公开(公告)号：JPS60158486A

公开(公告)日：1985-08-19

申请号：JP1209584

申请日：1984-01-27

Applicant: NAT AEROSPACE LAB ,  NIPPON AVIONICS CO LTD

Inventor： OKABE MASANORI ,  TANAKA TAKASHI ,  ISU HISANORI ,  SATOU MASAHARU ,  YAMASHITA YUKIO ,  KOSUGI TETSUO ,  NAKAI KAZUNARI

IPC: G09G5/06 ,  G09G1/28

公开(公告)号：JPS60111049A

公开(公告)日：1985-06-17

申请号：JP21911183

申请日：1983-11-21

Applicant: NAT AEROSPACE LAB

Inventor： MITANI TOORU ,  NIIOKA TAKASHI

IPC: F02K9/26 ,  F02K9/00 ,  F02K9/32 ,  F02K9/38

Abstract: PURPOSE:To control a secondary flame in an efficient manner, by emitting and mixing a combustion inhibitor in and around a nozzle skirt outlet end where exhaust gas of a rocket and the atmosphere are contacted with each other, while leading the combustion inhibitor into the peripheral part of an exhaust gas stream. CONSTITUTION:A gaseous combustion inhibitor is stored in a tank 3 and emitted to a peripheral part of an exhaust gas stream 6 being high in temperature and including unburnt fuel from a combustion controlling nozzle 5 being annularly installed in and around an outlet end 2 of a nozzle skirt 1 by way of a control valve 4. Here, at a region 9 where the gas stream 6 and an air stream 8 are mixed, usually an oxidizing exothermic reaction occurs most actively and a secondary flame is made up there. And, this region is one where thickness of the combustion flame is efficiently controlled and finally extingushed. Thus, since the combustion inhibitor is not added to a solid propellant, problems on a drop in combustion capacity or physical properties and manufacturing the propellant all can be solved.

公开(公告)号：JPS6098888A

公开(公告)日：1985-06-01

申请号：JP20693183

申请日：1983-11-04

Applicant: NAT AEROSPACE LAB ,  MITSUBISHI ELECTRIC CORP

Inventor： OKAMOTO OSAMU ,  INOUE MASAO

IPC: H02P6/08 ,  H02P6/06

Abstract: PURPOSE:To improve the reliability of a DC motor by intermittently driving a transistor for driving a drive coil, and controlling a torque by regulating the ON time at this time corresponding to a torque command signal, thereby eliminating the transistor of large capacity and large size. CONSTITUTION:A motor control circuit 20 has a rotating direction control circuit 21 and a torque control circuit 29. The control circuit 21 selectively drives two of transistors 10-15 to decide the rotating direction of a motor. The control circuit 29 has semiconductor switching elements 22-27 provided between the rotating direction control circuit 21 and the bases of the transistors 10- 15, and a pulse width modulation drive circuit 28 for controlling ON and OFF the elements 22-27. The ON times of the transistors 10-15 are controlled in response to the magnitude of the torque command signal by the drive circuit 28.

公开(公告)号：JPS6091711A

公开(公告)日：1985-05-23

申请号：JP20033883

申请日：1983-10-26

Applicant: NAT AEROSPACE LAB

Inventor： TADA AKIRA

IPC: H03H17/00 ,  H03H17/02 ,  H03H17/06

Abstract: PURPOSE:To attain sampling while eliminating aliasing by repeating an integral number of stages of processings comprising the moving average processing using binomial coefficients used as weights for a quantized discrete time series data and the processing extracting data in the rate of 1/2. CONSTITUTION:In a fundamental processing circuit 11, a clock signal 2 stores an inputted odd number order of discrete signal to a memory M1 and clock signal 1 sotres an inputted even number order of discrete signal to a memory M2. An output of the memory M1 is used as an input to a full adder FA1 and an output of the memory M2 is used for an input to the full adder FA1 while being weighted by a binomial coefficient. An output of the full adder FA1 and the discrete signal are added at a full adder FA2, and the result is multiplied by 1/4, then a sample signal is obtained. Similar processings are conducted also in a fundamental processing circuit 12, the sample signal is extracted sequentially in the rate of 50% at higher stages and the filtering digital smapling is executed without being affected by aliasing.

