Results 21 to 30 of about 129,505 (245)

Acquisition of Time and Doppler Shift in WFRFT Encrypted Chaotic Direct Sequence Spread Spectrum System

IEEE Access, 2022
Weighted fractional Fourier transform encrypted chaotic direct sequence spread spectrum (WFRFT-CD3S) signal is aperiodic and complex Gaussian distributed.
Jiangyan He, Guogang Yuan, Zili Chen, Xijun Gao   +3 more
doaj   +1 more source

Neural Network L1 Adaptive Control of MIMO Systems with Nonlinear Uncertainty

The Scientific World Journal, 2014
An indirect adaptive controller is developed for a class of multiple-input multiple-output (MIMO) nonlinear systems with unknown uncertainties.
Hong-tao Zhen, Xiao-hui Qi, Jie Li, Qing-min Tian   +3 more
doaj   +1 more source

Real-time people and vehicle detection from UAV imagery [PDF]

, 2011
A generic and robust approach for the real-time detection of people and vehicles from an Unmanned Aerial Vehicle(UAV) is an important goal within the framework of fully autonomous UAV deployment for aerial reconnaissance andsurveillance.
Anna Gaszczak, Gaszczak, A., Breckon, Toby P., Han, Jiwan, Han, J., Breckon, T.P., Jiwan Han, Gaszczak, Anna, Toby P. Breckon   +8 more
core   +1 more source

Accuracy Characteristics and Experimental Research of UAV Cable Engine Control System

Hangkong gongcheng jinzhan, 2020
Accuracy is one of the important performance indexes of the cable control system, which directly affects the steady and transient performance of the engine.
GAN Fajin, WANG Yang, LEI Qianqian, XU Zhixiong, LAN Wenbo   +4 more
doaj   +1 more source

Modeling and simulation enabled UAV electrical power system design [PDF]

, 2011
With the diversity of mission capability and the associated requirement for more advanced technologies, designing modern unmanned aerial vehicle (UAV) systems is an especially challenging task.
Rakhra, Puran, Burt, Graeme, Norman, Patrick, Galloway, Stuart, Fletcher, Steven, Lowe, V.   +5 more
core   +4 more sources

UAV Motion Strategies in Uncertain Dynamic Environments: A Path Planning Method Based on Q-Learning Strategy

Applied Sciences, 2018
A solution framework for UAV motion strategies in uncertain dynamic environments is constructed in this paper. Considering that the motion states of UAV might be influenced by some dynamic uncertainties, such as control strategies, flight environments ...
Jun-hui Cui, Rui-xuan Wei, Zong-cheng Liu, Kai Zhou   +3 more
doaj   +1 more source

Guidance Law for a Surveillance UAV Swarm Tracking a High Capability Malicious UAV [PDF]

, 2021
Significant research is currently focused on the issue of malicious UAVs or drones disrupting critical services (e.g. civilian airport operations). One mitigation is to track or pursue a malicious UAV back to its point of origin (and possibly its owner ...
Nawin Raj, Brown, Jason, Raj, Nawin, Jason Brown, https://orcid.org/   +4 more
core   +1 more source

Aerodynamic optimization design of blended winglets for HALE UAVs

Kongqi donglixue xuebao
To address the engineering requirements for improving the aerodynamic efficiency of medium to high altitude long-endurance UAVs, this paper takes a high-aspect-ratio UAV as the research object and conducts aerodynamic optimization design of blended ...
Jiaxiang ZHAO, Xiaoxiang BAO, Zonghui WANG, Yang LUO   +3 more
doaj   +1 more source

Modeling and I-NSGA-III-VLC Solution of Aircraft Equipment Rotation and Echelon Usage under Uncertainty

Applied Sciences, 2022
Optimizing the aircraft equipment usage scheme of different units according to their task intensity has great significance in improving aircraft reliability and health management.
Qinglin Miao, Xiaofeng Zhang, Pisheng Qin, Xianguang Liu   +3 more
doaj   +1 more source

Modeling and HDA-CR Solution of Multi-Period Allocation Scheme of Hazardous Materials under Uncertainty

Applied Sciences, 2022
Developing a multi-period allocation scheme for life-limited hazardous materials is essential to ensure safe and sustainable hazardous material management.
Xianguang Liu, Xiaofeng Zhang, Wenfei Wang, Qinglin Miao   +3 more
doaj   +1 more source