Parallelogram Motion Platform for Compact Multi-Axis Haptic Force Feedback
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Solution Overview
Problem
Current haptic feedback technologies in virtual and augmented reality lack effective means to transmit forces to users, limiting the immersive experience and presence in virtual environments.
Innovation Solution
A motion platform and haptic feedback device with a linkage assembly connecting a static and dynamic platform, allowing for relative motion and force transmission, combined with a platform connection element for thumb and index finger interaction, providing high stiffness, compact structure, and good dynamic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional haptic feedback technologies are used, then the structure can be simple, but the ability to transmit forces to users is insufficient
Solution Approach 1:
The motion platform is segmented into multiple independent degrees of freedom, with each degree of freedom equipped with its own drive mechanism (motor 1, motor 2, etc.). This segmentation allows force transmission in multiple directions independently, enhancing the overall force transmission capability while keeping each individual drive unit relatively simple.
Solution Approach 2:
The patent transitions from traditional single-axis or limited-axis haptic feedback to a multi-degree-of-freedom motion platform that can transmit forces in multiple spatial dimensions. This dimensional expansion enables more realistic and immersive haptic feedback by simulating complex force vectors from virtual environments.
2Force
If a motion platform with linkage assembly is used, then force transmission capability is improved, but the device size increases
Solution Approach 1:
The linkage mechanisms for different degrees of freedom are merged and integrated into a compact arrangement. The connection between the static platform and dynamic platform incorporates multiple linkage mechanisms that share common structural elements, reducing the overall volume while maintaining force transmission capability.
Solution Approach 2:
The drive mechanisms and linkage assemblies are nested within each other in a space-efficient manner. Motors, linkages, and support structures are arranged in nested configurations where components of one degree of freedom are positioned within or alongside components of other degrees of freedom, minimizing the device's external dimensions.
3Reliability
If multiple motion platforms are combined for finger interaction, then haptic feedback realism is enhanced, but the system complexity increases
Solution Approach 1:
Each motion platform is designed with universal functionality to support multiple types of haptic interactions (pinching, rubbing, pressing, etc.). The platforms can independently control the positions of multiple fingers, and through coordinated operation, achieve various interaction scenarios, reducing the need for separate specialized mechanisms for each interaction type.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor the positions and forces of multiple fingers in real-time, allowing the control system to adjust the motion platforms' operations dynamically. This feedback loop enhances haptic feedback realism by adapting to user interactions while maintaining manageable system complexity through intelligent control algorithms.
Data Source
AI summary
This application discloses a motion platform, a haptic feedback device, and a human-computer interactive system. The motion platform includes a first platform, a second platform and a linkage assembly, the first platform and the second platform being connected by the linkage assembly, the second platform being configured to move relative to the first platform. The first platform comprises a first power take-off and a second power take-off, the first power take-off comprising a first output shaft and the second power take-off comprising a second output shaft. The linkage assembly comprises a first parallelogram linkage mechanism and a second parallelogram linkage mechanism connected to each other, and a two-bar linkage mechanism. The two-bar linkage mechanism and the first parallelogram linkage mechanism have the same plane of motion, and the second output shaft being configured to drive motion of the two-bar linkage mechanism.