Showing papers in "International Journal of Automation and Smart Technology in 2019"
TL;DR: There is a reduction in attitude error when using Sliding Mode Control in comparison with PID control in all simulation and actual hardware results, which shows that the quadrotor using Sl sliding Mode Control is less prone to attitude errors.
Abstract: This paper introduces Sliding Mode controller, a non-linear controller, for the implementation of an autonomous quadrotor platform, a non-linear system. The Sliding Mode controller was applied to a PixHawk Flight Controller using the Ardupilot firmware. The simulation testing using SITL shows the effectiveness of the controller before flight. The results imply the improvement when using Sliding Mode Control in comparison to PID controller. The results show that there is a reduction in attitude error when using Sliding Mode Control in comparison with PID control in all simulation and actual hardware results. The robustness of Sliding Mode Control was also tested by adding parameter uncertainties and disturbances to the system. In this study, the root-mean-square error obtained in the Sliding Mode Control is 1.546580%, 0.634243%, and 13.466256% for the roll, pitch, and yaw movements respectively, and the root-mean-square error obtained in the PID control is 2.588324%, 4.553838%, and 18.860183% for the roll, pitch, and yaw movements respectively. This shows that the quadrotor using Sliding Mode Control is less prone to attitude errors.
6 citations
TL;DR: Implementation and measurement of the novel discovery protocol demonstrates the viability and robustness of discovery without a permanent central controller on low cost ESP8266 family devices.
Abstract: It is proposed that Home Automation systems would be vastly improved by the novel approach of eliminating the permanent central controller as it is the source of significant problems. This leaves the responsibilities of the permanent central controller to be assumed by the remaining devices in the system, including IoT devices and interface devices such as smartphones and computers. While the capacity for joining devices to a network without the permanent central controller has been considered, device discovery has not. This paper examines existing protocols but finds that while many have worthwhile aspects none are suitable for the task. A novel discovery protocol is proposed, using smartphones or computers as intermittent control devices. This new protocol is developed with the aid of a new Robust Network Development Methodology which is able to anticipate problematic use cases prior to implementation. This methodology was very successfully in identifying and eliminating significant problems with the new protocol. Implementation and measurement of the novel discovery protocol demonstrates the viability and robustness of discovery without a permanent central controller on low cost ESP8266 family devices.
5 citations
SIDI1
TL;DR: This paper linearized the model of the wind turbine using Takagi-Sugeno (TS) approach based on the Lyapunov stability theory and LMI condition, and the PMI observer has been considered for TS fuzzy model to estimate both actuator and sensor faults with introducing a centered noise.
Abstract: This paper concerns the problem of Fault Detection and Isolation (FDI) of the wind turbines based a Proportional Multi-Integral Observer (PMIO). The main contribution of this paper is consisting of two part, in the fist part we have linearized the model of the wind turbine using Takagi-Sugeno (TS) approach based on the Lyapunov stability theory and LMI condition. Furthermore in second part the PMI observer has been considered for TS fuzzy model to estimate both actuator and sensor faults with introducing a centered noise. Although the k th derivatives of the actuators and sensor faults are not equal to zero and are bounded norm. However based on Lyapunov stability theory and L 2 performance analysis, the design conditions are established in LMIs formulations. The simulation shows that our proposal outperforms some existing approaches in the literature.
3 citations
TL;DR: In order to develop a manual and a powered self-transfer device, a methodical search of the entire solution space has been made by constructing a concept classification tree to decide on the choice of transfer posture, sequence of transfer motion, actuators, mechanisms and power source.
Abstract: Movement disability not only affects mobility but also affects other daily activities of a person with disability which includes accessing toilet, moving to a chair, etc. A wide variety of mobility assistive devices are commercially available but, the devices that enable self-transfer of a wheelchair user from one surface to another, specifically addressing transfer to a toilet commode, is the need of the hour. In order to develop a manual and a powered self-transfer device, a methodical search of the entire solution space has been made by constructing a concept classification tree to decide on the choice of transfer posture, sequence of transfer motion, actuators, mechanisms and power source. Prior to this decision making, the procedure adopted for transferring a disabled person by a caregiver and the general techniques followed by the disabled people to transfer themselves in toilets are investigated. Later, after the conceptual design which is common to both manual and powered version is finalized, the design criteria and target specifications are put forward. Then, the self-transfer devices are developed that satisfy these design criteria and target specifications. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License .
