公开(公告)号：JPH02280652A

公开(公告)日：1990-11-16

申请号：JP10003989

申请日：1989-04-21

Applicant: NAT SPACE DEV AGENCY ,  HITACHI LTD

Inventor： MATSUSHITA TADASHI ,  FURUKAWA MASAO ,  SAITOU IKUHIRO ,  MATSUSHITA OSAMI ,  TAKAGI KIYOUJI

IPC: H02K33/12 ,  F25B9/14 ,  H02K33/00

Abstract: PURPOSE:To perform highly accurate centering and to make a linear motor unit compact by arranging a detector for detecting displacement of linear motor shaft in the linear motor shaft and arranging an electromagnetic bearing at the outer diameter side of the linear motor shaft. CONSTITUTION:In a linear motor unit mainly composed of a linear motor shaft 1 and a linear drive motor 2 for reciprocating the linear motor shaft 1, an electromagnetic bearing 3 is arranged at the inside of the linear motor 2 in order to control radial force such that the linear motor shaft 1 is held in neutral position. Displacement detectors 4 for controlling the electromagnetic bearing 3 are arranged at the inside of the linear motor shaft 1 at two positions in X and Y directions with respect to the electromagnetic bearing, and displacement of the linear motor shaft 1 is detected at the inner diameter side. The displacement detector 4 is arranged on a displacement detector fixing member 5 arranged in the linear motor shaft 1. By such arrangement, centering can be carried out with high accuracy.

公开(公告)号：JPH02268206A

公开(公告)日：1990-11-01

申请号：JP8973589

申请日：1989-04-11

Applicant: NAT SPACE DEV AGENCY ,  TOSHIBA CORP

Inventor： HISADA YASUMASA ,  AKIBA TOSHIKATSU ,  TSUTSUMI YUJI

IPC: G01B11/24 ,  G01B11/245

Abstract: PURPOSE:To measure the displacement of an object to be measured located at a distant place readily and highly accurately by reflecting a light beam with the reflecting member of the material to be measured, and comparing a position of measurement based on the displacement of the reflected light with an ideal position which is stored beforehand. CONSTITUTION:Laser light A1 is inputted into a corner cube reflector 2a through a variable mirror 4 and a reflector 5a. Reflected light A2 from the reflector is inputted into linear CCD sensors 12a and 12b through beam splitters 10a and 10b. The displacements in the horizontal and vertical directions are detected. The position of the measuring point where the reflector 2a is arranged is operated with a signal processing part 13. Meanwhile, the ideal position of the measuring point is computed based on the angle of the mirror 4 which is detected with a mirror-angle detecting part 15 and the ideal shape of a reflecting mirror surface 1. Said position is compared with the measuring position of the processing part 13, and the amount of displacement is measured. In this way, the object to be measured located at a distant place can be readily measured highly accurately.

公开(公告)号：JPH02225809A

公开(公告)日：1990-09-07

申请号：JP4528989

申请日：1989-02-28

Applicant: NAT SPACE DEV AGENCY ,  TOKYO SHIBAURA ELECTRIC CO

Inventor： KATAKI TSUGUHIKO ,  TSUJIHATA AKIO ,  FURUKAWA KOICHI ,  YAMADA KAZUHISA ,  OKA SHINJI

IPC: E04B1/58 ,  B64G1/22 ,  F16B7/04 ,  F16B7/20

Abstract: PURPOSE:To prevent peeling with a simple structure by composing a joint of a core joint on which an engagement part and connecting plates of a framework structure member are projected, a sub-joint having first and second contact parts contacted to the core joint, and a crip part which is circularly contacted to the second contact part and fitted at its outer periphery in the framework structure member. CONSTITUTION:An engagement part 51A for fitting an FRP pipe and spiral connecting plates 51b are arranged on a core joint 51. On a sub-joint 52a contacting to the core joint, a first contacting part 52a corresponding to the engagement part 51a and a second contacting part 52b are formed in response to one side of each of the contact plates 51b. Two of the sub-joints 52 are in contact to the connecting plate 51b while sandwiching it, and reinforcing rings 54 are fixed to both ends thereof. Then, crip members 53 are circularly connected to the second contact part 52b to form an engagement part of an FRP pipe. It is therefore possible to surely prevent peeling with a simple structure and thereby to improve strength.

