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In this paper, the pitch angle control design problem of wind turbine generator is considered. Dynamic characteristics of wind turbine system vary according to the wind speed and also the generator speed. But it is required to maintain the generator speed at the optimal one in spite of such variations. For this purpose, the pitch angle control of wind(More)
Frequency calibration of a 1.3-microm diode laser spectrometer was carried out with a simultaneously recording spectrum of the iodine molecule in the visible region using internal second harmonics from the diode laser itself. An absolute accuracy of 0.002 cm(-1) was achieved with the frequency standard spectrum of the iodine molecule in the visible region(More)
Two methods for recording a hologram plate suitable for information search are discussed: consecutive recording of individual items on the same area of a hologram plate and parallel recording of individual identifiers on individual areas of a hologram plate. To increase the number of items to process, the use of a rotating drum is proposed, and experimental(More)
We have developed a new technique for shifting the frequency of a TEA CO(2) laser that utilizes a Pockels cell in the main cavity and an acousto-optic frequency shifter in the subcavity. The amount of frequency shift was controllable by the gate pulse width of the Pockels cell. The maximum shift from the line center achieved was 1.4 GHz at the 10P(20) line,(More)
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