3 citations
TL;DR: An Internet of thing (IoT) system, which offers a complete energy consumption, monitoring and control and follows a strategy to reduce the load according to the available power and the device priority.
Abstract: This article offers an Internet of thing (IoT) based energy management system, that provide an automation concept and completely control the consumed energy by observing the delivered power from a limited and/or unreliable power sources. An example for such sources are photovoltaic and wind renewable energy where the supplied power depends on the weather conditions which make it fluctuated and unreliable. The proposed system offers a complete solution to reduce the consumed power based on the available power with less affecting on the quality of life. This article presents a cloud computing master unit that communicates with all the building devices via WIFI network nodes. These nodes are responsible for calculating the consumed energy by each connected device and deliver this information to the cloud. The system enables the user to schedule the devices’ levels of priority in a list, priority list. The master controller unit calculates the available power based on instantaneous supplied power from the source, stored energy, weather prediction, and priority list, then make a decision to keep all the devices powered on or shut down some of them for a while according to the list.This article presents an Internet of thing (IoT) system, which offers a complete energy consumption, monitoring and control. There is a master controller which is a website built with Ajax software to communicate with all the building devices (via a wireless router) which connected to Wi-Fi nodes (ESP8266 nodes) to calculate the consumed energy from each device and compare it with the fluctuated produced energy. The system is designed to keep the consumed energy, lower than the produced energy. This can be achieved by making the user take the decision and divides the building devices into three different priorities (High, Medium and Low). The presented system follows a strategy to reduce the load according to the available power and the device priority. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License .
3 citations
TL;DR: An automated Demand Dispatch strategy is proposed as a solution to the issues related to high penetration of wind turbine generators (WTG) on micro grid that basically balances the WTG power injection with real time controlled dispatchable loads.
Abstract: The variability of wind power generation adversely affects the grid conditions and the utilities find it challenging to accommodate variations in the injected wind power. To resolve this issue utilities impose curtailment of wind power generation. Demand side management (DSM) strategies have gained popularity among utilities in recent years. An advanced Demand Response (DR) scheme known as Demand Dispatch (DD) enable utilities to reshape demand curve to closely follow generation. An automated DD strategy is proposed as a solution to the issues related to high penetration of wind turbine generators (WTG) on micro grid. It basically balances the WTG power injection with real time controlled dispatchable loads. DD adopts smart communication for real time data collection as well as for dispatchable load management. A field implementation of DD in maintaining voltage stability in a DC microgrid with micro-WTG (m-WTG) is studied. The experiment results presented validate the scheme.
3 citations
TL;DR: An aspect of fast fault diagnosis appliance for perceiving double faults and recognizing the fault locations within the biochip is introduced and the suggested result outpoured that the propound technique is competent, efficacious as well as delineate signifying improvement over the surviving method.
Abstract: Progress of digital microfluidic biochip (DMFB) confronts for the defective and specious electrodes. Not only these hinder the routing of droplets but also the completion time of assay is influenced by those defective electrodes. As Microfluidic-based biochips are broadly used in the revolution of medical diagnosis, gigantic parallel DNA analysis, automatic drug discovery and real-time biomolecular recognition including numerous safety-critical applications, this biochip definitely responsible for appropriate and accurate result. Prior accepting it for perceptive purposes the microfluidic biochip must confirm its precision and robustness. In this article, an aspect of fast fault diagnosis appliance for perceiving double faults and recognizing the fault locations within the biochip is introduced. If the biochip is defect free then the proposed approach computes the traversal time as well. The suggested result outpoured that the propound technique is competent, efficacious as well as delineate signifying improvement over the surviving method. Furthermore this paper added expedient reconfiguration contrivance.
2 citations
TL;DR: Results indicates that the heuristic method is able to estimate fault point distances, however, the estimated fault point tolerates in a variable zone.