公开(公告)号：JPH02217757A

公开(公告)日：1990-08-30

申请号：JP3533989

申请日：1989-02-15

Applicant: NAT SPACE DEV AGENCY ,  HITACHI LTD

Inventor： MATSUSHITA TADASHI ,  FURUKAWA MASAO ,  ISHII MASAHARU ,  FUKUDA TAMIO ,  NAKAMURA YOZO

IPC: F25B9/14

Abstract: PURPOSE:To prevent an increased dead volume and striking of a piston with a cylinder end due to positional variations of a variation (reciprocation) center by keeping the vibration center position unchanged or shifting the same to desired position by the control of a DC component of an input current to a linear reciprocation electric motor. CONSTITUTION:Voltage outputs (displacement signals) from respective displacement measurement means 2, 4 are incorporated as input signals into a vibration center position arithmetic unit 5 and an amplitude arithmetic unit 6, whereby there are estimated vibration center positions and amplitudes of a piston and a displacer, respectively. A comparator 7, which also serves as a controller, compares the respective vibration center positions of the piston and the displacer 80 estimated by the arithmetic unit 5 with respective target positions, and instructs, if the vibration center positions have been shifted from the target positions to a negative side, a DC voltage shifter 9 or 11 to provide a positive offset (DC component) to voltage from a motor power supply 8 or 10, while it, if those positions have been shifted to a positive side, instructs the same to provide a negative offset.

公开(公告)号：JPH02204199A

公开(公告)日：1990-08-14

申请号：JP2349589

申请日：1989-02-01

Applicant: NAT SPACE DEV AGENCY ,  MITSUBISHI ELECTRIC CORP

Inventor： YODA SHINICHI ,  ITOGA KENJI ,  IKEGAMI KAZUNORI

IPC: B64G1/66 ,  B64G4/00

Abstract: PURPOSE:To stir samples in a furnace when a floating article is the floating furnace by arranging a pair of opposed electrodes and arranging the electromagnets at the prescribed positions on the outer parts of the electrodes and revolving the floating article arranged between the electrodes by the electromagnetic inductive action of the electromagnets. CONSTITUTION:The floating device as cosmos environment utilizing device consists of a pair of disc-shaped electrodes 1 and 2 which are oppositely arranged on a same axis center line, a pair of ring-shaped solenoids 3 and 4 which are oppositely arranged onto the outer periphery of the respective electrodes 1 and 2, and the electromagnets 6 - 9 for revolution which are arranged at equal intervals at four positions on the outer periphery of one electrode 3. A floating substance 5 is set standstill by applying the equal potential onto the disc-shaped electrodes 1 and 2 and applying the potential having the equal sign to the electrodes 1 and 2 onto the ring-shaped electrodes 3 and 4, and then the substance 5 is floated by applying the electric charge having the equal sign to the electrodes 1 - 4 onto the substance 5. Further, the substance 5 is revolved by allowing the ac electric current having the equal cycle and amplitude to the electromagnets 6 - 9 to flow, having the phase shifted by 90 deg..

公开(公告)号：JPH02182599A

公开(公告)日：1990-07-17

申请号：JP111789

申请日：1989-01-06

Applicant: NAT SPACE DEV AGENCY ,  MITSUBISHI ELECTRIC CORP

Inventor： ENDO EIICHI ,  MUKAI HISAYUKI ,  MICHIOKA HIDEKAZU ,  KISHIMOTO TAKESHI ,  KOYAMA AKIO

IPC: B64G1/64

Abstract: PURPOSE:To reduce a contact impart in a translation direction by a method wherein, in a title mechanism loaded on an artificial satellite, an extension mechanism is mounted to a first space craft through a cushioning mechanism having a leaf spring and a damper and the degree of freedom of rotation and translation, and capture mechanisms coupled to the tip of the extension mechanism and a second space craft are provided. CONSTITUTION:When an external force is exerted on a moving plate 12, a leaf spring 5b is resiliently displaced, a damper 4 is expanded and contracted in a longitudinal direction, and rotational and translational movement of a cushioning mechanism 6 are provided. A plate 10 on the stationary side of the cushioning mechanism 6 is secured to a space craft 1, and a moving plate 12 is mounted to a relay plate 11 so that it is positioned in the vicinity of the center in a longitudinal direction of the extension mechanism 7. Rupture mechanisms 8 are formed to the tip of the extension mechanism 7 and a space craft 2. This constitution enables relaxation of an impact in a rotation direction and a translation direction.

