Unlock instant, AI-driven research and patent intelligence for your innovation.

Actuator control device and method

A control method and a technology of a control device, which are applied in the field of actuator devices, can solve problems such as difficulty in generating actuator braking signals, and achieve the effect of removing residual vibration

Pending Publication Date: 2021-02-19
DONG WOON ANATECH CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Generally, in order to reduce the residual vibration of the actuator, it detects the zero-crossing point of the back electromotive force (BEMF) signal and the amplitude of the BEMF signal, and automatically generates and controls the braking signal, but when the driving time is short or the amplitude of the BEMF signal small, it is difficult to generate an effective waveform of the braking signal capable of reducing the residual vibration of the actuator

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Actuator control device and method
  • Actuator control device and method
  • Actuator control device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040]Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that detailed descriptions such as related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed descriptions thereof will be omitted. For example, the actuator control device according to the embodiment of the present invention can be applied to a tactile feedback system, and it is assumed that the device to which the present invention can be applied includes a touch-sensitive surface or other types of interfaces and actuators, and it is assumed that Vibration of the actuator.

[0041]Meanwhile, in the terms used below, the term "drive waveform" refers to the waveform applied to the actuator during the drive time interval constituting the drive signal, and can be adjusted in such a way that the length of the drive time interval means a c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a haptic feedback system and, specifically, to a device and method for controlling an actuator for haptic feedback, the method comprising: an actuator resonance frequency correction operation step of operating an actuator by repeatedly generating and outputting an operating signal including an operating time interval in which operating voltage is applied to the actuator and a guard time interval in which a back electromotive force (BEMF) signal of the actuator is detected, while correcting the length of the operating time interval according to detection time ofa zero cross point of the BEMF signal detected within the guard time interval; and an actuator braking step of outputting at least one brake signal in synchronization with a zero cross point of the BEMF signal detected within the guard time interval, in order to remove residual vibration of the actuator.

Description

Technical field[0001]The present invention relates to a haptic feedback system, and more particularly to a device and method for controlling an actuator for haptic feedback.Background technique[0002]Haptic feedback systems are installed and used in various devices for user interfaces. For example, the user is provided with tactile feedback through vibration from the touch screen, softkey, home button, and fingerprint recognition sensor of the portable device. Recently, vibration feedback systems have also been installed in many devices including touch screens such as automobiles and home appliances.[0003]A linear resonance actuator (Linear Resonance Actuator: LRA) is used as a device that generates vibration in a tactile feedback system. Linear resonant actuators have such a characteristic that only when the resonance frequency (f0) When the linear resonance actuator is driven, the maximum vibration with the best power efficiency can be obtained.[0004]The resonance frequency of line...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01B06B1/02
CPCG08B6/00B06B1/0253B06B1/023B06B1/04B06B2201/30G06F3/016B06B1/0215B06B1/0276H02P3/00
Inventor 李秀烈陈泰刘泰炅
Owner DONG WOON ANATECH CO LTD