Fourthly, to improve the amplitude frequency response characteristics of APDF based on IDCT/DCT, the design formula of windowed APDF based on IDCT/DCT is derived.

The results show that calculation methods put forward by authors can exactly calculate amplitude frequency response characteristics of the present bearing from 22 Hz to 400 Hz at film gap smaller than 70 μm.

On the condition of using the same number of frequency samples, the amplitude frequency response characteristics of Kaiser windowed APDF based on IDCT/DCT is better than of FIR digital filter designed by frequency sampling method.

Structural feature of the apparatus for testing amplitude frequency response characteristics, software and hardware, operating principles and influence of apparatus’ mechanical modal on test results were introduced.

Five kinds of filters (from a to e) are designed, with rectangle-like amplitude frequency response characteristic curve, flat top pass band, nearly 0 dB ripples, and isolation up to 50 dB.

the measuring system is built to test its dynamic characteristics, and experiments are carried out on the step response and amplitude frequency response of theflapper-nozzle servo valve based on GMA. It is shown that its rising time is about 1 ms, and its frequency response can reach 680 Hz (-3 dB).

The curves of its amplitude frequency response have some nonlinear features, such as inclination and jump phenomena of the curves , which coincide with the theoretic analysis.

In this paper, a method of numerical integration is presented for data processing of strong motion accelerograms in the correction of distorted amplitude frequency response obtained by the type RDZI-12-66 automatic triggering accelerograph, galvanometrically recorded.

After the piezoelectric torsional actuator was bonded onto the optimal position and closed-loop control was achieved,the first three order closed-loop amplitude frequency response of the angular displacement at the free end was obtained.

Thirdly, to put the APDF based on IDCT/DCT into practice, three fast realizations are put forward. The amplitude frequency response characteristics of the filter all can be tuned in real time, and are especially suited in adaptive filtering where the response of filter is changing in real time.

Combing sweep-frequency technique amplitudes of MEMS resonator at a series of frequencies are acquired. So amplitude frequency response characteristics curve of MEMS resonator is obtained.

The algorithm uses a curve-fitting method to identify the modal of amplitude frequency response functions, and then transforms its 'poles' and 'zeros' to those of transfer function's.

The amplitude frequency response curves and their frequency properties of the parametric resonances are investigated by using the method of numerical analysis.

The Bogolyubov'Mitropolsky averaging method is used to plot amplitude'frequency response curves for steady-state vibrations.

The results show that the amplitude frequency response of the stage is largely affected by the nonlinear air bearings, and the positioning accuracy is affected by the gap of the air bearings, as well as the control method.

The amplitude frequency response is also significantly smaller for group A in relation to group B for the frequency range 0.25-0.43 Hz.

The amplitude frequency response of the inhibitory system is constant for high spatial frequencies down to 1/λ=0,1 while amplitudes of lower frequency sinusoids are reduced down to nearly half of the maximum value at frequency zero.

The result indicates that variation of amplitude frequency response characteristics of the system with Bond, jump, lag and other nonlinear phenomena of liquid sloshing are investigated.

In this paper, a method of numerical integration is presented for data processing of strong motion accelerograms in the correction of distorted amplitude frequency response obtained by the type RDZI-12-66 automatic triggering accelerograph, galvanometrically recorded. The zero base-line correction of an accelerogram is done by means of a high pass digital filter and a computer program is compiled for this purpose. The duration traces of the corrected acceleration, velocity and displacement are respectively...

In this paper, a method of numerical integration is presented for data processing of strong motion accelerograms in the correction of distorted amplitude frequency response obtained by the type RDZI-12-66 automatic triggering accelerograph, galvanometrically recorded. The zero base-line correction of an accelerogram is done by means of a high pass digital filter and a computer program is compiled for this purpose. The duration traces of the corrected acceleration, velocity and displacement are respectively plotted. The Fourier spectra of the accelerograms before and after correction are calculated and discussed.The corrected accelerograms can accurately represent the absolute ground acceleration within the frequency band of 0.09 cps and 25 cps of the instrument.

The design considerations of the SAW filter operating at 140 MHz with 3dB-bandwidth of 27 MHz are described.By using a multistrip coupler and tilted transducers in association with split fingers and spurious electrodes the second order effects were suppressed effectively. Thereby a device with a better shape factor, smaller ripples in both the amplitude-frequency responses and group delay as well as heigher out-of-band rejection has been achieved.

A new injection-locking oscillator using differential amplifier is described. Utilized as an amplifier or divider, it has good stability, wide synchronous range and high translation gain. In this paper, a mathematical model is developed for it, and the principles and amplitude-frequency responses of various modes are analyzed by averaging method. The calculation equations of synchronous range and the general expression of phase equations are also given. Finally, the experimental results are...

A new injection-locking oscillator using differential amplifier is described. Utilized as an amplifier or divider, it has good stability, wide synchronous range and high translation gain. In this paper, a mathematical model is developed for it, and the principles and amplitude-frequency responses of various modes are analyzed by averaging method. The calculation equations of synchronous range and the general expression of phase equations are also given. Finally, the experimental results are presented.