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References in periodicals archive ?
The transmitting coil excitation frequency is 2 MHz, equivalent to an angular frequency, [omega] = 2[pi] * 2 * [10.sup.6], which is the Duffing oscillator circuit frequency designed.
A theoretical interpretation of this aspect comes from several works in which it is stated that, in the case of crack breathing into beam structures, the higher first superharmonic behavior is excited when the excitation frequency matches one-half of the eigenfrequency [17, 25].
To solve this problem, we can closely sample the external excitation frequency so as to bind the bandgap cutoff frequency of the nonlinear system, i.e., the point of zero-mass frequency.
13, the amplitude of RR is the highest for the lowest chosen excitation frequency and the lowest for the highest chosen excitation frequency.
As observed, the steel wire rope with a diameter of 4 mm was placed in four stated locations and tracked and imaged using 400 kHz as the excitation frequency. However, when the object was positioned in the central location, the reconstructed image of the object shifted.
In the meanwhile, only the predominant excitation frequency is considered, ignoring higher harmonic terms [16,17].
Before the parametric vibration test of the cable is carried out, dynamic characteristics analysis of the test model cable is needed to accurately determine the first-order natural frequency, which can be used as the effective basis for the excitation frequency of the end support in the process of cable parameters test.
* Programmable Excitation Voltage, Excitation Frequency, Sensor Displacement, and Sensor Sensitivity maximizes sensor resolution, accuracy, and linearity
The average ICP and MIPS values obtained from 6 ACH rabbits at an excitation frequency of 10.7 MHz are reported in Figure 6.
The deexcitation 2 [right arrow] 1 is expected to be induced by an excitation frequency [f.sub.21] = 254 Hz, corresponding to the resonant horizontal velocity of [v.sub.21] = [df.sub.21] = 2.54 m/s; for the 3 [right arrow] 1 case, we expect [f.sub.31] = 462 Hz and [v.sub.31] = 4.62 m/s.
With FDFD, a tradeoff between computational accuracy and time is used to determine the grid size for a given excitation frequency [f.sub.s], with good accuracy ([approximately equal to] [[DELTA].sup.2]) maintained for grid spacing [DELTA] < [lambda]/20.
When the natural frequency of the system has a multiple relationship with the excitation frequency, even a small excitation can cause complex responses [13, 14] of the system which is different from the external excitation.