Ajujaht 2012-s osalejale tehti projekti ettepanek Kirde-Hiinas

SIPGRADE, üks aasta 2012 Ajujahil esitletud projektidest sai toetust edasisele arendamisele Anshan Laser Valleys (Liaoning, Kirde-Hiina), koos teiste kavandatavate projektidega metroloogia ja mõõtmise süsteemide vallas, mis põhinevad Zeeman kahekordse sageduse interferomeetrial.

Teine variant (tavapärane, kahekordse sagedusega laser) leiab kasutust rasketööstuse tööpinkide dünaamilisel kalibreerimisel, kui esimese kahe projekti hulka kuuluvad laseri ja kaamerate tarvis fotoelektrooniliste elementide arenemine, mida kasutatakse väikeste mehitamata õhusõidukitel.

Rajamisel on uus 700 m² ehitis, milles on spetsiaalne labor kõigi vajalike seadmetega. Temperatuuri testala saab olema Liaoning Institute of Technology poolt, samuti hulk teadlasi välja töötamaks FPGA (DSP) signaali konditsioneerimise ja töötlemise elektroonikat.

Ajujaht 2012 proposal developing in North East China

One of the projects presented in Ajujaht 2012 in Tallinn, received support for further development in Anshan Laser Valley (Liaoning, north East China), together with other proposed projects for metrology and measurement systems based on Zeeman double frequency interferometry.

Another variant (traditional, double frequency laser source) will be used for dynamic calibration of heavy duty machine tools, while other two projects include design of photoelectronic elements for laser target designators and cameras for use on small UAVs. 

A new 700 sqm facility, including laboratory and equipment and a temperature-controlled test area has been made available aside Liaoning Institute of Technology, which will involve selected researchers for the design of FPGA (DSP) signal conditioning electronics. 

Anti GPS spoofing device presented to Galileo Master EU Competition

We are planning the design of an anti-jamming systems for UAV and presented it to the Galileo Master 2012 competition. The idea comes analyzing the recent case of the UAV landed by jamming its navigation system. By putting noise [jamming] on the communications with the satellite (the UAV was far from its closest control station) , they probably forced the UAV into autopilot RTL mode (Return To Launch).At that time the UAV relies on GPS signals to get home. By spoofing the GPS, jammers were able to get the UAV to 'land on its own where they wanted it to, without having to crack the remote-control signals and/or satellite communications data link.'"
The idea is actually nothing special, it uses redundancy, i.e. uses more independent GPS sensors controlling each other on the same platform and then let just one of them being 'fooled' by the jamming, while the other maintain correct information and drive the UAV back home.
A compass and some accelerometers (or even a view of the sun and an RTC) are a lousy substitute for the accuracy of GPS; but they do provide a sanity check that could keep you going in approximately the right direction, at least enough to hard-land somewhere nominally friendly, if GPS cannot be trusted.

It's certain that the UAV had an inertial navigation system - the problem is, how do you know when to use it? The way they usually work is that the navigation system computes two solutions: a hybrid GPS/INS solution to use most of the time, and a backup inertial-only solution. The inertial-only solution doesn't get used by the flight computers unless GPS is out entirely or there's some other very obvious problem. If you spoofed a GPS signal with real coordinates and slowly guided it away, how could the nav system see there's something wrong?Inertial navigation systems need reference points to prevent huge drifts over time. This is especially a problem if the aircraft flies relatively straight at the same speed for a long time -- accelerometers won't be able to detect slight changes in course. GPS is used to provide the reference points to reduce the drift. If the GPS system is wrong, then the inertial navigation system is also going to be fooled.

RoadmapWe first will test a solution with legacy Ardupilot with Air Shield (pressure sensor), no thermopiles, and an ArduIMU V2 instead, connected to a Mediatek 10Hz GPS. This with be 'sacrificed' and will talk to the jamming system (jammer), trying to make sure he thinks he is in control and following its instructions.Another two GPS receivers, i.e. a uBlock (binary) and and EM-406 Sirf with different protocols would stay behind, protected from the jammer by a firewall, and fly the UAV back to a safe home position. The system is based on open-source data and limited, through Xbee telemetry, to 1.2 km. Next step will be performed on a remote system up to 40 km and finally on a satellite datalink.

www.chinauavtech.com

Feanor OÜ enters officially UAV business

Feanor OÜ enters officially UAV business in 2012 through a cooperation with Shenyang Aerospace in Shenyang, Liaoning province, Nort East China. Feanor will be responsible for design and integration of sensors into existing autopilot hardware and further development of APM 1 and APM 2 platforms based on Atmega2560 (GPS, altimeter, magnetometer and dataflash included), using Invensense 6DoF MPU-6000, autonomous take-off and landing. 

When using the internal sensor fusion processor of the MPU-6000, more than half of the Atmega2560 processing capacity is free for new advanced features.