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Unlike bigger aircraft, the small fixed-wing unmanned aerial vehicles face significant stability challenges in a turbulent environment. To improve the flight performance, a fixed-wing UAV with segmented aileron control surfaces has been designed and deployed. A total of four ailerons are attached to the main wing and grouped into inner and outer aileron pairs. The controllers are automatically tuned by utilizing the frequency response data obtained via the frequency sampling filter and the relay with embedded integrator experiments. The hardware validation experiments are performed in the normal and turbulent flight environments under three configurations: inner aileron pair only, outer aileron pair only and collective actuation of all the aileron pairs. The error-threshold-based control is introduced to handle collective actuation of aileron pairs. The experiments have manifested that the collective usage of all aileron segments improves the roll attitude stability by a margin of (For ....
where the economy is concerned, this summit could have a serious impact on jobs. here s some of what the president said tonight about the economy, about syria and politically from the romney campaign. markets around the world have been asking if europe is ready to do what is necessary to hold the eurozone together. european leaders here in cabos have made it clear that they understand the stakes and pledge to take the actions needed to address this crisis and restore confidence, stability and growth. let me just be a little more specific. first our friends in europe clearly grasp the seriousness of the situation and are moving forward with a heightened sense of urgency. i welcome the important steps that they have already taken to promote growth, financial stability and fiscal responsibility. there s no doubt that russia, which historically has had a relationship with syria as well as china, which is generally wary of commenting on what it considers to be the internal ....
basically, we got 80% agreement. we got 80% agreement. 47 million americans who don t have any health insurance. that youtube thing got more hits than the president s e-mail video blast. you might expect that. does he need to up his game that much? probably he doesn t need to autotune himself, i don t think. that video does show something that a lot of young people really like and the autotuning is something that people forward to each other and post on facebook and it s something that is easily spreadable and i think, most importantly, it s just a fun thing that really resonates with young people and i think if obama wants to get young people energized gwynne he needs to show more of that fun side. let s face it. the young supporters this time ....