The inverter controller is adopted PIC single-chip-computer and PWM chip SA4828, and IPM as inverter, LC wave filter. The voltage feedback is got through the chip AD736 which accomplishes the task of sampling the voltage.

The harmonic wave filter is added to the frequency converter to reduce the distortion ratio of harmonic wave of station service power from 26.9% to about 4.4% .

The filter, three-terminal chip capacitor and the capacitor can be used in the lowvoItage power suppIy circuit(5V. +l-15V and 24V) to restrain the EFTs affecting thedigital system.

For example, to the frequency splitting between fundamental wave and second harmonics, the filter Daub6 and CQF12 do well in extract the fundamental wave, whereas the filter Daub5 and Daub6 do well in extract the second harmonics.

We characterize the wavelet multipliers, as well as the scaling function multipliers and low pass filter multipliers.

For compactly supported gm, n (FIR filter banks) we prove an exponential rate of convergence and derive explicit expressions for the involved constants.

This, in turn, is used for designing local orthogonal bases obtained by unitary transformations of a single prototype filter.

This in turn, is used for designing local orthogonal bases obtained by unitary transformations of a single prototype filter.

The measure for uncertainty is a product of two factors evaluating the frequency selectivity in comparison with the ideal filter and the effective length of the filter in the digital domain, respectively.

The main purpose of this paper is to give a procedure to "mollify" the low-pass filters of a large number of Minimally Supported Frequency (MSF) wavelets so that the smoother functions obtained in this way are also low-pass filters for an MRA.

This phenomena is related to the invariant cycles under the transformation We also give a characterization of all low-pass filters for MSF wavelets.

The main purpose of this paper is to give a procedure to "mollify" the low-pass filters of a large number ofMinimally Supported Frequency (MSF) wavelets so that the smoother functions obtained in this way are also low-pass filters for an MRA.

We also give a characterization of all low-pass filters for MSF wavelets.

Unitary mappings between multiresolution analyses of L2 (R) and a parametrization of low-pass filters

Robust autopilot with wave filter for ship steering

A ship's dynamic model with wave disturbances was built and a wave filter was designed by means of an extended states observer (ESO).

According to ZBJ65015-89 standard about noise level testing method of woodworking tool, the noise testing for MJ90# and MJC1125 precision panel saws was conducted by using model ND2 precision sound-level apparatus and double frequency wave filter.

Our data on the spectral absorbance of the lens and visual pigment of these fishes suggest that the lens pigmentation acts as a short-wave filter to improve acuity of the visual system.

Pipelining the unconstrained three-port wave filter adaptor at the bit level

The measure for uncertainty is a product of two factors evaluating the frequency selectivity in comparison with the ideal filter and the effective length of the filter in the digital domain, respectively.

The uncertainty product of such minimizing filters approaches the unrestricted infimum as the filter length increases.

We conclude that the filter-capacitance of the rectifier can be designed.

Furthermore, the filter design problem is converted into a convex optimization problem with linear matrix inequality (LMI) constraints.

The filter was operated in the downflow manner and the results showed that the removing rate of NH4+-N was related to the influent concentration of NH4+-N.

When the converter, used for HVDC transmission, is connected to a weak a.c. power system, the filters and static condensers on its a.c. side also supply a considerable amount of additional commutating current, which is usually neglected in the case of converter connecting to strong power system. Taking into account the effect of this additional commutating current, the commutation process is accelerated, so that in the performance analysis of converters connected to weak system this effect must be considered....

When the converter, used for HVDC transmission, is connected to a weak a.c. power system, the filters and static condensers on its a.c. side also supply a considerable amount of additional commutating current, which is usually neglected in the case of converter connecting to strong power system. Taking into account the effect of this additional commutating current, the commutation process is accelerated, so that in the performance analysis of converters connected to weak system this effect must be considered. In this paper the experimental results obtained on a physical model are presented. The results are analysed in detail. By comparison of the analytical and experimental results, it is revealed that the method here proposed for calculating the performance of the conveterts connected to a weak power system is satisfactory for general design work.

This paper describes the input circuit and anti-interference measures of A-D-A type digital frequency discriminator used in the speed governing system of hydraulic turbines.In the first part of the paper, a current composite connection for simplifying the main equipment circuitry and the design of an input filter are introduced. In the second part, after a brief analysis of the interference characteristic in the speed governing system of hydraulic turbines, effective measures for resisting interference are proposed....

This paper describes the input circuit and anti-interference measures of A-D-A type digital frequency discriminator used in the speed governing system of hydraulic turbines.In the first part of the paper, a current composite connection for simplifying the main equipment circuitry and the design of an input filter are introduced. In the second part, after a brief analysis of the interference characteristic in the speed governing system of hydraulic turbines, effective measures for resisting interference are proposed.

In this paper, a dynamic measuring system for vibration parameters is discussed, which can be used to analyse the performance of a rotating machine during its speed-up. The system includes digitally-controlled-conductance tunable active filters, digitally-controlled sine and cosine components converter, low-frequency wide-band phase-locking frequency-doubling circuits, e. t. c. It can be used to plot curves directly, with the help of a x—y recorder, such as the amplitude-frequency and phase-frequency characteristics...

In this paper, a dynamic measuring system for vibration parameters is discussed, which can be used to analyse the performance of a rotating machine during its speed-up. The system includes digitally-controlled-conductance tunable active filters, digitally-controlled sine and cosine components converter, low-frequency wide-band phase-locking frequency-doubling circuits, e. t. c. It can be used to plot curves directly, with the help of a x—y recorder, such as the amplitude-frequency and phase-frequency characteristics and the polar diagram of vibration parameters. The auto-tracking frequency filter of the system can be used as a synchro-filter and for automatic analysis of frequency spectrum. Direct plotting of polar diagram is a new function for which no commercial instrument is available as yet.