Korea Aerospace Research Institute

Eunsup Sim

Moonbeom Heo

Giwook Nam

Wooyong Kang

Eunsung Lee

JuHun Rhee

Kyung-Hwan Lee

Bum-Seok Hyun

A cryocooler, includes a cylinder filled with gas. A piston rectilinearly reciprocates inside of the cylinder and compresses or expands the gas. A connecting rod has a first side coupled to the piston and moves with the piston, and a second side having a first thread along an outer circumference thereof. A linear motor rectilinearly reciprocates a motor shaft toward the connecting rod in accordance with a control signal. A sleeve has two open sides, so that an end portion of the motor shaft can be supported by and inserted in one open side, and the second side of the connecting rod can be inserted in the other open side, and an inner circumference of the sleeve is formed with a second thread that engages with the first thread of the connecting rod and rotates to adjust a distance between the motor shaft and the connecting rod.

Cryocooler with variable compression depending on variations in load

Provided is a method of determining a drive lane using a steering wheel model. The method includes a step Sof preparing a precise digital map having an accuracy capable of differentiating a road lane; a step Sof estimating a vehicle location on a road using GPS information; a step Sof checking whether the vehicle location information is normal using a difference between variation in the azimuth angle of the vehicle obtained by using the GPS information and variation in the azimuth angle of the vehicle obtained by using the steering wheel model; and a step Sof determining and outputting a drive lane occupied by a running vehicle.

Method of determining drive lane using steering wheel model

Growing community of inventors

Chungcheongnam-do, South Korea

Eunsup Sim