公开(公告)号：US20230150655A1

公开(公告)日：2023-05-18

申请号：US18055807

申请日：2022-11-15

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jung Jin LEE

IPC: B64C25/58 ,  B64C25/04 ,  B64C25/06

CPC classification number: B64C25/58 ,  B64C25/04 ,  B64C25/06 ,  B64C2025/325

Abstract: The present disclosure relates to a leaf spring type landing gear mounted on a lower portion of a fuselage of an aircraft, and more particularly, to a leaf spring type landing gear having improved performance for mitigation and absorption of shocks, including: a first frame connected to the fuselage and bent to have a circle center below; a second frame connected to the first frame; and a third frame connected to the second frame and at least partially bent to have a circle center below, wherein the second frame includes a 2-1st frame and a 2-2nd frame having circle centers formed in opposite directions and is formed to be bent in an S shape.

公开(公告)号：US20180120208A1

公开(公告)日：2018-05-03

申请号：US15801870

申请日：2017-11-02

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jung Jin LEE ,  Joong Wook KIM

IPC: G01N3/303 ,  G01M7/08 ,  G01N3/40

Abstract: A drop testing apparatus is provided. The drop testing apparatus includes a plate connected to an external crane, a magnet holder provided at one end of the plate and fixed to the plate by an electromagnetic force, a counterweight provided at another end of the plate and facing the magnet holder, a dummy structure connected to the magnet holder through a connecting member and having a test specimen installed at one side thereof, a load cell unit provided between the dummy structure and the test specimen to measure impulse of the test specimen, and a controller configured to control the electromagnetic force to be created in the magnet holder and to receive the impulse measured by the load cell unit. When the electromagnetic force is cancelled, the connecting member disengages from the magnet holder, and the dummy structure and the test specimen fall onto the ground.

公开(公告)号：US20230412048A1

公开(公告)日：2023-12-21

申请号：US18330700

申请日：2023-06-07

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jung Jin LEE

IPC: H02K7/20 ,  H02K7/116 ,  H02P5/48

CPC classification number: H02K7/20 ,  H02K7/116 ,  H02P5/48

Abstract: A dual motor actuator according to an embodiment includes a main motor actuator outputting torque to a main output shaft by including a main motor and a main reduction gear, an auxiliary motor actuator outputting torque to an auxiliary output shaft by including an auxiliary motor and an auxiliary reduction gear, and a clutch connecting the main output shaft and the auxiliary output shaft to each other, wherein the clutch includes a fixed clutch connected to the main output shaft and a movable clutch coupled to or released from the fixed clutch and connected to the auxiliary output shaft, and the dual motor actuator further includes an output unit connected to the movable clutch and transmitting an output from the main motor actuator or the auxiliary motor actuator.

公开(公告)号：US20250145281A1

公开(公告)日：2025-05-08

申请号：US18924692

申请日：2024-10-23

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jung Jin LEE

IPC: B64C25/36 ,  B64C25/50 ,  B64C25/60 ,  B64C25/62

Abstract: The present disclosure relates to a strut and a landing gear including the strut, and more particularly, to an disclosure in which a strut is formed of a curved pipe formed of a flexible body to reduce a weight of a component, and at the same time, an impact load of the strut and the landing gear is alleviated through a design of the physical properties and shape of the strut.

公开(公告)号：US20240183729A1

公开(公告)日：2024-06-06

申请号：US18509982

申请日：2023-11-15

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jung Jin LEE

IPC: G01L3/10

CPC classification number: G01L3/10

Abstract: The provided device is a torque testing tool for electric actuators, employing a potentiometer, load cell, and spring system to measure torque. It surpasses conventional leaf springs with its wider operational rotation range. The setup includes a potentiometer fixed at the electric actuator's shaft end, a vertically positioned torque arm, a rod connected to the torque arm with a load cell, and a spring system attached to the rod and a second bracket, all vertically aligned with the actuator's shaft. A control unit processes force data from the load cell and rotation angle data from the potentiometer to accurately calculate the electric actuator's torque. This innovative design ensures precise torque measurement, offering enhanced efficiency and versatility for various applications relying on electric actuators.