公开(公告)号：JPH02106500A

公开(公告)日：1990-04-18

申请号：JP25880088

申请日：1988-10-14

Applicant: NAT SPACE DEV AGENCY ,  TOSHIBA CORP

Inventor： HISADA YASUMASA ,  ITO YASUYUKI ,  YAMADA KAZUHISA ,  NUKADA HIDEKI

IPC: B64G1/22 ,  B64G7/00 ,  H01Q1/28

Abstract: PURPOSE:To permit the correct antenna development test on the ground by detecting the shift of a reflecting plate by the cooperation of a detected part and the detection part of a carrier and shifting the carrier on a guide rail in correspondence with the shift so that the gravity compensating tension corresponds to the gravity direction, in the development of the reflecting plate. CONSTITUTION:A plurality of guide rails 20 which constitute a gravity compensating system are laid in correspondence with the developed passages of a plurality of reflecting plates 11 of a development antenna 10, and each carrier 21 is installed in shiftable ways onto each guide rail 20. Each carrier 21 is equipped with a drive motor built in, and a plurality of pulleys 22 are arranged in the lower edge part of the drive motor in correspondence with the guide rail 20. A string-shaped suspending member 23 is laid onto each pulley 22, and the reflecting plate 11 which is development-driven by a development driving mechanism is installed at one edge, and a weight member 24 for compensating gravity is installed at the other edge. The relative position change is detected by the luminous diode 25 of the reflecting plate 11 and the detection part 27 of the carrier 21, and a driving motor for the carrier 21 is drive-controlled according to the detection signal.

公开(公告)号：JPH02106499A

公开(公告)日：1990-04-18

申请号：JP25879988

申请日：1988-10-14

Applicant: NAT SPACE DEV AGENCY ,  TOSHIBA CORP

Inventor： HISADA YASUMASA ,  ITO YASUYUKI ,  YAMADA KAZUHISA ,  NUKADA HIDEKI

IPC: B64G1/22 ,  B64G7/00 ,  H01Q1/28

Abstract: PURPOSE:To permit the correct antenna development test on the ground by shifting a carrier along a guide rail in correspondence with the shift of a suspending member and setting the gravity compensating tension by a suspended member laid onto a pulley and a weight member in the gravity direction, in the development of a reflecting plate. CONSTITUTION:A plurality of guide rails 20 which constitute a gravity compensating system are laid in correspondence with the developed passages of a plurality of reflecting plates 11 of a development antenna 10, and each carrier 21 is installed in shiftable ways onto each guide rail 20. Each carrier 21 is equipped with a drive motor built in, and a plurality of pulleys 22 are arranged in the lower edge part of the drive motor in correspondence with the guide rail 20. A string-shaped suspending member 23 is laid onto each pulley 22, and the reflecting plate 11 which is development-driven by a development driving mechanism is installed at one edge, and a weight member 24 for compensating gravity is installed at the other edge. The shift quantity of the suspended member 23 in development is detected by a potentiometer 26 which is interlocking with a detecting member 25, and a driving motor for the carrier 21 is drive- controlled according to the detection signal.

公开(公告)号：JPH0212403B2

公开(公告)日：1990-03-20

申请号：JP11221084

申请日：1984-06-02

Applicant: NAT SPACE DEV AGENCY

Inventor： MORIMOTO SHIGERU ,  HISADA YASUMASA ,  ITO YASUYUKI

IPC: H01Q1/28 ,  G01S7/02 ,  G01S7/03 ,  G01S7/40 ,  G01S13/90 ,  H01Q3/02 ,  H01Q15/14 ,  H01Q21/08

公开(公告)号：JPH021272B2

公开(公告)日：1990-01-10

申请号：JP18715081

申请日：1981-11-20

Applicant: NAT SPACE DEV AGENCY

Inventor： KIRIMOTO TETSUO ,  OOHASHI YOSHIMASA ,  KONDO TOMOMASA

IPC: G01S7/40 ,  G01S13/90