Patents Assigned to NEC Toshiba Space Systems
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Patent number: 8038101Abstract: Disclosed is an attitude change control system that is designed to efficiently output a torque for attitude change of a space craft using CMGs and realizes a real time CMG driving rule. A CMG gimbal steering law 15 generates target profiles for setting angle and angular velocity for each gimbal by applying an anisotropic weighted gradient method based upon the necessary torque calculated by a feed back controller 13 and a feed forward controller 14 from the angle and angular velocity in the target direction from the attitude navigator 12 and the current angle and angular velocity of the space craft estimated by the attitude estimator 11 as well as the current condition of each gimbal from the CMG 40, thereby controlling the CMG 40 for changing the attitude of the space craft dynamics 50 to the target direction.Type: GrantFiled: February 7, 2008Date of Patent: October 18, 2011Assignee: NEC TOSHIBA Space Systems, Ltd.Inventors: Keita Ogo, Toshio Kamiya, Ken Maeda
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Patent number: 8036283Abstract: In a data/strobe encoding scheme circuit in which data and a strobe signal are transmitted through different lines, changes respectively in the data and the strobe signal are employed as clock signals for a latching operation, and the data is transmitted to a succeeding-stage circuit operating on a second clock signal. The circuit latches predetermined data by an FF circuit and passes a data pair including a signal indicating that the data has been latched and held therein as well as the latched data to the succeeding-stage circuit, activates, if assertion of a signal indicating reception of the data is received from the succeeding-stage circuit, again the FF circuit which has latched the data and has entered a stop state, and receives new data.Type: GrantFiled: April 3, 2007Date of Patent: October 11, 2011Assignees: NEC Soft, Ltd., NEC TOSHIBA Space Systems, Ltd.Inventors: Hideki Irisawa, Hiroki Hihara, Shuichi Moriyama
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Publication number: 20110241955Abstract: Provided is an antenna capable of establishing electrical conductivity between a flange-like short-circuit section of a power supply section and a thin metal plate even in a harsh temperature environment in a space environment. Under a state in which an apical portion of a power supply section is inserted from an outer side of a face plate into a hole for the power supply section of a thin metal plate, a dielectric plate, and a metal plate, a plurality of screws are inserted from the outer side of a flange-like short-circuit section through a plurality of insertion holes of the flange-like short-circuit section, the thin metal plate, and the dielectric plate, and the plurality of screws are threadingly inserted into a plurality of tapped holes of the metal plate so that electrical conductivity between the flange-like short-circuit section and the thin metal plate is established through direct contact.Type: ApplicationFiled: December 10, 2009Publication date: October 6, 2011Applicants: NEC TOSHIBA SPACE SYSTEMS, LTD., JAPAN AEROSPACE EXPLORATION AGENCYInventors: Osamu Amano, Shuichi Koreeda, Yukio Kamata, Makoto Ando
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Patent number: 7981532Abstract: In an Mn-containing perovskite oxide which is a conventional phase-change substance (A1?xBx)MnO3, when the mixing amount x is increased, the transition temperature (Tc) is shifted to higher temperature side, but the slope of a change in the emittance become gentle and ?? (? at higher temperature?? at lower temperature) also become small. In the present invention, the compositional formula of the phase-change substance is the Mn-containing perovskite oxide represented by (A1?xBx)Mn1+yO3 with 0<y in which the Mn ratio is changed from stoichiometric composition, thereby shifting the transition temperature (Tc) to a higher temperature with the emittance characteristic thereof comparable to that of the phase-change substance having the composition which is not changed from stoichiometric composition.Type: GrantFiled: September 28, 2006Date of Patent: July 19, 2011Assignees: NEC Corporation, NEC Toshiba Space Systems, Ltd.Inventors: Toru Mori, Yoshimi Kubo, Akira Okamoto, Yasuyuki Nakamura
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Patent number: 7903840Abstract: The present invention provides an image processing method which can search, at high speed, for image coordinates of a pixel corresponding to a position whose three-dimensional position is known, with respect to a line sensor image in which a surface of an object (i.e. the earth) is continuously taken by a line sensor mounted on a flight vehicle.Type: GrantFiled: August 21, 2007Date of Patent: March 8, 2011Assignee: NEC Toshiba Space Systems, Ltd.Inventors: Hiroshi Oyama, Makoto Maruya
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Publication number: 20110006970Abstract: It is possible to obtain a wide-band feeder circuit a lower conductive plate provided substantially in parallel to an upper conductive plate, a short-circuit portion provided in a concave manner at a central portion of the lower conductive plate, and a countersunk portion provided in a convex manner at a central portion of a short-circuit plate forming a bottom of the short-circuit portion. It is also possible to obtain an antenna including such a wide-band feeder circuit.Type: ApplicationFiled: March 18, 2009Publication date: January 13, 2011Applicants: NEC TOSHIBA SPACE SYSTEMS, LTD., JAPAN AEROSPACE EXPLORATION AGENCYInventors: Osamu Amano, Shuichi Koreeda, Yukio Kamata, Makoto Ando
