Realistic Tactile Haptic Feedback Device Using Transfer Function Identification
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Solution Overview
Problem
Conventional haptic feedback devices fail to provide realistic tactile feedback similar to interacting with real objects and are not small, light, or cost-effective, limiting their application in remote-control systems, computer-aided design tools, educational systems, scientific equipment, and electronic devices.
Innovation Solution
A realistic tactile haptic feedback device comprising a first sensor, a digital controller, an actuator, and a second sensor, which operates in training and normal modes to identify and replicate tactile haptic features, providing users with feedback similar to real objects through a transfer function identification process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional haptic feedback devices are used, then device complexity is reduced, but tactile feedback realism deteriorates
Solution Approach 1:
The system performs preliminary training in a training mode before normal operation, where the controller learns the transfer function by sequentially generating training signals and identifying the relationship between actuator outputs and sensor inputs. This preliminary learning phase enables the system to achieve realistic tactile feedback without requiring complex real-time computation during actual use.
Solution Approach 2:
The system employs feedback mechanisms where the controller receives sensor signals from both the actuator and the real object, compares them, and adjusts the transfer function accordingly. This feedback loop allows the system to verify and refine the tactile feedback realism continuously, achieving high measurement precision through iterative improvement rather than complex initial design.
2Adaptability or versatility
If conventional haptic feedback devices are used, then device simplicity is maintained, but application versatility deteriorates
Solution Approach 1:
The system achieves universality by implementing a transfer function identification mechanism that can adapt to different objects and applications. The controller can learn and store multiple transfer functions for different scenarios (remote-control systems, computer-aided design, educational systems, scientific equipment), allowing a single device structure to serve multiple applications without requiring complex reconfiguration for each use case.
3Measurement precision
If training mode is implemented, then tactile feedback accuracy is improved, but operation time increases
Solution Approach 1:
The training mode is executed as a preliminary action before normal operation, where the controller learns the transfer function offline. Once trained, the system can operate in normal mode with high tactile feedback accuracy without requiring continuous training time. The preliminary learning phase stores the necessary information for accurate operation, reducing time loss during actual use.
Solution Approach 2:
The system can periodically retrain or update the transfer function as needed, rather than requiring continuous training. This periodic action allows the system to maintain high tactile feedback accuracy while minimizing the time spent in training mode, balancing accuracy requirements with operational efficiency.
Data Source
AI summary
A realistic tactile haptic device comprising a first vibration sensor, a digital controller, an actuator, and a similar or identical second vibration sensor, and a realistic tactile haptic feedback method thereof, provides users with realistic tactile haptic feedback that is similar to or the same as real tactile haptic feedback which users would experience by touching real objects.