Vibration reducing device
US7715949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Jun 18, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/302
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vibration reducing device that reduces the vibration of a control object includes a digital controller. A vibration state detection device detects the vibration of the control object and generates an analog signal of the vibration of the control object. An input-side bandpass filter has a passband that is narrower than a frequency range from a Nyquist frequency to a sampling frequency of the digital controller, and that contains no frequencies that are an integer multiple of the Nyquist frequency of the digital controller. The input-side bandpass filter allows a part of the analog signal that falls within the passband from the analog signal generated by the vibration state detection device to pass. An A/D conversion device converts the analog signal that has passed through the input-side bandpass filter into a digital signal. A D/A conversion device converts a digital feedback control signal, determined by the digital controller on the basis of the digital signal converted by the A/D conversion device, into an analog feedback control signal. An actuator applies vibration to the control object on the basis of the analog feedback control signal converted by the D/A conversion devic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.