公开(公告)号：US11916261B2

公开(公告)日：2024-02-27

申请号：US17547206

申请日：2021-12-09

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Chaenam Im ,  Jae In Lee ,  Hyunki Yoon ,  Yusong Choi ,  Jang Hyeon Cho

IPC: H01M6/36 ,  H01M50/509 ,  H01M6/50

CPC classification number: H01M6/36 ,  H01M6/5038 ,  H01M6/5088 ,  H01M50/509

Abstract: Provided are a thermal battery system and an ignition method of the same, wherein the thermal battery system includes: a thermal battery assembly including a plurality of thermal batteries arranged in series and in parallel; an ignition circuit connected to the plurality of thermal batteries in the thermal battery assembly; and a control unit configured to control the ignition circuit such that each of the plurality of thermal batteries in the thermal battery assembly is selectively ignited, wherein the control unit is configured to selectively ignite one of the plurality of thermal batteries in an active matrix manner by controlling an ignition circuit.

公开(公告)号：US20240056726A1

公开(公告)日：2024-02-15

申请号：US18212917

申请日：2023-06-22

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Yub JE ,  Soo-Hyun LIM ,  Yo-Han CHO ,  Jeong-Min LEE ,  Hee-Seon SEO

IPC: H04R1/28 ,  H04R17/10

CPC classification number: H04R1/2811 ,  H04R17/10

Abstract: Proposed is a flextensional low-frequency sound projector including a piezoelectric actuator including a piezoelectric stack formed by stacking piezoelectric element and generating vibration in a lengthwise direction in response to an electrical signal that is input, and a stave mounted on the piezoelectric actuator in such a manner as to encompass an outer surface of the piezoelectric actuator and generating the vibration in the lengthwise direction, which is generated by the piezoelectric actuator, as vibration in a lateral direction perpendicular to the outer surface of the piezoelectric actuator, wherein the stave activates two vibration modes that use different resonance frequencies. The flextensional low-frequency sound projector that utilizes two vibration modes results from improving an existing flextensional low-frequency sound projector that is driven in a single vibration mode and thus has a narrow frequency bandwidth.

公开(公告)号：US11883956B2

公开(公告)日：2024-01-30

申请号：US17110114

申请日：2020-12-02

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Man Bok Hong ,  Gwang Tae Kim ,  Yong Cheol Kim ,  Jun Woo Kim

IPC: A61F5/01 ,  B25J9/00 ,  A61H1/02

CPC classification number: B25J9/0006 ,  A61F5/013 ,  A61H1/0274 ,  A61H2201/165 ,  A61H2201/1671

Abstract: The wearable gravity compensation apparatus capable of multiple degrees of freedom of movement according to an example embodiment includes a main frame configured to be fixable to a back of a user, a base link rotatably connected to the main frame around a first rotation axis, a front extension link having one end rotatably connected to the base link around a second rotation axis intersecting the first rotation axis, the front extension link extending to a front of the base link, a rear extension link connected to the base link, the rear extension link extending to a rear of the base link, a guide positioned above the base link, the guide provided on the main frame, a slider configured to be slidable along the guide, a gravity compensation elastic member having one end fixed to the main frame, and the other end fixed to the slider.

公开(公告)号：US20240026840A1

公开(公告)日：2024-01-25

申请号：US18223433

申请日：2023-07-18

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Seung Gyo JANG ,  Doo Hee HAN ,  Young Hwa KWON

IPC: F02K9/95 ,  F02K9/38

CPC classification number: F02K9/95 ,  F02K9/38

Abstract: The present invention relates a safety ignition device for a high altitude dual pulse motor according to the present invention, and can prevent accidental ignition of an ignition device or a propulsion engine while efficiently using a space by installing the safety ignition device in front of a combustion pipe, increase the reliability of ignition, and maintain the air tightness of the inside of the propulsion engine and the ignition device even in a high altitude environment.

公开(公告)号：US20230299868A1

公开(公告)日：2023-09-21

申请号：US18122966

申请日：2023-03-17

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Ju Hyung LEE ,  Chul Hee CHOI ,  Byung Seok WOO

IPC: H04K1/00 ,  H04K1/04

CPC classification number: H04K1/003 ,  H04K1/04

Abstract: Systems, devices, methods, and instructions for transmitting a signal by an electronic apparatus that include generating transmission data and pseudo-random data corresponding to the transmission data, setting a first pseudo time delay interval for the transmission data and a second pseudo time delay interval for the pseudo-random data, acquiring a data signal for transmitting the transmission data to correspond to the first pseudo time delay interval and a pseudo-random signal for transmitting the pseudo-random data to correspond to the second pseudo time delay interval, and transmitting an overlapping signal including the data signal and the pseudo-random signal.

