Closed-Loop Tactile Feedback Control for Precise Haptics
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Solution Overview
Problem
Conventional electronic devices face challenges in providing advanced tactile feedback beyond simple vibrations, and existing systems lack precision and accuracy in generating varied tactile sensations.
Innovation Solution
A tactile feedback system comprising a fixed part, a movable part, and a driving assembly, where the movable part is driven to move relative to the fixed part, generating tactile feedback forces, with a control unit and sensing modules for precise motion control, including calibration processes to achieve accurate vibration feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional vibrators are used to provide tactile feedback, then the device can provide basic vibration feedback, but the system lacks precision and accuracy in generating varied tactile sensations
Solution Approach 1:
The patent implements a closed-loop feedback system where a sensing module detects the actual motion state of the movable part and feeds this information back to the control unit. The control unit compares the detected motion with the target motion and adjusts the driving assembly's output accordingly, enabling precise control of tactile feedback sensations while maintaining system stability.
Solution Approach 2:
The patent replaces conventional simple vibration mechanisms with a more sophisticated system comprising a driving assembly, sensing module, and control unit. This substitution enables precise control of the movable part's motion parameters (position, velocity, acceleration) to generate varied and accurate tactile sensations.
2Adaptability or versatility
If the movable part is driven to move relative to the fixed part to generate tactile feedback forces, then varied tactile sensations can be produced, but control accuracy and motion precision become challenging
Solution Approach 1:
The sensing module continuously monitors the movable part's actual motion parameters and feeds this data back to the control unit, which adjusts the driving assembly's control signals in real-time to correct deviations from target motion, ensuring high motion control accuracy despite the complexity of generating varied tactile sensations.
Solution Approach 2:
The system dynamically adjusts the driving assembly's operation based on real-time feedback from the sensing module. The control unit modifies control parameters (frequency, amplitude, waveform) dynamically to achieve precise motion control while generating diverse tactile sensations, adapting to different operational conditions.
3Measurement precision
If a sensing module and control unit are added for precise motion control, then tactile feedback accuracy improves, but the device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes control signals from the processor, receives feedback data from the sensing module, calculates required adjustments, and generates control signals for the driving assembly. This multi-functionality reduces the need for separate dedicated components for each function, mitigating the increase in overall system complexity.
Solution Approach 2:
The patent integrates the sensing module, control unit, and driving assembly into a cohesive tactile feedback system where components work together synergistically. The sensing module is integrated with the movable part structure, and the control unit consolidates multiple control functions, reducing the overall system complexity despite adding precision measurement capabilities.
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 system provides precise and comfortable tactile feedback by accurately controlling the motion and amplitude of the movable part, enhancing user interaction with electronic devices.
Implementation Method 1
a driving assembly configured to drive the movable part to move relative to the fixed part, thereby generating a tactile feedback force to a user
Data Source
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AI summary
A tactile feedback system (1-1) is provided, including a fixed part (1-11), a movable part (1-12), and a driving assembly. The fixed part (1-11) is affixed to an electronic device. The movable part (1-12) can move relative to the fixed part (1-11). The driving assembly is configured to drive the movable part (1-12) to move relative to the fixed part (1-11), thereby generating a tactile feedback force to a user.