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Open AccessArticle
10 Pages, 3,367 KB Download PDF

Effects of Different Activation Functions for Unsupervised Convolutional LSTM Spatiotemporal Learning

Advances in Science, Technology and Engineering Systems Journal, Volume 4, Issue 2, Page # 260–269, 2019; DOI: 10.25046/aj040234
Abstract:

Convolutional LSTMs are widely used for spatiotemporal prediction. We study the effect of using different activation functions for two types of units within convolutional LSTM modules, namely gate units and non-gate units. The research provides guidance for choosing the best activation function to use in convolutional LSTMs for video prediction. Moreover, this paper studies the…

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(This article belongs to the SP7 (Special Issue on Advancement in Engineering and Computer Science 2019) & Section Interdisciplinary Applications of Computer Science (CSI))
Open AccessArticle
10 Pages, 989 KB Download PDF

Multi-Objective Path Optimization of a Satellite for Multiple Active Space Debris Removal Based on a Method for the Travelling Serviceman Problem

Advances in Science, Technology and Engineering Systems Journal, Volume 3, Issue 6, Page # 479–488, 2018; DOI: 10.25046/aj030656
Abstract:

Space debris removal is currently a critical issue for space development. It has been reported that five pieces of debris should be removed each year to avoid further increase in the amount of debris in orbit. One approach for the removal of multiple pieces of debris is to launch multiple satellites that can each remove…

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(This article belongs to the SP5 (Special Issue on Multidisciplinary Sciences and Engineering 2018) & Section Aerospace Engineering (EAR))
Open AccessArticle
11 Pages, 1,191 KB Download PDF

Using Fuzzy PD Controllers for Soft Motions in a Car-like Robot

Advances in Science, Technology and Engineering Systems Journal, Volume 3, Issue 6, Page # 380–390, 2018; DOI: 10.25046/aj030646
Abstract:

This paper deals with the control problem for nonholonomic wheeled mobile robots moving on the plane, and in particular, the use of a Fuzzy controller technique for achieving a given motion task which consists of following a rectilinear trajectory until an obstacle occurs on the path. After a background part, in which the fundamental knowledge…

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(This article belongs to the SP6 (Special Issue on Recent Advances in Engineering Systems 2018-19) & Section Automation & Control Systems (ACS))
Open AccessArticle
9 Pages, 1,189 KB Download PDF

Velocity obstacles for car-like mobile robots: Determination of colliding velocity and curvature pairs

Advances in Science, Technology and Engineering Systems Journal, Volume 3, Issue 1, Page # 225–233, 2018; DOI: 10.25046/aj030127
Abstract:

This paper addresses the motion planning problem of Reeds-Shepp-type car-like mobile robots moving among static and dynamic obstacles. If the positions and the velocity vectors of the obstacles are known or well estimated, the Velocity Obstacles (VO) method and its non-linear version (NLVO) can be used to plan a collision-free trajectory for a robot in…

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(This article belongs to the SP4 (Special issue on Advancement in Engineering Technology 2017-18) & Section Robotics (ROB))
Open AccessArticle
8 Pages, 743 KB Download PDF

Fault Tolerant Control Based on PID-type Fuzzy Logic Controller for Switched Discrete-time Systems: An Electronic Throttle Valve Application

Advances in Science, Technology and Engineering Systems Journal, Volume 2, Issue 6, Page # 186–193, 2017; DOI: 10.25046/aj020623
Abstract:

This paper deals with the problem of Fault Tolerant Control (FTC) using PID-type Fuzzy Logic Controller (FLC) for an Electronic Throttle Valve (ETV) described by a switched discrete-time system with input disturbances and actuator faults. In order to detect the faults, Unknown Input Observers (UIOs) are designed and formulated in terms of Lyapunov theory and…

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(This article belongs to the SP4 (Special issue on Advancement in Engineering Technology 2017-18) & Section Automation & Control Systems (ACS))
Open AccessArticle
8 Pages, 731 KB Download PDF

Group of UAVs Moving on Smooth Control Law with Fixed Obstacles

Advances in Science, Technology and Engineering Systems Journal, Volume 2, Issue 3, Page # 1034–1041, 2017; DOI: 10.25046/aj0203131
Abstract:

In this paper considered the movement of multi-agent system that consists of several UAVs that carry out monitoring ground surface. The multi-agent system includes a lead agent and several agents-members of the group. The motion of this system occurs along a trajectory, which is determined by the initial conditions, its mathematical model and obstacles on…

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(This article belongs to the SP3 (Special issue on Recent Advances in Engineering Systems 2017) & Section Aerospace Engineering (EAR))
Open AccessArticle
7 Pages, 1,543 KB Download PDF

Kinect-Based Moving Human Tracking System with Obstacle Avoidance

Advances in Science, Technology and Engineering Systems Journal, Volume 2, Issue 3, Page # 191–197, 2017; DOI: 10.25046/aj020325
Abstract:

This paper is an extension of work originally presented and published in IEEE International Multidisciplinary Conference on Engineering Technology (IMCET). This work presents a design and implementation of a moving human tracking system with obstacle avoidance. The system scans the environment by using Kinect, a 3D sensor, and tracks the center of mass of a…

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(This article belongs to the SP3 (Special issue on Recent Advances in Engineering Systems 2017) & Section Robotics (ROB))
Open AccessArticle
6 Pages, 681 KB Download PDF

Aviation Navigation with Use of Polarimetric Technologies

Advances in Science, Technology and Engineering Systems Journal, Volume 2, Issue 3, Page # 67–72, 2017; DOI: 10.25046/aj020310
Abstract:

The article deals with the problem of increasing the accuracy of determination of aircraft’s navigation flight parameters. Increasing the accuracy and sensitivity of navigation parameters determination will improve the efficiency of air conveyance by optimizing the flight trajectories and reducing the flight time and simultaneously will ensure the sufficient level of air conveyance safety. The…

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(This article belongs to the SP3 (Special issue on Recent Advances in Engineering Systems 2017) & Section Aerospace Engineering (EAR))

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