Haptic Feedback Rendering With Wideband Resonance Vibration
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Solution Overview
Problem
Conventional force feedback devices are limited in outputting high-frequency vibrations, struggling to provide realistic tactile experiences due to their vibration output speed of 1 kHz, making it difficult to simulate high-bandwidth touch interactions in virtual training simulations.
Innovation Solution
A force and complex vibration rendering system incorporating a haptic device and a wideband resonance actuator, which classifies vibration signals into different frequency bands and applies them through both the haptic device and the wideband resonance actuator to provide reaction force and wide-bandwidth vibration, utilizing a neural network model to calculate realistic vibration signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional force feedback device is used, then the device structure is simple, but the vibration output speed is limited to 1 kHz making it difficult to output high-frequency vibrations over 500 Hz
Solution Approach 1:
The patent combines a force feedback device and a wideband resonance actuator into a single haptic device system. The force feedback device handles low-frequency vibrations (below 500 Hz) while the wideband resonance actuator handles high-frequency vibrations (500 Hz and above), merging their capabilities to achieve full-bandwidth vibration output exceeding 1 kHz without excessive complexity
Solution Approach 2:
The vibration output range is segmented into two frequency bands: low-frequency vibrations (below 500 Hz) handled by the force feedback device and high-frequency vibrations (500 Hz and above) handled by the wideband resonance actuator. This segmentation allows each component to operate within its optimal frequency range, achieving overall high-speed vibration output
2Reliability
If a conventional force feedback device is used, then the device complexity is low, but the tactile feedback is insufficient for realistic touch simulation in virtual simulations
Solution Approach 1:
The system merges a force feedback device and a wideband resonance actuator to provide comprehensive tactile feedback. The force feedback device provides reaction force and low-frequency vibration while the wideband resonance actuator adds high-frequency vibration, combining to create realistic touch feedback that mimics actual physical interactions in virtual simulations
Solution Approach 2:
The system changes the vibration frequency parameter by using two actuators with different operating ranges. The force feedback device operates below 500 Hz while the wideband resonance actuator operates at 500 Hz and above, together covering the full frequency spectrum needed for realistic tactile feedback
3Speed
If only a force feedback device is used, then the system is simple, but it is difficult to output vibration over 200 Hz in accordance with the intended signal
Solution Approach 1:
The vibration frequency range is segmented into two parts: below 500 Hz handled by the force feedback device and 500 Hz and above handled by the wideband resonance actuator. This segmentation enables the system to accurately output vibrations across the entire frequency spectrum including frequencies over 200 Hz that cannot be achieved by the force feedback device alone
Solution Approach 2:
The system dynamically switches between two actuator configurations based on frequency requirements. The force feedback device and wideband resonance actuator work in coordination, with the wideband resonance actuator activated for high-frequency signals above 500 Hz, enabling accurate vibration output across varying frequency demands
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 the provision of more realistic touch feedback by outputting vibrations at speeds higher than conventional force feedback devices, effectively simulating collisions in virtual simulations with enhanced bandwidth, thereby improving the tactile experience in virtual training environments.
Implementation Method 1
a wideband resonance actuator installed at the haptic device and configured to output vibration at an output speed different from an output speed of vibration that is generated at the haptic device
Data Source
AI summary
The present disclosure relates to a force and complex vibration rendering system using a force feedback device and a wideband resonance actuator, and a method for providing force and complex vibration using the system. The force and complex vibration rendering system includes: a haptic device configured to be operated by a user to input an operation signal and configured to be able to provide reaction force or vibration to the user; a wideband resonance actuator installed at the haptic device and configured to output vibration at an output speed different from an output speed of vibration that is generated at the haptic device; an image provider configured to create and provide a virtual image, which includes at least one target object and an instrument object that is moved in correspondence to an operation signal input to an operation member, to the user; and a touch provider configured to calculate reaction force and vibration, which are generated at the instrument object when the instrument object collides with the target object in the virtual image, and control the haptic device and the wideband resonance actuator such that the calculated reaction force and vibration are applied to the user.The force and complex vibration rendering system using a force feedback device and a wideband resonance actuator and a method for providing force and complex vibration using the system provide not only reaction force but wide bandwidth vibration to a user when a collision situation occurs in virtual simulation through a wideband resonance actuator that generates vibration at an output speed higher than a vibration output speed of the force feedback device of the haptic device, so the system and method have an advantage that it is possible to provide more real touch feedback to the user.