Korea Aerospace Research Institute | Date: 2015-12-01
Provided is an apparatus for controlling an orbiting satellite by sensing a change in a yaw angle of the orbiting satellite and calculating a ground sample distance (GSD) based on the yaw angle. The apparatus may include a sensor configured to sense a yaw angle corresponding to yaw steering of the orbiting satellite, and a processor configured to calculate, based on the yaw angle, a GSD corresponding to a length of a pixel projected onto a planetary surface scanned by the orbiting satellite.
Korea Aerospace Research Institute | Date: 2016-10-13
A solar propelled aircraft which has a wing having solar cell modules mounted therein includes: first solar cell modules which are positioned in a wing or a tail wing of the aircraft and receive solar energy directly from the sun; second solar cell modules which are positioned in a main wing or a tail wing of the aircraft and supplied with directed energy from the earth; and rotating shafts which rotate the first solar cell modules and the second solar cell modules so that the first solar cell modules and the second solar cell modules correspond to each other in both directions. The first solar cell module at the upper surface obtains solar energy from the sun, and the second solar cell module at the lower surface obtains directed energy transferred from the earth.
Korea Aerospace Research Institute | Date: 2016-08-07
Disclosed is an automatic climbing and gliding method of a high altitude unmanned aerial vehicle (UAV). The disclosed method includes setting a cylindrical virtual flight region so that the high altitude UAV climbs and glides, setting a first target point on an end of a first flight radius which is vertically arranged to form the virtual flight region, setting second to Nth target points at arbitrary second to Nth flight radii sequentially arranged above or below the first flight radius, having the target points have a predetermined plane slope angle, and allowing the UAV to climb along a straight path line sequentially connecting each of the target points.
Korea Aerospace Research Institute | Date: 2017-03-22
The present invention introduces a sphere magnetic levitation system having magnetic aligning devices that magnetically align the position of a sphere levitated by electromagnets provided on the periphery of the sphere according to whether the sphere is levitated, and a method of operating the sphere magnetic levitation system. The sphere magnetic levitation system includes: a sphere; a plurality of electromagnets symmetrically positioned about the sphere and spaced apart from the sphere at equal distances; and a plurality of magnetic-aligning devices provided around the sphere, and coming into contact with the sphere or separated from the sphere by a predetermined distance according to the modes of the sphere magnetic levitation system. The system is operated in one mode from among: an idle mode, in which the magnetic-aligning devices are in direct contact with and support the sphere; and an operation mode, in which the magnetic-aligning devices are separated from the sphere and the sphere is levitated and rotated.
Korea Aerospace Research Institute | Date: 2017-02-01
An apparatus for containing and charging an unmanned VTOL aircraft 300, comprising a post 200 placed on a ground and at least one lateral fastening hole 210 formed in a side of the post, and configured such that a pole 340 of the unmanned VTOL aircraft is inserted and fastened into the lateral fastening hole, wherein an entrance of the lateral fastening hole is formed in a cone shape, and thus the pole of the unmanned VTOL aircraft is easily inserted into the lateral fastening hole during fastening of the unmanned VTOL aircraft. The lateral fastening hole is further configured such that target- and cross-shaped LED/IR lights are lit in order to guide the unmanned VTOL aircraft through automatic insertion via vision of the unmanned VTOL aircraft.
Korea Aerospace Research Institute | Date: 2016-11-03
Provided is an unmanned aerial vehicle that broadcasts a route and future location information of the unmanned aerial vehicle within preset coverage based on sensing data and current location information of the unmanned aerial vehicle. The unmanned aerial vehicle includes a calculator configured to calculate a predicted route and second location information of the unmanned aerial vehicle corresponding to a preset period of time based on first location information and sensing data; and a transmitter configured to periodically broadcast a first notification signal that includes the first location information, the predicted route, and the second location information.
Korea Aerospace Research Institute | Date: 2016-03-03
An apparatus for coding a plurality of packets in a multi-antenna system, the apparatus including a processor configured to determine space-time codes of the plurality of packets sequentially from a subsequent packet to maximize an average throughput of the plurality of packets, and a transmitter configured to transmit the plurality of packets to an antenna, is provided.
Korea Aerospace Research Institute | Date: 2016-04-14
A landing receiving apparatus for aircraft landing, and a control method thereof are provided, in which the landing receiving apparatus includes a flight management system (FMS) which is inputted with, by a user, destination airport, destination runway, and a receiver mode, a data storage portion which stores approach path data for landing of the aircraft; a receiver portion which calculates aircraft position information by using Global Navigation Satellite System (GLASS) signals and Satellite-Based Augmentation System (SBAS) signals transmitted from an antenna portion, when a receiver mode inputted by a user is a GNSS/SBAS combination mode, and a landing guidance information generating portion which generates landing guidance information by using approach path data corresponding to a destination airport and a destination runway inputted by the user, and the aircraft position information, and transmits the generated landing guidance information to the FMS.
Korea Aerospace Research Institute | Date: 2016-08-18
A testing apparatus for Scramjet engine is capable of preventing breakage of liners in a high-pressure and high-temperature environment in which pressure is 10 Mpa or above and temperature is 1800 K or above. To this end, the testing apparatus for Scramjet engine includes a pipe that endures high-pressure environment, a first liner in a tubular shape, being provided within the pipe, and a second liner in a tubular shape, being provided within the pipe, in which an outer circumference of the second liner is overlapped with an inner circumference of a rear end of the first liner.
Korea Aerospace Research Institute | Date: 2016-11-17
Provided are a method and a system for an inverse chirp-z transformation, and more particularly, a method and a system for an inverse chirp-z transformation having improved availability as compared to conventional Inverse Discrete Fourier Transform (IDFT) or Inverse Fast Fourier Transform (IFFT) because a start time of an output signal and an interval between samples are freely adjustable in obtaining a signal on a time domain by performing an inverse transformation for any spectrum signal on a frequency domain.