Haptic Output Device Resonance Correction Controller
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Solution Overview
Problem
Conventional haptic-enabled devices face challenges in providing effective haptic feedback due to resonance frequencies in vibration systems, as they do not adequately account for these frequencies in their control mechanisms.
Innovation Solution
A haptic output device and method that utilize a controller to correct drive signals using a pseudo inverse filter model, which is generated based on the resonance frequencies of the vibration system, to stabilize and improve haptic feedback by reducing resonance effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional haptic control is used without considering resonance frequencies, then the control mechanism is simple, but haptic feedback quality deteriorates due to resonance vibrations
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for resonance frequencies in a lookup table before actual haptic operation. The controller retrieves and applies these pre-computed corrections during haptic feedback generation, avoiding real-time complex calculations while effectively compensating for resonance effects. This resolves the contradiction by preparing corrective measures in advance, improving haptic quality without adding real-time computational complexity.
Solution Approach 2:
The patent introduces an intermediary correction mechanism that acts between the drive signal generation and the haptic actuator. A correction value derived from resonance frequency characteristics is applied as an intermediate adjustment to the drive signal, mediating the interaction between the control system and the vibration system. This intermediary correction improves haptic feedback quality by counteracting resonance effects without requiring complete redesign of the control mechanism.
2Stability of the object's composition
If resonance frequencies are not compensated, then device complexity remains low, but haptic output stability deteriorates due to oscillations at resonance frequencies
Solution Approach 1:
The patent replaces complex real-time mechanical vibration analysis with a simplified signal processing approach. Instead of continuously analyzing vibration characteristics and dynamically adjusting control parameters, the system uses pre-determined resonance frequency data to generate correction signals. This substitution of mechanical analysis with signal processing maintains haptic output stability while keeping the device complexity low.
Solution Approach 2:
The patent applies parameter changes by modifying the drive signal parameters based on resonance frequency characteristics. A correction value that accounts for resonance frequencies is applied to adjust the amplitude and phase parameters of the drive signal. This parameter adjustment stabilizes haptic output by counteracting resonant oscillations without requiring complex structural modifications or additional hardware.
3Reliability
If correction models for resonance frequencies are implemented, then haptic feedback quality improves, but computational processing requirements increase
Solution Approach 1:
The patent significantly reduces computational energy consumption by performing resonance correction calculations in advance and storing the results in a lookup table. During actual haptic operation, the controller simply retrieves pre-computed correction values based on the current operating conditions, avoiding energy-intensive real-time calculations. This preliminary action approach maintains high haptic feedback quality while minimizing computational energy requirements during operation.
Solution Approach 2:
The patent uses copying by creating a simplified mathematical model or lookup table that represents the complex resonance characteristics of the haptic system. Instead of performing full dynamic simulations during operation, the system copies the essential resonance behavior into a compact data structure that can be quickly queried and applied. This copying approach preserves haptic feedback quality while drastically reducing computational energy consumption during real-time operation.
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 solution enables the provision of a stable and effective haptic feedback by suppressing oscillations and maintaining a consistent gain across frequencies, thereby enhancing the responsiveness and quality of haptic output.
Implementation Method 1
an actuator configured to vibrate in accordance with an input signal
Implementation Method 2
a vibration system having one or more resonance frequencies
Implementation Method 3
correcting a drive signal using a correction model preliminarily generated based on the resonance frequencies... suppressing oscillations
Data Source
AI summary
A haptic output apparatus includes a vibration system having one or more resonance frequencies, the vibration system including an actuator configured to vibrate in accordance with an input signal, and including an object coupled to the actuator and configured to be excited in response to the vibration of the actuator. The haptic output apparatus includes a controller configured to control driving of the actuator. The controller corrects a drive signal using at least one correction model to output the corrected drive signal to the actuator as the input signal, the correction model being preliminarily generated based on the resonance frequencies. Alternatively, the controller outputs a control signal to the actuator as the input signal, the control signal being preliminarily generated using the correction model.