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Publication number: 20100309570Abstract: An optical device has a reflecting mirror using a particle-dispersed silicon material including silicon carbide and silicon. The reflecting mirror includes a plurality of segments joined to each other by reaction sintering. Producing the segments is easy in comparison with that of a reflecting mirror of one piece. Accordingly, it is possible to reduce probability of breakage of the segments and to shorten process time of production of a reflecting mirror.Type: ApplicationFiled: May 28, 2010Publication date: December 9, 2010Applicant: NEC TOSHIBA Space Systems, Ltd.Inventors: Katsuhiko Tsuno, Shoko Suyama, Yoshiyasu Ito
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Publication number: 20100244565Abstract: Main arrays (MA1-MAm) of solar cells (2) are provided so as to correspond to shunt circuits (SM1-SMm), respectively. Charge arrays (CA1-CAn) are provided so as to correspond to shunt circuits (SC1-SCn) and charging circuits (CH1-CHn), respectively. Each shut circuit operates independently from other shunt circuits, and each charging circuit operates independently from other charging circuits.Type: ApplicationFiled: November 6, 2008Publication date: September 30, 2010Applicants: NEC Toshiba Space Systems Ltd, Japan Aerospace Exploration AgencyInventors: Teiji Yoshida, Tomotake Gondai, Koichi Kibe, Hiroaki Kusawake, Hitoshi Naito, Go Segami
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Patent number: 7701182Abstract: Disclosed is a low noise, non-isolated DC-DC converter for providing a non-inverted (i.e., the same polarity as an input voltage) output voltage of any desired voltage by stepping-up/down the input voltage. It comprises an input coil L1, an input capacitor C1 and a second intermediate coil Lm2 connected in series between both ends of the input voltage source, an output coil L2, an output capacitor C2 and a first intermediate coil Lm1 connected in series between both ends of a load Ro, a switching device S connected between a node a of the L1 and the C1 and a node b of the C2 and the Lm1, and a diode D connected between a node d of the C1 and the Lm2 and a node c of the C2 and the L2.Type: GrantFiled: June 27, 2008Date of Patent: April 20, 2010Assignee: NEC Toshiba Space Systems, Ltd.Inventor: Teiji Yoshida
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Publication number: 20090218449Abstract: In order to control an attitude of a movable object having a flexible member (50) through an attitude maneuver, first, based on vibration of the flexible member at the time of the attitude maneuver, for example, a sampling function including no frequency components equal to or higher than a particular frequency is obtained. With the use of the sampling function, a control target value is created as a previously-frequency-shaping-type feedforward control law. Based on the control target value, attitude control data is created. The attitude control data can be used for the attitude maneuver with respect to the movable object.Type: ApplicationFiled: May 2, 2007Publication date: September 3, 2009Applicants: NEC Toshiba Space Systems, Ltd., Japan Aerospace Exploration AgencyInventors: Toshio Kamiya, Ken Maeda, Tatsuaki Hashimoto, Shinichiro Sakai
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Patent number: 7556502Abstract: A connector includes a plurality of contacts. The connector includes an insulator having a plurality of through-holes for receiving the contacts. A pair of contacts are disposed in each of the through-holes. Since two contacts are disposed in the through-hole in the insulator, even if a fault occurs in one of the contacts, signal transmission in the same line can continuously be used. Moreover, since large areas of contact portions of the contacts are secured even in normal use, the capacity of electric current is increased.Type: GrantFiled: September 5, 2007Date of Patent: July 7, 2009Assignees: ITT Manufacturing Enterprises, Inc., NEC TOSHIBA Space System, LTD.Inventors: Eiichi Nakata, Takashi Kobayashi, Ryo Kameoka, Hiroki Hihara
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Patent number: 7508972Abstract: Disclosed is a topographic measurement system wherein at least one satellite is used to scan the earth surface and send picture frames of a target area captured at different positions to an earth station. The picture frames are combined to produce a number of pairs of frames which constitute a stereoscopic image of the target area. Each frame pair is analyzed according to a number of visual characteristics and evaluated with a set of fitness values representative of the degrees of fitness of the frame pair to topographic measurement of the target area. A total of the fitness values is obtained from each frame pair and compared with the total values of other frame pairs. A frame pair having the highest total value is selected as a best pair. A parallax between the best pair frames is determined to produce first and second sets of line-of-sight vectors for conversion to topographic data.Type: GrantFiled: October 15, 2007Date of Patent: March 24, 2009Assignee: NEC Toshiba Space Systems Ltd.Inventor: Makoto Maruya
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Publication number: 20080311428Abstract: In an Mn-containing perovskite oxide which is a conventional phase-change substance (A1?xBx)MnO3, when the mixing amount x is increased, the transition temperature (Tc) is shifted to higher temperature side, but the slope of a change in the emittance become gentle and ?? (? at higher temperature?? at lower temperature) also become small. In the present invention, the compositional formula of the phase-change substance is the Mn-containing perovskite oxide represented by (A1?xBx)Mn1+yO3 with 0<y in which the Mn ratio is changed from stoichiometric composition, thereby shifting the transition temperature (Tc) to a higher temperature with the emittance characteristic thereof comparable to that of the phase-change substance having the composition which is not changed from stoichiometric composition.Type: ApplicationFiled: September 28, 2006Publication date: December 18, 2008Applicants: NEC CORPORATION, NEC TOSHIBA SPACE SYSTEMS, LTD.Inventors: Toru Mori, Yoshimi Kubo, Akira Okamoto, Yasuyuki Nakamura
