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This paper proposes a new current controller with modified decoupling and anti-windup schemes for a permanent magnet synchronous motor (PMSM) drive. In designing the controller, an improved voltage model, which is different from existing models in that it reflects all the nonlinear characteristics of the motor, is considered. In an actual PMSM, unintentional distortion occurs in inductance and flux...
Nowadays, the Modular Multilevel Converter (MMC) based HVDC has been considered as a promising technology to meet the increasing electric power demand. However, constructing new transmission lines becomes more and more difficult because of environmental issues. Consequently, the newly constructed DC lines have to share the right of way with existing AC transmission in close proximity. Meanwhile, as...
This paper presents simple but effective cell balancing algorithm for serially connected lithium ion batteries based on the power to energy ratio balance and relative capacity estimation. Compared to simpler balancing algorithm such as voltage based cell balancing that begins balancing after cell imbalance is detected, the proposed algorithm can predict the imbalance between cells due to capacity...
Keypoint extraction and matching has been widely studied by the computer vision community, mostly focused on pinhole camera models. In this paper we perform a comparative analysis of four keypoint extraction algorithms applied to full spherical images, particularly in the context of pose estimation. Two of the methods chosen for the comparative study, namely A-KAZE and ASIFT, have been designed considering...
This paper proposes a primary side control for series-series compensated wireless power transfer system. By eliminating the need for a communication link for signal feedback, the control method not only reduces volume and cost of the system, but also improves a dynamic response. This controller only requires the information of the primary side voltage and current to identify the load resistance and...
This paper introduces a manipulator-position control procedure for which the Kinect sensor is used with 3D-modeling data. The system consists of the Manipulator Control software and the Kinect sensing software. The Manipulator Control software is used to control the AT2, an industrial 6-DOF manipulator. The Kinect sensing software is used to obtain the positional data of the object whose 3D-model...
In this paper, we propose a hybrid human motion capture method that combines the advantages of optical motion capture device and sensor type motion capture device. First, calibration of multiple cameras is performed to obtain position and attitude information of a rigid body composed of markers. Then, 15 AHRS sensor modules were attached to individual segments of the human body, arms, legs, and body...
In this paper, the system-level performance of nonorthogonal multiple access (NOMA) in coordinated direct and relay transmission (CDRT) is investigated. Considering a successive interference cancellation (SIC) receiver under the 3D channel model for LTE, the system-level performance of the NOMA-CDRT is compared to the NOMA in non-coordinated direct and relay transmission (nCDRT). Simulation results...
The orbital angular momentum modes increase the system capacity and the spectral efficiency when multiplexing technology in microwave and optic communication systems is used. Despite its effectiveness, OAM for wireless communications has problems due to its divergence characteristics. In this paper an orbital angular momentum beam by the microwave antenna was presented as a pseudo-bessel mode which...
To provide an emergency alert signaling to digital receiving devices such as Set-Top Box(STB), The Emergency Alert signaling (EAS) framework is required to allow cable operators to disseminate emergency alert information related to emergencies and warnings rapidly. However, most existing devices do not comply with the EAS requirements because it was regarded as an optional function for handling EAS...
As the essential role of data analysis in obtaining valuable information increases, the importance of acquiring useful data has also increased, especially within an Internet of Things (IoT) era. In this context, proper access control technique is required, because excessive data collection and analysis can lead to security breaches. However, existing access permission/denial binary access control...
This research is focusing on causality between activities of ICT firms and technological changes as convergences with a research question about how ICT firms should do for technological convergence, as well as factors that enable accelerating that technological convergence from their perspective. Therefore, this study sees ICT convergence as a technological change from the interaction between ICT...
In this paper, we attempt to manage GC overhead at the operating system level. In our approach, first, we use a machine learning technique to devise a GC detecting mechanism at the operating system level, and second, we show that by making use of this mechanism performance variance normally observed on SSDs can be reduced. We develop a GC-detector that detects garbage collection of SSDs and request...
A cable-driven parallel robot (CDPR) consists of elastic cables instead of rigid links. The lightweight of cables enables the CDPR applications for high payload, high speed and large workspace. However, the elongation of polymer cables can cause positioning error of the end-effector (EE) especially for heavy material handling application. In this paper, we propose an open loop load compensation algorithm...
A unidirectional security gateway is a network system in which data can travel in only one direction. Therefore, the system are used in protecting the safety and reliability of various critical infrastructures. Most of all, it has to be deployed with send and receive transceivers disconnected for one direction to ensure information security. In this paper, we introduce a unidirectional security gateway...
In recent days, demands for public safety services have increased because of increased crimes. This paper proposes multi-log analysis platform (M-LAP) for supporting public safety service. The M-LAP gathers image and sensor data of people, objects, and places, and then analyzes the data for detecting and predicting dangerous situations. The M-LAP also provides protectors (e.g., police officer) and...
In this paper, we propose a novel pseudo-random beamforming (BF) technique in multi-cell downlink networks consisting of multiple base stations (BSs) and one BS coordinator. In the proposed technique, each BS first generates M BF matrices with a pseudo-random manner and each mobile station (MS) opportunistically feeds back the received signal-to-interference-and-noise (SINR) ratio for each random...
In this paper, we introduce seven emotions and positive and negative emotion recognition methods using facial images and the development of apps based on the method. In previous researches, they used the deep-learning technology to generate models with emotion-based facial expressions to recognized emotions. There are existing apps that express six emotions, but not seven emotions and positive and...
This paper presents a switching-based charger with a time division fast charging (TDFC) control to decrease circuit complexity and charging time for multiple batteries. Time division scheme can deliver a different energy amount to each battery to achieve battery voltage balance and remove the effect of the battery's parasitic resistor to prolong the charging time in constant current (CC) stage. To...
This paper presents the FPGA implementation of neuron block units based on a sigmoid activation function for artificial neural networks (ANNs) applications. The Coordinate Rotation Digital Computer (CORDIC) algorithm has been employed for the approximation of sigmoid activation function. The proposed design was simulated using ModelSim XE II and synthesized using Altera's Quartus II with a Cyclone...
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