Linear Motor Waveform Mapping for Stronger Haptic Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Linear motors in electronic devices often fail to provide the expected vibration effect due to mismatched frequency and amplitude characteristics between the vibration description file and the motor attributes, leading to inadequate vibration sensing, especially in smaller volume Z-axis motors.
Innovation Solution
A method and apparatus that adjust the vibration waveform by mapping the frequency and amplitude of the steady-state and transient waveforms from the vibration description file to target values tailored to the specific linear motor, using exponential and sin-like function rules to ensure the vibration effect is enhanced and safe, while expanding transient waveforms into sequences to improve vibration intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the vibration description file is used directly without adjustment, then the control parameters are simple and universal, but the vibration effect does not meet user expectations due to mismatch with linear motor attributes
Solution Approach 1:
The patent transforms the original control parameters from the vibration description file into adjusted control parameters by applying mapping rules that consider the linear motor's frequency response characteristics. This involves changing the frequency parameters according to the motor's resonant frequency range and amplitude characteristics, thereby achieving precise vibration effects that match user expectations while maintaining automated parameter transformation
Solution Approach 2:
The patent introduces an intermediate processing layer between the vibration description file and the linear motor control. This layer includes a parameter adjustment module that acts as a mediator, automatically transforming the universal control parameters into motor-specific parameters based on the motor's frequency response curve, thus resolving the mismatch without requiring manual reconfiguration
2Reliability
If the frequency is mapped to target frequency using mapping rules, then the vibration effect is enhanced, but the processing complexity increases
Solution Approach 1:
The patent pre-establishes mapping rules based on the linear motor's frequency response characteristics before actual vibration control. The frequency mapping relationship is determined in advance by analyzing the motor's resonant frequency range and amplitude characteristics, so that during operation, only simple parameter substitution is needed rather than complex real-time calculations
Solution Approach 2:
The system automatically performs frequency mapping and parameter adjustment without requiring manual intervention. The parameter adjustment module self-adapts to the linear motor's characteristics by reading the frequency response data and automatically generating the appropriate control parameters, thereby reducing operational complexity while ensuring reliable vibration sensing
Data Source
AI summary
A method and an apparatus for adjusting a vibration waveform of a linear motor. At least one of the following steps is performed: obtaining a frequency of a steady-state waveform of a vibration description file, and mapping the frequency to a target frequency according to a preset first mapping rule and a frequency of the linear motor; or obtaining a transient waveform of the vibration description file and expanding the transient waveform into a waveform sequence formed by a plurality of target transient waveforms, where the frequency of the waveform sequence is the same as a frequency of the transient waveform of the vibration description file, and a frequency of a target transient waveform is adapted to the linear motor. Therefore, both the steady-state waveform and the transient waveform can be adapted to the characteristics of the linear motor, thereby improving the vibration effect of the linear motor.