公开(公告)号：JPS6071931A

公开(公告)日：1985-04-23

申请号：JP17991383

申请日：1983-09-28

Applicant: NAT AEROSPACE LAB

Inventor： HOZUMI KOUICHI ,  HASHIMOTO NOBORU

IPC: G01M1/10

Abstract: PURPOSE:To obtain a device which facilitates setting of an object to be measured and has a high precision by fixing the upper end of a rotating cylinder to the lower end of a wire and providing a supporting table of the object to be measured in the upper end of the rotating cylinder and attaching the rotating cylinder to an outside frame so that it is turned only in the rotation direction. CONSTITUTION:The upper end of a wire 2 is stuck to the outside frame, and the lower end is fixed to the center of the lower bottom of a rotating cylinder 5. The rotating cylinder 5 surrounds the wire 2 and is extended upward and crosses the upper side part of an outside frame 4 and is terminated in the upper part of the outside frame 4, and a supporting table 6 is attached on the upper bottom of the rotating cylinder 5. Stabilizators 8 and 8' and bearing stoppers 7 and 7' are provided in upper and lower ends of the rotating cylinder 5 to permit the rotating cylinder 5 to turn only in the rotation direction. In case that a moment of inertia is measured by a measuring device constituted in this manner, an object having a known moment of inertia is set on the supporting table 6, and the period of the rotative oscillation of the rotating cylinder 5, and a coefficient of torsional rigidity of the wire 2 is determined, and thereafter, this coefficient is used to the moment of inertia of an optional object to be measured.

公开(公告)号：JPS6011746A

公开(公告)日：1985-01-22

申请号：JP11931383

申请日：1983-06-30

Applicant: TOSHIBA KK ,  NAT AEROSPACE LAB

Inventor： SHIMAMOTO YOSHIHARU

IPC: F16F15/30 ,  B64G1/28 ,  B64G1/32 ,  B64G1/36 ,  F16C32/04 ,  F16C39/06 ,  F16F15/315 ,  H02K7/02 ,  H02K7/09

Abstract: PURPOSE:To reduce the fly wheel device to compact size and light weight and to increase the angular momentum of a rotating portion per unit weight by disposing a radial magnetic gap-type axial support portion and fixing a rotation side support element of the support portion to the outer peripheral portion of a fly wheel body so as to be axially passive and radially active. CONSTITUTION:An axial support portion 3 is disposed between a base 1 and a fly wheel body 2. The support portion 3 is provided with a rotation side support element 19 where ring-shaped permanent magnets 22, 24 are disposed and with a base side element 20 where ring-shaped permanent magnets 26, 28 are disposed through a magnetic gap G. Plate yokes 15 on base 1 side are peripherally disposed at four places, and a solenoid coil 16 is wound round each yoke 15. A sleeve 11 of the base 1 is provided with four displacement sensors 34 for detecting the radial distance from the wheel body 2, which are peripherally arranged at equal intervals. A change of the magnetic gap G is detected by the sensors 34 and the change is adjusted to be restored to its initial state by the solenoid coils 16. A stator 38 of a base motor 36 is fixed to a collar portion 12 of the base 1.

