Adaptive Haptic Waveform Generation With Resonance Feedback
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Solution Overview
Problem
Conventional haptic waveform generation systems fail to provide consistent haptic vibrations across different haptic actuators and user devices due to variations in actuator parts and environmental conditions, leading to inconsistent user experiences.
Innovation Solution
A closed-loop feedback system that dynamically generates haptic waveforms by composing an envelope of an acceleration profile based on real-time feedback measurements of the haptic actuator's resonant frequency and electromechanical parameters, allowing for continuous adaptation and tuning of the driving signal to maintain consistent vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same electrical waveform is applied to different haptic actuators, then the waveform generation process is simple and consistent, but the haptic vibration output varies due to actuator variations
Solution Approach 1:
The system measures the actual haptic vibration output and uses this feedback to adjust the electrical waveform in real-time, compensating for actuator variations and maintaining consistent haptic performance across different devices
Solution Approach 2:
The system dynamically adjusts waveform parameters such as frequency, amplitude, and duration based on measured actuator characteristics and environmental conditions, transforming a static waveform approach into an adaptive one that maintains consistency
2Reliability
If feedback measurements and real-time adjustments are implemented, then haptic vibration consistency is improved, but the system complexity increases
Solution Approach 1:
The waveform generation system is designed to perform multiple functions: generating base waveforms, measuring actuator response, analyzing feedback data, and adjusting parameters in real-time, all within a single integrated system that manages complexity through functional consolidation
3Ease of manufacture
If pre-determined waveforms are used for different haptic effects, then the system is simple to implement, but it cannot adapt to actuator aging and environmental changes
Solution Approach 1:
The system transitions from static pre-determined waveforms to dynamic adaptive waveforms that continuously adjust their characteristics based on real-time measurements of actuator performance and environmental conditions, enabling the system to adapt to aging and changes while maintaining reasonable implementation complexity
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
This approach ensures consistent haptic experiences across various haptic actuators and user devices, reduces the need for pre-determined waveforms, and enhances user experience by adapting to changes in actuator conditions, such as aging and environmental factors.
Implementation Method 1
electrical waveforms are applied to the haptic actuator
Implementation Method 2
determine one or more parameters of the haptic actuator based on the one or more feedback measurements. The one or more parameters may include the resonant frequency of the haptic actuator
Data Source
AI summary
Innovative techniques to design and generate haptics waveforms are proposed. The proposed techniques enable consistent haptics user-experience to be enable despite variations among different haptic actuators. Arbitrary waveforms may be generated without selecting from a list of pre-determined waveforms.