VERTICAL REPLENISHMENT BY UNMANNED AERIAL VEHICLES

... the vertical replenishment vii List of Figures 1.1 Vertical replenishment by U.S Navy (Use of released U.S Navy imagery does not constitute product or organizational endorsement of any kind by ... 1.2 NUS2 TLion developed by NUS UAV Group 2.1 Aerial robots developed by NUS Unmanned Aerial Vehicle Research Group 2.2 Hardware configuration ... 1.1: Vertical replenishm...

Ngày tải lên: 30/09/2015, 09:23

... acceleration of gravity h NED frame altitude Jxx rolling moment of inertia Jyy pitching moment of inertia Jzz yawing moment of inertia KI integral gains of the embedded controller KP proportional gains of ... points [8], uniform subsampling of all the points [77], random sampling of the points [52], or using points with high intensities plus illumination information [83] Using...

Ngày tải lên: 09/09/2015, 08:16

... density Lithium Polymer batteries and more efficient and compact actuators, thus resulting in the rapid development of unmanned aerial vehicles The vertical take-off and landing (VTOL) crafts due their ... creation of intelligent unmanned aerial vehicles, such as a sophisticated unmanned helicopter equipped with a vision enhanced navigation system [6], [7], [8] Uti...

Ngày tải lên: 09/09/2015, 08:18

... advanced indoor navigation systems for miniature unmanned aerial vehicles (UAVs) has aroused worldwide interests because of its great potential in military and civil applications [58, 67] Indoor navigation ... This thesis aims to develop an advanced indoor navigation system for unmanned aerial vehicles Two different UAV platforms have been developed as test beds...

Ngày tải lên: 09/09/2015, 11:15

... work done for collision avoidance algorithms and sensors that are implemented on flight platforms on unmanned aerial vehicles There have been a substantial amount of research on collision avoidance ... related work will be discussed Before moving to collision avoidance in aerial vehicles, a study of the collision avoidance algorithms that have been developed for g...

Ngày tải lên: 03/10/2015, 20:58

... environments Some examples of SLAM applied to aerial vehicles can be found in [5–7] There also exist other kinds of terrain navigation methods which are not based on aerial images but on terrain elevation ... part by the National Aeronautics Research Program NFFP04-S4202, the Swedish Foundation for Strategic Research (SSF) Strategic Research Center MOVIII, the Swedish Research C...

Ngày tải lên: 21/06/2014, 20:20

... (1974)  As the wave number ka increases The wave forces on the cylinders oscillate around the wave forces on an isolated cylinder  As the cylinder spacing increases, the wave force on the cylinders ... Remarks  The wave forces acting on two cylinders and three cylinders are computed by using boundary element method The numerical r...

Ngày tải lên: 26/07/2014, 07:20

... oleo-pneumatic landing gears This technical paper has focused for conceptual layout design of oleo-pneumatic type shock absorber for both the main landing gears and the nose landing gear The oleo-pneumatic ... section we will discuss a case study of landing gear layout for following given dimensions Table -1: Landing gear layout case study parameters 3.3 Nose la...

Ngày tải lên: 08/08/2014, 13:20

... 10 Aerial Vehicles 10 Packet Loss Ratio (%) 0 50 10 0 15 0 200 250 Sampling Rate (Hz) Figure Packet loss ratio as a function of the sampling rate 20 40 60 80 10 0 12 0 Probability (X>x) 0 ,1 0, 01 ... January 2009 Printed in Croatia Aerial Vehicles, Edited by Thanh Mung Lam p cm ISBN 978-953-7 619 - 41- 1 Aerial Vehicles I Thanh Mung Lam V Preface Unmanned and micro aerial...

Ngày tải lên: 10/08/2014, 22:24

... ⎢0 ⎢0 ⎢ ⎢0 ⎢0 ⎢ ⎣0 t0 t0 t0 t t 0 0 0 0 t1 t1 t1 0 t2 t2 t2 2t 3t 4t 0 0 2t 3t 4t 0 0 0 0 2t 3t 0 0 2t 2 3t 2 6t 12t 0 2 −6t 6t 0 2 −6t 12t The polynomial coefficients are stacked into the ... 16 64 25 6 ⎥ ⎢ ⎥ 0 0 64 5 12 4096⎥ ⎢a 0x ⎢e0x 0 0 0 0 ⎥ ⎥ Yx,y,z = ⎢d 48 25 6 0 0 ⎥ ⎢ 1x ⎢c1x ⎥ 0 0 48 25 6 ⎢ ⎥ 0 0 16 1 92 2048⎥ ⎢b1x ⎢a 24 1 92 0 2 24 −1 92 ⎢ 1x ⎥ ⎢ 0 0 2 0 ⎦ ⎣e1x , 0...