公开(公告)号：US20230239035A1

公开(公告)日：2023-07-27

申请号：US18157396

申请日：2023-01-20

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Jae Don PARK ,  Jong Sung PARK ,  Yong Woo PARK ,  Sungho PARK

IPC: H04B7/185 ,  H04B7/06

CPC classification number: H04B7/18502 ,  H04B7/0632

Abstract: An aerial repeater position determination apparatus is proposed. The apparatus may include a transceiver configured to acquire a height of an aerial repeater, a position of a source node, and a position of a mobile communication base station. The apparatus may also include an initial position determination processor configured to determine an initial position by checking a position at which a signal to noise ratio (SNR) of a signal received by the mobile communication base station is maximized on a first plane parallel to the ground and including the aerial repeater, on the basis of the position of the source node, the position of the mobile communication base station, and the height of the aerial repeater.

公开(公告)号：US20230216214A1

公开(公告)日：2023-07-06

申请号：US17686961

申请日：2022-03-04

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： SeYoung KANG ,  Won Zoo CHUNG ,  SeonKyo KIM ,  CheolSun PARK

IPC: H01Q21/08 ,  G06N20/00

CPC classification number: H01Q21/08 ,  G06N20/00

Abstract: This application relates to a method for designing a non-uniformly spaced linear array antenna. The method includes setting a cost function for spacing between a plurality of antennas comprised in a linear array and for weights for each of the antennas, with limits on side lobe level and bandwidth, and obtaining an initial best solution vector for the cost function under an initial environmental condition based on learning parameters. The method may further include updating the initial best solution vector through reinforcement learning in which a reward value is computed by comparing a sub best solution vector with each of a plurality of solution vectors for the cost function under a sub environmental condition based on the initial best solution vector. The method may further include determining the spacing between the plurality of antennas and the weights for each of the antennas based on the updated initial best solution vector.

公开(公告)号：US11650287B2

公开(公告)日：2023-05-16

申请号：US17382698

申请日：2021-07-22

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Jeil Jo ,  Junghoon Lee ,  Hongkyun Yu ,  Unseob Jeong

IPC: G01S7/38 ,  H04K3/00

CPC classification number: G01S7/38 ,  H04K3/43 ,  H04K3/82

Abstract: This application relates to a jamming signal generating apparatus. In one aspect, the jamming signal generating apparatus includes a signal analyzer configured to perform measurement and analysis of a radar reception signal, and a radio frequency (RF) source signal output device configured to receive the radar reception signal and to output a video signal by reflecting the measurement and the analysis. The jamming signal generating apparatus may also include a frequency up converter configured to output a jamming signal and a jamming transmission signal measurement device configured to receive the video signal and the jamming signal and to obtain a jamming to signal ratio (JSR).

公开(公告)号：US20230076543A1

公开(公告)日：2023-03-09

申请号：US17690978

申请日：2022-03-09

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Young June Shin ,  Man Bok Hong ,  Gwang Tae Kim ,  Yongcheol Kim ,  Hanseung Woo ,  Sanghun Ju

IPC: A61H3/00 ,  H02K7/10 ,  H02K7/116 ,  B25J9/00 ,  B25J9/10

Abstract: A flexible wearable robot for assisting with a walking motion of a user may include a thigh strap to be worn to enclose a thigh portion of a user, a shank strap to be worn to enclose a shank portion of the user, a driver to be worn on a back or waist portion of the user to provide a driving force for assisting with a walking motion of the user, a first driving wire with one end connected to the thigh strap and the other end connected to the driver to receive tension, a second driving wire with one end connected to the shank strap and the other end connected to the driver to receive tension, and a controller to control a drive of the driver to selectively apply tension to at least one of the first driving wire and the second driving wire.

公开(公告)号：US20230057138A1

公开(公告)日：2023-02-23

申请号：US17456529

申请日：2021-11-24

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Hwaseong LEE ,  Jeongchan PARK ,  Changon YOO ,  Jingoog KIM ,  Yeojeong YOON ,  Ilhoon JUNG ,  Sung Jin PARK

IPC: G06F21/71 ,  G06N20/20

Abstract: This application relates to an apparatus for identifying an abnormal processor. In one aspect, the apparatus includes a memory information collection part that collects memory region information and dynamic library information of a memory. The apparatus may also include a first identification part that identifies an abnormal processor by using a first machine learning model pre-trained based on the memory region information. The apparatus may further include a second identification part that identifies an abnormal processor by using a second machine learning model pre-trained based on the dynamic library information. The apparatus may further include a determination part that determines a final abnormal processor based on either the abnormal processor identified using the first machine learning model or the abnormal processor identified using the second machine learning model.