公开(公告)号：JPS58161985A

公开(公告)日：1983-09-26

申请号：JP4536882

申请日：1982-03-19

Applicant: NISSAN MOTOR ,  NAT AEROSPACE LAB

Inventor： KAWASAKI KAZUNORI ,  YAMAWAKI HAJIME ,  NOMURA SHIGEAKI

IPC: C04B38/08 ,  B64G1/58

公开(公告)号：JPS5852526A

公开(公告)日：1983-03-28

申请号：JP15177981

申请日：1981-09-24

Applicant: NAT AEROSPACE LAB ,  NIPPON CHEMICAL IND

Inventor： FUJII SHIYOUICHI ,  GOMI MITSUO ,  JIN YASUHARU

IPC: G01J3/12 ,  G01J3/44 ,  G01N21/65

Abstract: PURPOSE:To obtain a high spectral function, by constituting a multipath reflection part by opposing the reflection surfaces of 2 dichroic mirrors to each other, making laser light execute multipath reflection between these mirrors, and selectively fetching the laser light having desired wavelength. CONSTITUTION:As for the first and second dichroic mirrors 3, 3', those which reflect about 100% of laser light having wavelength desired in advance and transmit other unnecessary wavelength, for instance, by 80% or so are selected, and these mirrors 3, 3' are provided so that each reflection surface of them is turned to the inside and is opposed to each other, and a multipath reflection part 2 is constituted of them. Also, on each back part of these mirrors 3, 3', laser dampers 4, 4' are provided, and are constituted so as to absorb unnecessary laser light 1a, 1b which has transmitted the mirror. In this way, it is possible to fetch laser light 1c having desired wavelength, from in laser light 1 containing various wavelength, by repeating the reflection.

公开(公告)号：JPS57212350A

公开(公告)日：1982-12-27

申请号：JP9630681

申请日：1981-06-22

Applicant: NAT AEROSPACE LAB

Inventor： SHINNO MASAYUKI ,  YATSUYANAGI NOBUYUKI ,  KUMAKAWA AKINAGA ,  SUZUKI AKIO ,  GOMI HIROMI ,  SAKAMOTO HIROSHI ,  SASAKI MASAKI

IPC: G01M15/14 ,  F02K9/64 ,  F02K9/96

Abstract: PURPOSE:To improve the critical heat flux density remarkably by a method wherein a saw-toothed array of fins is provided on a cooling surface and a mixing boiling property generated on the fin is utilized. CONSTITUTION:The combustion chamber is formed by the combination of annlar segments A having the cooling water flow paths such as a cooling water inlet pipe 1, an outlet pipe 2, a cooling water introducing pipe 3, an annular path 7 and the like and is provided with paths for fuel F, an oxidizer 0 and the cooling water CW. The cooling surface 5 of the alley of saw-toothed fin is formed on the surface of the combustion chamber side of the annular path 7 and the saw- toothed fin 8 on the cooling surface 5 of the alley of this saw-toothed fins is formed so as to have an apex angle of 60 deg., a height of 0.5mm. and a pitch of 0.6mm. substantially. Further, one of this path 7 is connected to the cooling water inlet pipe 1 while the other thereof is connected to the outlet pipe 2. According to this method, the cooling efficiency thereof may be improved remarkably.

公开(公告)号：JPS57164588A

公开(公告)日：1982-10-09

申请号：JP3907082

申请日：1982-03-12

Applicant: NAT AEROSPACE LAB

Inventor： TAKIZAWA MINORU

IPC: H01S3/083 ,  G01C19/64 ,  G01C19/66

Abstract: PURPOSE:To obtain high accuracy laser gyro by providing two ring laser devices for emitting one-directional progressive wave which rotates around an input axis i.e. a detected body, and emit laser light in the direction opposite with each other and a photo detector for detecting beat frequency of laser output. CONSTITUTION:To measure the angular velocity or displacement of moving bodies as detected bodies, two ring laser devices for one directional progressive wave URL1, URL2 through which wave of each devices progresses in the opposite direction to the input axis IA are equiped with a photo detector ROD for detecting beat frequency of the output of the both laser. Each URL has a laser oscillator LT, total reflection mirrors PM, a partly transmitting mirror TM and one-directional progressive wave device UD, while the ROD has a total reflection mirror PM, beam splitter BS and photo detector PD. Thus, high accuracy is contrived without the occurrence of standing wave at micro input angular velocity.