| Presentation | 2014-06-20 An Evaluating Method for Fundamental Dynamical Parameters of Objects on a Printed Circuit Board (5) : Natural Frequency and Damping Ratio(2) Keiji KOSHIDA, Shin-ichi WADA, Hiroaki KUBOTA, Koichiro SAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Authors have obtained the steady-state responses using theoretical inputs developed by Fourier series and the analytical outputs when input waveforms are sinusoidal and rectangular. Following the characteristics of input waveform, the kinetic nature of the system has the effects on the output waveform, which are remarkable in case of rectangular input. And they estimated natural frequency and damping ratio as fundamental dynamical parameters using transient and steady-state response waveforms by the external force. It is shown that the parameters depend upon the existence of connectors on the PCB, external force, and additional masses. It is also illustrated that time-sequential acceleration variations calculated by the estimated parameters have a lot of parallels with experimental waveform. In this paper, they introduce the numerical analysing method which is used when evaluating the natural frequencies and the damping ratios. By applying the parameter fitting method to the time-sequential acceleration waveforms in experimental data, they estimate the above dynamical parameters, compare the waveforms re-constructed from the parameters with the experimental results, and discuss the validation of the evaluating method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | natural frequency / damping ratio / micro-oscillation / falling weight / PCB (printed circuit board) / hammering oscillation mechanism |
| Paper # | EMD2014-14,CPM2014-34,OME2014-22 |
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| Committee | EMD |
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| Conference Date | 2014/6/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromechanical Devices (EMD) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Evaluating Method for Fundamental Dynamical Parameters of Objects on a Printed Circuit Board (5) : Natural Frequency and Damping Ratio(2) |
| Sub Title (in English) | |
| Keyword(1) | natural frequency |
| Keyword(2) | damping ratio |
| Keyword(3) | micro-oscillation |
| Keyword(4) | falling weight |
| Keyword(5) | PCB (printed circuit board) |
| Keyword(6) | hammering oscillation mechanism |
| 1st Author's Name | Keiji KOSHIDA |
| 1st Author's Affiliation | TMC System Co. Ltd.() |
| 2nd Author's Name | Shin-ichi WADA |
| 2nd Author's Affiliation | TMC System Co. Ltd. |
| 3rd Author's Name | Hiroaki KUBOTA |
| 3rd Author's Affiliation | TMC System Co. Ltd. |
| 4th Author's Name | Koichiro SAWA |
| 4th Author's Affiliation | Nippon Institute of Thechnology |
| Date | 2014-06-20 |
| Paper # | EMD2014-14,CPM2014-34,OME2014-22 |
| Volume (vol) | vol.114 |
| Number (no) | 94 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |