetic fields that transmit force without direct contact, serving as a mediator that enables six-degree-of-freedom motion while avoiding the error accumulation inherent in direct mechanical contact
2Ease of operation
If objects are driven by contact-type frictional connection, then motion can be transmitted, but friction hinders movement accuracy
Solution Approach 1:
The patent substitutes magnetic interaction for mechanical friction-based motion transmission. The permanent magnets and coils generate magnetic forces that drive the moving objects without contact, completely eliminating friction and thereby achieving high movement accuracy while maintaining ease of operation
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, non-contact, and frictionless six-degree-of-freedom and three-dimensional movement, reducing error accumulation and improving accuracy by using magnetic forces and elastic connections for stable and controlled object interaction.
Implementation Method 1
a permanent magnet unit including a plurality of permanent magnets that are disposed in x, y and z-axis directions and installed on the first driving body while facing the second driving body; a coil part including a plurality of coils that are disposed in x, y and z-axis directions and installed on the second driving body while facing the first driving body
Implementation Method 2
a connection part disposed between the first and second driving bodies and elastically connecting the first and second driving bodies to each other
Data Source
AI summary
Disclosed is a precise spatial motion device including: a motion unit including a plurality of drivers that do not contact each other and are elastically connected to each other; and a control unit that controls the drivers to drive in a six-degree-of-freedom manner and in three-dimensional space by controlling magnetic force. In accordance with the constructions of the present disclosure, the drivers are connected to each other in a non-contact and frictionless manner, and thus, driving may be performed in a six-degree-of-freedom manner and in three-dimensional space. Accordingly, position and attitude errors are not accumulated, whereby precise motion control may be achieved.