Ngày tải lên: 10/08/2014, 22:24

... pitch, yaw angles in Figure 13 They give you an idea about how simulations follow real tendencies even for small attitude variations 39 0 38 0 -5 -10 37 0 -1 -30 -2 -35 -3 -15 35 0 Y a w (d e g re e s ... e s ) -20 P it c h (d e g re e s ) 36 0 34 0 33 0 32 0 31 0 10 12 Time (sec) 14 16 18 20 30 0 10 12 Time (sec) 14 16 18 20 290 10 12 Time (sec) 14 16 18 20 Figure 13 Roll, Pitch...

Ngày tải lên: 10/08/2014, 22:24

... 172.0765 )α − 4. 411)x + 75.0613ΔVa & x = −0.77101x − 228.88 94 Δn y (16) & δ t = 0.0011588x + 1.0565ΔVa − 0.6989Va + 0. 246 51 δ e = 41 .55 94 + (− 140 .8115α )0.5 + 0.89016 x − 26.1 045 Δn y + 50.1835ω ... follows: ( ) & x = −39.2775x − 44 .57ω x + (4. 6 845 x )0.5 + 69. 347 8 n z δ a = −26.7812 Δγ + 8.1188ω x +0.57032 δ r = −1.6916 x − 1.33n z + 4. 17 64 y + 21.2955 β − 0.651 84 Samp...

Ngày tải lên: 10/08/2014, 22:24

... Identification 50 Beta (deg) P (deg/sec) R (deg/sec) -50 69 4 69 5 69 6 69 7 69 8 69 9 700 Left Aileron (deg) Left Rudder (deg) -5 69 4 69 5 69 6 69 7 Time(sec) 69 8 69 9 700 Figure Flight Data for Linear Model Identification ... ⎡ 0.272 ⎢ ⎥ ⎢ ⎥ ⎢ p ⎥ ⎢-101.845 33.474 ⎥ ⎡δ A ⎤ p ⎥ ⎢ -67 .334 -7.949 5 .64 0 ⎢ = ⎥⎢ ⎥ +⎢ ⎥ ⎢ r ⎥ ⎢ 20.533 -0 .65 5 -1.9 96 ⎥ ⎢ r ⎥ ⎢ -6. 261 -24. 363 ⎥...

Ngày tải lên: 10/08/2014, 22:24

... 0 .73 14 0 .71 49 0. 977 0.543 0.161 33 45 20 0 .78 23 0 .78 26 1.000 0.580 0. 172 25 45 30 0.8685 0.82 17 0.946 0.644 0.1 67 14 45 45 1.1038 0.8801 0 .79 7 0.832 0.143 60 0.8 477 0 .70 80 0.835 0. 676 0.1 27 64 ... Cd 0 .73 14 0 .74 97 (+2.5%) 0 .77 33 (+5 .7% ) Cy 0 .71 49 0 .78 25 (+9.5%) 0.8308 (+16.2%) C eff 0. 977 1.044 (+6.9%) 1. 074 (+9.9%) Cp 0.543 0.604 (+11.2%) 0.583 ( +7. 4%)...

Ngày tải lên: 10/08/2014, 22:24

... posi 0 .98 4 0 .98 4 0 .98 5 0 .98 5 0 .98 5 0 .98 4 0 .98 5 0 .98 5 0 .98 6 0 .98 6 0 .98 5 0 .98 5 0 .98 6 0 .98 6 0 .98 6 d \ posi 0. 896 0. 897 0. 897 0. 896 0. 896 0 .91 4 0 .91 6 0 .91 5 0 .91 6 0 .91 6 0 .91 9 0 .91 9 0 .92 1 0 .92 1 0 .92 1 ... 0 .97 8 0 .97 8 0 .97 8 0 .98 0 0 .98 0 0 .98 2 0 .98 2 0 .98 3 0 .98 4 0 .98 4 0 .91 3 0 .91 3 0 .91 3 0 .91 6 0 .91 8 0 .91 3 0 .91 3 0 .91...

Ngày tải lên: 10/08/2014, 22:24