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Patent number: 7432131Abstract: To mount a TSOP on an interposer substrate, leads provided to the TSOP are joined to pads of the interposer substrate by a thermosetting conductive resin, and the TSOP exclusive of the leads is joined to ground layers formed in the interposer substrate by a thermosetting conductive resin. The interposer substrates with the TSOPs mounted thereon are stacked in eight layers in such a manner that the TSOPs face downward. Then, leads of the upper interposer substrate are joined to pads formed in the rear face of the lower interposer substrate by a thermosetting conductive resin, so that the interposer substrates adjacent in a vertical direction are connected.Type: GrantFiled: September 8, 2006Date of Patent: October 7, 2008Assignee: NEC Toshiba Space Systems, Ltd.Inventors: Nobuaki Ebihara, Naoshi Suzuki
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Publication number: 20080050012Abstract: The present invention provides an image processing method which can search, at high speed, for image coordinates of a pixel corresponding to a position whose three-dimensional position is known, with respect to a line sensor image in which a surface of an object (i.e. the earth) is continuously taken by a line sensor mounted on a flight vehicle.Type: ApplicationFiled: August 21, 2007Publication date: February 28, 2008Applicant: NEC TOSHIBA SPACE SYSTEMS, LTD.Inventors: Hiroshi OYAMA, Makoto MARUYA
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Publication number: 20070258292Abstract: In a data/strobe encoding scheme circuit in which data and a strobe signal are transmitted through different lines, changes respectively in the data and the strobe signal are employed as clock signals for a latching operation, and the data is transmitted to a succeeding-stage circuit operating on a second clock signal. The circuit latches predetermined data by an FF circuit and passes a data pair including a signal indicating that the data has been latched and held therein as well as the latched data to the succeeding-stage circuit, activates, if assertion of a signal indicating reception of the data is received from the succeeding-stage circuit, again the FF circuit which has latched the data and has entered a stop state, and receives new data.Type: ApplicationFiled: April 3, 2007Publication date: November 8, 2007Applicants: NEC Soft, Ltd., NEC TOSHIBA Space Systems, Ltd.Inventors: Hideki Irisawa, Hiroki Hihara, Shuichi Moriyama
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Patent number: 7149346Abstract: In addition to height data for objects being calculated from stereographic pair images photographed from a satellite, information on outlines is also extracted, and by integrating this height data with the stereographic pair images a three-dimensional database is generated including buildings or else using realistic texture.Type: GrantFiled: November 1, 2002Date of Patent: December 12, 2006Assignee: NEC Toshiba Space Systems, Ltd.Inventor: Akio Oniyama
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Patent number: 7145227Abstract: To mount a TSOP on an interposer substrate, leads provided to the TSOP are joined to pads of the interposer substrate by a thermosetting conductive resin, and the TSOP exclusive of the leads is joined to ground layers formed in the interposer substrate by a thermosetting conductive resin. The interposer substrates with the TSOPs mounted thereon are stacked in eight layers in such a manner that the TSOPs face downward. Then, leads of the upper interposer substrate are joined to pads formed in the rear face of the lower interposer substrate by a thermosetting conductive resin, so that the interposer substrates adjacent in a vertical direction are connected.Type: GrantFiled: July 29, 2004Date of Patent: December 5, 2006Assignee: NEC Toshiba Space Systems, Ltd.Inventors: Nobuaki Ebihara, Naoshi Suzuki
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Publication number: 20060262010Abstract: A GPSR multi-frequency measuring ionospheric delay correction mechanism comprises an ionospheric delay corrective section for estimating an ionospheric delay coefficient based on pseudo-range data measured as an observation on multi-frequency, and for generating an ionospheric delay corrected pseudo-range based on the estimated ionospheric delay coefficient. The pseudo-range data measured as the observation on multi-frequency by using the GPS receiver or the positioning tool is acquired, and the ionospheric delay coefficient is estimated based on the pseudo-range data. An ionospheric delay corrected pseudo-range is then generated using the estimated ionospheric delay coefficient.Type: ApplicationFiled: May 22, 2006Publication date: November 23, 2006Applicant: C/O NEC TOSHIBA SPACE SYSTEMS, LTD.Inventor: Tomoichi Sato
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Patent number: 7080915Abstract: The present invention adopts a particle dispersed silicon material, comprising silicon carbide as dispersion particles, as a mirror substrate, subjects the mirror substrate to mirror finish polishing to form a mirror body, forms a reflecting film on the mirror body to form a mirror, and uses the mirror to form a large aperture optical system.Type: GrantFiled: April 13, 2004Date of Patent: July 25, 2006Assignee: NEC Toshiba Space Systems, Ltd.Inventors: Katsuhiko Tsuno, Shoko Suyama, Tsuneji Kameda, Yoshiyasu Ito