Control apparatus for construction machine
    1.
    发明授权
    Control apparatus for construction machine 失效
    施工机械控制装置

    公开(公告)号:US6009708A

    公开(公告)日:2000-01-04

    申请号:US77833

    申请日:1998-06-04

    摘要: The present invention relates to a control apparatus for a construction machine such as a hydraulic shovel, and the control apparatus for a construction machine includes a revolving operation member for operating a construction machine revolving unit (14), a fluid pressure pump (2) and an accumulator (5) for accumulating working oil from the fluid pressure pump (2), a fluid pressure actuator (7) for driving the construction machine revolving unit (14) to revolve with the working oil from the fluid pressure pump (2) and the accumulator (5), a first control valve (8) interposed between the fluid pressure actuator (7) and the fluid pressure pump (2), a second control valve (11) for controlling an inflow condition of the fluid from the fluid pressure actuator (7) into the accumulator (5), and control means (9) including first valve control means (9a) for controlling the first control valve (8) and second valve control means (9b) for controlling the second control valve (11).

    摘要翻译: PCT No.PCT / JP97 / 00820 Sec。 371日期:1998年6月4日 102(e)日期1998年6月4日PCT 1997年3月14日PCT公布。 公开号WO98 / 24987 日期:1998年11月6日本发明涉及一种用于诸如液压挖掘机的施工机械的控制装置,并且施工机械的控制装置包括用于操作施工机械旋转单元(14)的旋转操作构件,流体压力 泵(2)和用于从流体压力泵(2)累积工作油的蓄能器(5),用于驱动施工机械旋转单元(14)与来自流体压力的工作油一起旋转的流体压力致动器(7) 泵(2)和蓄能器(5),置于流体压力致动器(7)和流体压力泵(2)之间的第一控制阀(8),用于控制流体压力 从流体压力致动器(7)流入蓄能器(5)的流体,和包括用于控制第一控制阀(8)的第一阀控制装置(9a)和用于控制第一阀控制装置 第二控制阀(11 )。

    Optical disc tracking servo circuit having compensation for disc defects
and external disturbances
    2.
    发明授权
    Optical disc tracking servo circuit having compensation for disc defects and external disturbances 失效
    具有光盘缺陷和外部干扰补偿的光盘跟踪伺服电路

    公开(公告)号:US4703468A

    公开(公告)日:1987-10-27

    申请号:US740841

    申请日:1985-05-21

    摘要: The present invention pertains to an improvement for a tracking servo circuit which controls the tracking of an optical pickup on an optical disc in an apparatus for reproducing a sound or image recorded on the optical disc. The present invention is characterized by the provision of a circuit for detecting modulation of an RF signal from the optical pickup caused when the optical pickup encounters a defect such as a flaw in the disc or dust adhering thereon, a circuit for detecting modulation of the RF signal caused when an impact is externally applied to the optical pickup, and an adjusting circuit which decreases the loop gain of the tracking servo circuit when the former modulation is detected and which increases the loop gain when the latter modulation is detected, whereby the responsiveness of the optical pickup is improved and track jumping prevented.

    摘要翻译: PCT No.PCT / JP84 / 00465 Sec。 371日期1985年5月21日第 102(e)日期1985年5月21日PCT提交1984年9月29日PCT公布。 第WO85 / 01605号公报 日期:1985年04月11日。本发明涉及在用于再现记录在光盘上的声音或图像的装置中控制光盘上的光学拾取器的跟踪的跟踪伺服电路的改进。 本发明的特征在于,当光学拾取器遇到诸如盘中的缺陷或灰尘附着在其上的缺陷时,提供用于检测来自光学拾取器的RF信号的调制的电路,用于检测RF的调制的电路 当对光学拾取器外部施加冲击时引起的信号;以及当检测到前一个调制时减小跟踪伺服电路的环路增益并且当检测到后一个调制时增加环路增益的调节电路,由此响应性 改善了光学拾取器并防止了跟踪跳跃。