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    • 3. 发明专利
    • Servo controller
    • 伺服控制器
    • JPS6198416A
    • 1986-05-16
    • JP21844684
    • 1984-10-19
    • Hitachi Keiyo Eng Co LtdHitachi Ltd
    • SAITO HITOSHIHANADA TAKESHIUCHIDA AKIRAOSHIRO MASAYUKI
    • G05D3/12B25J9/16B25J13/00H02P23/00
    • H02P23/16
    • PURPOSE:To improve the attenuation of the natural oscillation of a mechanism part by extracting a speed signal out of the mechanism part in addition to a normal feedback system and feeding the signal back. CONSTITUTION:A speed command 20 is transmitted to a servo motor 12 via amplifiers 21 and 22 and a current amplifier 23. Meanwhile the speed signal given from a tachogenerator 11 attached to a servo motor 12 is fed back. Thus a normal servo system is attained. The revolutions of the motor 12 drive a load 16 via a harmonic attenuator 13 and an output shaft 18. The load 16 has the natural oscillation and therefore has vibrations. These vibrations are accelerated by a gear 15 and extracted by a tachogenerator 14 as the speed signals. These speed signals are fed back to undergo addition/subtraction with the command 20. Then the natural oscillation of a mechanism part is attenuated.
    • 目的:通过从正常的反馈系统以及反馈信号中提取机构部分的速度信号,来改善机构部件的自然振荡的衰减。 构成:速度指令20通过放大器21和22以及电流放大器23发送到伺服电动机12.同时,从安装在伺服电动机12上的转速发电机11给出的速度信号被反馈。 因此,获得正常的伺服系统。 电动机12的转数通过谐波衰减器13和输出轴18驱动负载16.负载16具有自然振荡并因此具有振动。 这些振动由齿轮15加速并且由转速发生器14作为速度信号提取。 这些速度信号被反馈以通过命令20进行加法/减法。然后机构部件的自然振荡被衰减。
    • 5. 发明专利
    • PHOTOVOLTAIC SENSOR
    • JP2000111584A
    • 2000-04-21
    • JP28378998
    • 1998-10-06
    • HITACHI LTD
    • SONE ISAMUSHIROKURA TOSHIJIKUBOTA YOSHIMASAYAMAGIWA TOKIOUCHIDA AKIRA
    • G01R15/24
    • PROBLEM TO BE SOLVED: To prevent photoelastic effect from being generated in a Pockels element, and to stabilize measurement accuracy even receiving a stress due to the vibration and temperature change of installation environment by supporting the Pockels element by a buffer material for fixing, and by bonding other optical parts to a substrate. SOLUTION: A photovoltaic sensor is composed of a polarizer module 5 consisting of a Pockels element 1, a 1/4 wavelength plate 2, a polarizer 3, and a prism 4, and/or an analyzer module 8 consisting of an analyzer 6 and a prism 7. Optical parts other then the Pockels element 1 are bonded to a substrate 9a. Each light I/O terminal comprising collimators 13a, 13b, and 13c and light connection terminals 12a, 12b, and 12c are also bonded to the substrate after an optical axis is adjusted. The Pockels element 1 where an electrode sheet 11 is provided at upper and lower parts is pressed from four directions being vertical to the optical axis by a buffer material 10 for fixing, and also is not brought into contact with other optical parts, thus suppressing stress being applied to the Pockels element 1 by vibration and temperature change.