Frequency-domain analysis method using eigenvalues and eigenvectors for switched circuits

1990 ◽  
Vol 73 (9) ◽  
pp. 54-62
Author(s):  
Ichirou Oota ◽  
Fumio Ueno ◽  
Takahiro Inoue ◽  
Tan Sin Eam
Keyword(s):  
Frequency Domain ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Analysis Method ◽  
Eigenvalues And Eigenvectors ◽  
Switched Circuits

Frequency-domain analysis method for analyzing and improving the steady-state characteristics of microcantilever in tapping-mode atomic force microscopy

2018 ◽  
Vol 82 (1) ◽  
pp. 10701
Author(s):  
Xiaohui Gu ◽  
Lining Sun ◽  
Changhai Ru
Keyword(s):  
Steady State ◽  
Frequency Domain ◽  
Stability Margin ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
System Stability ◽  
Analysis Method ◽  
External Interference ◽  
Tapping Mode ◽  
The Stability

In tapping-mode AFM, the steady-state characteristics of microcantilever are extremely important to determine the AFM performance. Due to the external excitation signal and the tip-sample interactions, the solving process of microcantilever motion equation will become very complicated with the traditional time-domain analysis method. In this paper, we propose the novel frequency-domain analysis method to analyze and improve the steady-state characteristics of microcantilever. Compared with the previous methods, this new method has three prominent advantages. Firstly, the analytical expressions of amplitude and phase of cantilever system can be derived conveniently. Secondly, the stability of the cantilever system can be accurately determined and the stability margin can be obtained quantitatively in terms of the phase margin and the magnitude margin. Thirdly, on this basis, external control mechanism can be devised quickly and easily to guarantee the high stability of the cantilever system. With this novel method, we derive the frequency response curves and discuss the great influence of the intrinsic parameters on the system stability, which provides theoretical guidance for selecting samples to achieve better AFM images in the experiments. Moreover, we introduce a new external series correction method to significantly increase the stability margin. The results indicate that the cantilever system is no longer easily disturbed by external interference signals.

Measurement of temperature and strain using Brillouin optical frequency-domain analysis method

2002 ◽  
Author(s):  
Vladimir A. Saetchnikov ◽  
Ellyn A. Chernyavskaya ◽  
Tatjana P. Yanukovich
Keyword(s):  
Frequency Domain ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Optical Frequency ◽  
Analysis Method

The Test and Time-Frequency Domain Analysis on Plant Electrical Signal Based on Virtual Instrument

2015 ◽  
Vol 738-739 ◽  
pp. 686-689
Author(s):  
Ling Ling Wang ◽  
Hong Xia Luo ◽  
Jian Hua Cao ◽  
Kun Lu ◽  
Ji Hua Fang ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Virtual Instrument ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Electrical Signal ◽  
Future Research ◽  
Comprehensive Treatment ◽  
Analysis Method ◽  
Time Frequency

We tried to obtain numbers of the plant electrical signal with the help of experiments. We made comprehensive treatment and analysis by using the time domain analysis method and frequency domain analysis method to the large numbers of data of the plant electrical signal. The experiment finds that that the plant electrical signal is a kind of low frequency,tiny and fairly stable signal. The features of plant electrical signals remarkably responsive to external stimuli. The measuring precision is limited in the test, so the conclusion only can be mined and used for for future research.

Time‐domain and frequency‐domain analysis of acoustic scattering by spheres

1994 ◽  
Vol 95 (5) ◽  
pp. 2478-2487 ◽  
Author(s):  
Peter D. Thorne ◽  
Terry J. Brudner ◽  
Kendall R. Waters
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Acoustic Scattering ◽  
Domain Analysis ◽  
Frequency Domain Analysis
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