Abstract: This paper presents a heuristic method for fault location in transmission lines. It is established based on synchronized voltages sampling in line terminals using morphology approach. The proposed method uses only pre and during fault voltage phasors while traditional distance protection approaches require current transformers (CT) (with the issue of CT saturation and their errors), knowledge of line parameters and Thevenin impedance calculation. The proposed method is based on the voltage variations in the stationary reference frame (α-β). The changes of enclosed area of the voltage curve in the Clark coordinate due to fault is selected as the location criteria. Results indicates that the method is able to estimate fault point distances. However, the estimated fault point tolerates in a variable zone.
1 citations
TL;DR: A smart irrigation system integrating wireless sensor network and using a low power and lossy network (RPL) protocol is presented, made in real time, based on data simulated using the Cooja simulator and Contiki operating system.
Abstract: Automated irrigation systems are important for improving agricultural productivity, and such systems can be improved through the use of wireless sensor networks (WSN) for detecting and relaying critical information including location-specific temperature, humidity, light, etc. These measurements can then be used to produce more accurate data-driven decisions. This paper presents a smart irrigation system integrating wireless sensor network and using a low power and lossy network (RPL) protocol. Irrigation supply decisions are made in real time, based on data simulated using the Cooja simulator and Contiki operating system. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License .
1 citations
1 citations
TL;DR: In this proposed network, packets have been distributed using probabilistic approach i.e.pareto for grid and random topology & performance of the network is improved for DSR Routing protocol.
Abstract: In Ad-Hoc network, devices make connection in the network through wireless medium. In these networks, each device have a unique IP address and it helps in identification of nodes for routing. Routing becomes difficult when the location of node changes. The IP address of every node should be updated, and there is a requirement of complex protocols to handle such changes. The challenges of IP addresses are many. In such wireless networks, connection is to be re-established with different IP address when a node moves from one access point to another .This will increase the latency of the network and provides interruption in service. This problem can be solved using mobile IP. It will maintain the same IP address even if the host node changes location .Hence it provides continuous connectivity in the network. In our proposed network, packets have been distributed using probabilistic approach i.e.pareto for grid and random topology & performance of the network is improved for DSR Routing protocol.
TL;DR: The BER resulted shows the improvement by using the SVD decomposition for the associated system of MIMO-OFDM and also the contribution is appeared when the system studied keeps a good BER performance when the data rate is increased by using more transmit antenna.
Abstract: We consider in this paper a MIMO-OFDM wireless communication system based on pre-coding and SVD techniques, which the system has the feedback of CSI to the transmitted side. The multi path channel, delay spread, Rayleigh fading and channel noise are assumed in the simulation of the proposed system. The zero forcing method is applied for detection the data received. The goal of our study is to evaluate the BER performance and see it with different case. The BER resulted shows the improvement by using the SVD decomposition for the associated system of MIMO-OFDM. Particularly in the complex conditions of wireless channel where we considered ten paths for propagation the signals between transmitter and receiver sides. And also the contribution is appeared when the system studied keeps a good BER performance when the data rate is increased by using more transmit antenna. As we evaluated the BER of MIMO-OFDM system done for various sub-carriers and in two guard interval lengths for the OFDM system
TL;DR: This research introduces modeling and simulations of lower order structures, specifically an H∞ robust controller, to control a hydraulic servo system and shows that the proposed controller gives satisfactory results with small settling times and no steady state error.
Abstract: Synthesis of an H∞ controller usually produces a very high order of controller, and one which is much higher than the plant, causing difficulty in implementing the controller in practical applications, especially those using small microcontrollers. However, systems are always subject to disturbances and un-modeled dynamics. This research introduces modeling and simulations of lower order structures, specifically an H∞ robust controller, to control a hydraulic servo system. A low order controller shortens the gap between the complicated H∞ controllers to the practical embedded control system application. Simulation results show that the proposed controller gives satisfactory results with small settling times and no steady state error. The resulting controller also produced better responses than that of a full order H∞ controller generated using the Matlab Robust Control Toolbox.