The Recent Advance of Unmanned Quadrocopter

Abstract

In recent years, with the rapid development of micro electro mechanical system and DSP in high operation speed and low power consumption and high polymer lithium battery, all this creates the conditions for the development of micro unmanned aerial vehicles. UAVs possess the advantages of simple structure, flexible flight, the capability of vertical takeoff and landing, great passing ability, better carrying capacity, and so on. They can be used widely in various fields such as disaster emergency and rescue, urban mapping, outdoors exploration. The unmanned quadrocopter aroused interest among those scholars for itspotential application prospect and value in use. This paper briefly summarizes the history of application and development of the unmanned quadrocopter, and reviews the new algorithm and progress in the study of the unmanned quadrocopter and application of the unmanned quadrocopter at home and abroad.

The Effects of TiAlN and TiN Coating during End Milling of INCONEL 718

“…Advances in Mechanical and Manufacturing Engineering Tearing off coating and flank wear happened rapidly in TiN coated carbide makes it disadvantages against TiAlN coated carbide tool. Li et al investigated about evaluating the inserts machinability at high speed cutting of Inconel 718 mentioned that the tool wear mechanisms of coated carbide inserts were adhesive, coating peeling and fracturing [13]. While wear happen mainly for TiAlN coated carbide is flank wear.…”