A NOVEL NN OUTPUT FEEDBACK CONTROL LAW FOR QUAD ROTOR UAVIJARIDEA Journal
This document summarizes a research paper that proposes a novel neural network output feedback control law for quad rotor unmanned aerial vehicles (UAVs). The control law uses the inherent underactuation of quad rotors to generate virtual control inputs that enable the UAV to track a desired trajectory despite unknown disturbances. A neural network observer is used to estimate the infinite states of the system, and a novel neural network virtual control structure allows desired translational speeds to be controlled via pitch and roll. Lyapunov stability analysis shows that estimation errors, tracking errors, and neural network weights are bounded. The document then provides background on quad rotors, unmanned aerial vehicles, nonlinear control systems, and genetic algorithms.
Snowfall is worth experiencing at least once in life. It is quite magical and mesmerizing when it starts snowing. Know about places to see snowfall in India.
Secured channel condition estimation algorithm to remove attacks in mobile ...IJARIDEA Journal
This document presents a secured channel condition estimation algorithm to remove attacks in mobile ad hoc networks (MANETs). The algorithm examines the state of multiple channels and identifies the best channel for routing. It is implemented using Network Simulator 2 (NS2) and evaluated. The results show that the algorithm can accurately estimate channel conditions, identify attacker nodes disrupting routing, and spread alarm messages to avoid routing through attackers. This improves the security and performance of routing in MANETs.
This document summarizes an experiment investigating high-temperature superconductivity in Yttrium Barium Copper Oxide samples. The experiment aimed to demonstrate the Meissner effect and zero resistance in the samples using liquid nitrogen. The document provides theoretical background on superconductivity, including the Meissner effect, Ginzburg-Landau theory, BCS theory, and the structure of Yttrium Barium Copper Oxide. It describes the experimental methods, results from Meissner effect tests, magnetic field experiments, X-ray diffraction analysis, and resistance measurements. The results are then discussed in relation to the theories of superconductivity.