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    ACTUATOR GRAVITY-FREE TEST DEVICE
    1.
    发明专利
    ACTUATOR GRAVITY-FREE TEST DEVICE 失效

    公开(公告)号：JPH01254500A

    公开(公告)日：1989-10-11

    申请号：JP13559488

    申请日：1988-06-03

    Applicant: NAT AEROSPACE LAB ,  TOSHIBA CORP

    Inventor： KIDA TAKASHI ,  YAMAGUCHI ISAO ,  HIRAKO KEIICHI ,  UENO SEIYA ,  TANAKA MASAKI

    IPC: G01M13/00 ,  B64G7/00 ,  F16F15/02 ,  F16F15/03

    Abstract: PURPOSE:To simply the constitution and to enable realization of an accurate gravity-free ground test on a ground, by a method wherein an actuator is driven and controlled according to a weight compensation value and an energy loss compensation value, both calculated from a detecting value. CONSTITUTION:When vibration of a mounting body 11 is detected to output it to a controller 8, a driver signal 18a is produced to output it to a second adder 17. Simultaneously, a rotation angle detecting sensor 12 detects the rotation angle of a rotary shaft 10e, outputs it to an overcurrent compensator 16 through a differentiator 15, and an overcurrent compensation signal 16a is generated to output it to the second adder 17. A detecting signal from the rotation angle detecting sensor 12 is inputted to a gravity compensator 13 to generate a gravity compensation signal 13a which is outputted to a first adder 14. The first adder 14 adds an output signal from the second adder 17 and the gravity compensation signal 13a to output it to a driver 19. When a given amount of a current is fed to a coil (b) of an actuator 10 according to an input signal therefrom, the coil (b) and an inertia mass 10c are driven in a false gravity-free state in which gravity is rendered ineffective.

    VIBRATIONPROOF APPARATUS FOR STRUCTURE
    4.
    发明专利
    VIBRATIONPROOF APPARATUS FOR STRUCTURE 失效

    公开(公告)号：JPS6448945A

    公开(公告)日：1989-02-23

    申请号：JP20486387

    申请日：1987-08-18

    Applicant: NAT AEROSPACE LAB

    Inventor： SANO MASAAKI ,  KOMATSU TAKAHARU ,  KIDA TAKASHI

    IPC: E04B1/19 ,  B64G1/38 ,  E04B1/24 ,  E04B1/34 ,  E04B1/344 ,  E04B1/58 ,  F16F15/03

    Abstract: PURPOSE: To damp vibrations by forming a vibration-isolation device which is provided with a first permanent magnet arranged inside a hollow housing, a coil wound on a second permanent magnet sliding along a core extending through the center, and a current supply portion for the coil. CONSTITUTION: A column member 2 of a vibration-isolation device 3 is formed by hermetically coupling a non-magnetic housing 4 and both ends of a core 5 extending through the center in the housing 4. Further, a first permanent magnet 6 is arranged along the internal wall of the housing 4, and a slidable permanent magnet 7 is disposed along the peripheral surface of the arbor 5, followed by winding a coil 8 on the magnet 7. Then, a spring 9 formed of a conductive material is provided such that one end thereof is in contact with the magnet 7 and the other end thereof is in contact with an end wall of the housing 4. Further, the one end of the spring is electrically connected to the coil 8 and the other end of the same is connected to a power source via a current supply control arithmetic section. In this manner, driving current applied to the coil 8 having a dynamic mass is made into a special pulse, whereby a large braking force can be obtained with respect to ultra low frequency vibrations.

    MAGNETIC BEARING
    6.
    发明专利
    MAGNETIC BEARING 失效

    公开(公告)号：JPS58137618A

    公开(公告)日：1983-08-16

    申请号：JP2013982

    申请日：1982-02-10

    Applicant: NAT AEROSPACE LAB ,  MITSUBISHI ELECTRIC CORP

    Inventor： OOKAMI YOSHIAKI ,  KIDA TAKASHI ,  HAGIWARA SHIROU ,  TSUCHIYA KAZUO ,  YABUUCHI YOSHINORI

    IPC: F16C32/04 ,  F16C39/06

    Abstract: PURPOSE:To provide a magnetic bearing capable of withstanding the centrifugal force when rotating at a high speed by shifting permanent magnets to the stator side and constituting a magnetic path so that the magnetic flux of the permanent magnet is superimposed on that of the electromagnet. CONSTITUTION:A hollow cylindrical electromagnets 3 are provided on the side of the stator 6, and hollow cylindrical permanent magnets 4A and 4B magnetized in the axial direction are provided at both upper and lower ends of the electromagnet 3. On the rotor side, are provided magnetic poles 2 which are in linkage with the magnetic flux due to the permanent magnets 4A and 4B and further with the magnetic flux due to the electromagnets, through gaps. When the magnetic flux (solid line) of the permanent magnets and the magnetic flux (dotted line) of the electromagnets are superimposed on each other and an exciting current is supplied so that the magnetic flux of the electromagnets flows in the direction shown by arrow indicated by dotted line, the magnetic flux of a gap g2 is decreased, and that of a gap g3 is increased, thus the upward attractive force being strengthened. As described above, since the permanent magnets have been shifted to the stator side, the permanent magnet does not undergo the influence of the centrifugal force.

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