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With the advancement of technology, the uses of Multi-UAV networks have been rising, especially in life-threatening tasks of disaster management and military operations. Multi-UAV networks face various security issues because of being a member of an Adhoc network family. There is a dire need to design a threat model that can identify threats, quantify risks involved and address them. In this paper,...
As a new type of flexible drive, pneumatic artificial muscle (PAM) has been widely concerned in various fields, but the research on the dynamic characteristics is difficult because of its strong nonlinearity and hysteresis. In this paper, the effects of system hardware configuration and control algorithm on the dynamic displacement characteristics of the double parallel Mckibben artificial muscles...
In the paper, a method for the estimation of type I and type II errors of the built-in diagnostic hardware depending on the preventive maintenance periodicity is proposed. The approach considers an operational process of electronics as a Semi-Markov process with states of hazardous, latent and fictitious failures. The derived expressions may be used for the evaluation and analysis of the mentioned...
Histogram of Oriented Gradient (HOG) is a popular feature description for the purpose of object detection. However, HOG algorithm requires a high performance system because of its complex operation set. In HOG algorithm, the cell histogram generation is one of the most complex part, it uses inverse tangent, square, square root, floating point multiplication. In this paper, we propose an accurate and...
Video coding has become widespread through mobile devices. At the same time, the adopted resolutions have been enlarged, demanding more coding efficiency and motivating the development of the new state-of-the-art standard, High Efficiency Video Coding (HEVC). However, to achieve the required efficiency the new standard greatly increased the computational intensity. That, allied to real-time constraints...
The increasing resolutions combined with storage and processing limitations of mobile devices point to the need for new compression techniques for video coding. Meanwhile, to achieve higher compression rates without compromising quality, the coding process becomes more and more complex. In reference software of HEVC the most time consuming step is the execution of Motion Estimation (ME), which is...
This paper presents a complete on-chip ADC BIST solution based on a segmented stimulus error identification algorithm known as USER-SMILE. By adapting the algorithm for efficient hardware realization, the solution is implemented towards a 1Msps 12-bit SAR ADC on a 28nm CMOS automotive microcontroller. While sufficient test accuracy is demonstrated, the solution is further extended to correct linearity...
Energy storage technology is an important measure for power output of new energy generation system. T-type three-level structure is adopt as the topology of energy storage inverter. Mathematical model of grid-connected operation in ABC coordinate system and dq coordinate system is built. A double closed loop control strategy of which inner loop current and outer loop power control is proposed. The...
The high number of cells employed in a Modular Multilevel Converter represents a challenge for the control hardware. Some authors have proposed the use of digital communications to simplify the assemblage and maintenance in such converters, but the latency they add has undesirable consequences for the closed-loop performance. In this paper, we propose a model-based compensation of the latency that...
In this paper, a guidance law for tracking straight-line segment and a constant-altitude circular orbits are proposed for a fixed wing unmanned aerial vehicle (UAV). Both guidance laws are based on the notion of vector fields, which are used to generate desired commands to the inner-loop attitude controller. Ground track heading error and lateral following error approach zero asymptotically even in...
The aim of this paper is to present the implementation of an Embedded Real-Time Simulator (ERTS) for Modular Multilevel Converters (MMCs), using low-cost System-on-Chip (SoC) platform. In order to achieve new functionalities such as sensor-less control, monitoring, diagnostic and fault detection, the MMC plant model can be implemented along with the controller. In MMC applications, the implementation...
Underwater communication with autonomous underwater vehicles (AUVs) has strong demands on the modems caused by the constantly changing signal propagation (multi-path propagation, scattering, diffraction and refraction at thermal layers, etc.) of the underwater channel. These demands typically lead to a modem designed to match specific conditions. In this paper we present an automated model-based physical...
Sophisticated cyber attacks by state-sponsored and criminal actors continue to plague government and industrial infrastructure. Intuitively, partitioning cyber systems into survivable, intrusion tolerant compartments is a good idea. This prevents witting and unwitting insiders from moving laterally and reaching back to their command and control (C2) servers. However, there is a lack of artifacts that...
With the development of NFV (Network Function Virtualization) paradigm, networking functions would gradually move from specialized and proprietary hardware to open-source software run over a virtual machine (VM) deployed on commodity hardware. Open vSwitch (OVS) is the most prominent open-source solution implementing a virtual switch, while DPDK (Data Plane Development Kit) is a set of specialized...
Fault detection is a necessary requirement to exploit one of the most important multiphase drives advantages: the enhanced fault tolerance without additional hardware. Among open-circuit faults, those in power switches of voltage source converters (VSCs) are the most common ones. Nevertheless, in other cases a poor connection or incipient faults may cause an imbalance in the value of the stator resistances...
Quad-rotor Micro Aerial Vehicle (MAV) is a multi-rotor MAV with 4 propellers which propel the MAV up to the air and move around. It has high maneuverability to move around, such as roll, pitch and yaw movements. However, line of sight and radio control effective range are the major limitation for the MAVs which significantly shorten the travel distance. Therefore, we proposed a waypoint navigation...
Many software mechanisms for geophysics exploration in Oil & Gas industries are based on wave propagation simulation. To perform such simulations, state-of-art HPC architectures are employed, generating results faster and with more accuracy at each generation. The software must evolve to support the new features of each design to keep performance scaling. Furthermore, it is important to understand...
The currently used hardware validation architectures for Application Specific Integrated Circuits intended for automotive Engine Control Unit development are reviewed and a new architecture is proposed. An alternative to hardware validation by different simulation architectures is proposed and analyzed.
Because the numerous nonlinear components and fiber interfaces are used in Module Multiple Converter (MMC), the HIL test of MMC with detailed EMT model and the full-scale interface is hard to be implemented. In recent years, this existing disadvantage caused the MMC controller hardware and software difference between the HIL test and real project. In this paper, a detailed EMT model of hybrid MMC...
This study presents the practical results concerning model-based development educational practices implemented by Hiroshima University and Mazda Motor Corporation, an automobile manufacturer, and the consequent educational effects. In recent years, diversification and complexity of product structures have become prominent. Simultaneously, there is an increasing demand for short-period development...
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