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This paper is concerned with the robust discrete-time control for uncertain time-delay systems with nonlinearities and external noises. The parameter uncertainties enter into all the system matrices. The time-varying delay is unknown with given lower and upper bounds. The stochastic nonlinearities are described by satisfying a class of α Hölder condition. The problem addressed is the analysis and...
This study was undertaken to establish basic technologies and knowledge of aerial photography and its application to support safe rowing. For the water sport of rowing, managers and coaches use a motorboat to follow a rowing boat for coaching and safe rowing observation. Utilization of a motorboat gives rise to numerous problems in terms of pulled waves, narrow visual ranges, limited tracking of boats...
This study was undertaken to create an indoor environmental map using a monocular camera based on structure from motion (SfM). Numerous methods on simultaneous localization and mapping (SLAM) have been proposed for 3D map construction used for various types of mobile robots. We used MonoSLAM proposed by Davidson et al., which is a fundamental method using extended Kalman filters (EKFs) for feature...
We consider the problem of area coverage for robot teams operating under resource constraints, while modeling spatio-temporal environmental phenomena. The aim of the mobile robot team is to avoid exhaustive search and only visit the most important locations that can improve the prediction accuracy of a spatio-temporal model. We use a Gaussian Process (GP) to model spatially varying and temporally...
This paper describes mechanism the quadcopter with on-board sensors. This quadcopter consists of four rotors, four straight legs, and a disk-shaped body. The body is mainly composed of a lightweight, very rigid carbon fiber reinforced polymer (CFRP) and resin composite. A 9-axis inertial measurement unit (IMU) that contains accelerometer and gyroscope and magnetometer is installed in the body to measure...
Use of a Quadrotor is considered as one of the methods to inspect infrastructures such as a tunnel or a bridge. In such a case, it needs to control the position of the airframe. Note, however, that it is difficult to realize the position control using GPS in environments, such as in a tunnel or under a bridge, because there is a problem, such as the weakness of the GPS signal or the incomplete reaching...
A novel method for nonlinear stochastic time-varying systems identification based on multi-dimensional Taylor network with optimal structure is proposed. In this paper, the connection weight coefficients of multi-dimensional Taylor network are regarded as the time-varying parameters, which are trained by the variable forgetting factor recursive least squares algorithm, to reflect the input-output...
To analyze the driving behavior is important for design a comfortable automatic driving. So far, conventional PID models was widely used to steer the vehicle. It had been assumed that the driver looks at the constant point in conventional PID model. However, all drivers have experiences that the gazing distance changes according to the situations. The PID gain of the steering model are modified depending...
The purpose of this research is to offer constructive algorithm for estimator search in one network model under state and measurements attacks. The model is nonstationary descriptor system including difference equations for node state variables and algebraic equations for measurements. State variables and measurements are considered as random vectors. We use information cost criterion in order to...
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