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The design and testing of unmanned aerial vehicles is a difficult task due to the high risk of damage to property during testing, to prevent accidents from happening it is indeed necessary to perform extensive simulation of controllers to ensure good stability and performance. We have been working to solve this problem by developing a realistic simulator by using a complete mathematical model of the...
Given the proliferation of Unmanned Aerial Systems (UASs) for military and commercial purposes, there is a fast-approaching need for comprehensive and robust systems which secure the UAS for public safety and assurance of military goals. This paper puts forth a comprehensive system of protecting UASs against hardware and software attacks, at the lowest and highest semantic levels. This approach monitors...
To accelerate research and development of the autonomous capabilities of micro aerial vehicles we have developed flight control framework, ROSflight, as a research tool. ROSflight makes development of autopilot code easier and more efficient by minimizing the use of embedded systems, incorporating the Robot Operating System and using off-the-shelf and open-source hardware and software. Motivation...
An effective sensor node placement in a Wireless Sensor Network (WSN) is one of the ways to provide a WSN with maximum coverage, maximum connectivity, minimum deployment cost and minimum energy consumption. Territorial Predator Scent Marking Algorithm (TPSMA) has been recently proposed by the authors. This paper presents an intruder detection system based on TPSMA. The performance of the TPSMA intruder...
This study looks at the need for a device that monitors upper extremity movements. The device needs to be able to predict gestures on-board to provide immediate feedback. Linear Discriminate Analysis and Support Vector Machine Light and Support Vector Machine Multiclass libraries were implemented on an Atmel embedded system to investigate the limitations. For the Support Vector Machine Light implementation...
This paper presents new system-level design for the cognitive sensor based on energy detection to boast the performance accuracy by maintaining a queue of energy samples and computing their average to determine the decision threshold. Thereafter, these values summed over average number of samples are again compared with the recent energy value to decide whether the spectrum is occupied or unoccupied...
We present a fixed-point architecture for adaptivebeamforming that optimizes resource consumption by utilizing a Look-Up-Table (LUT) approach suitable for FPGA designs. Thehardware design is fully customized and allows the user to switchto different beam patterns and adapt hardware resources torequirements on accuracy. Experimental results are veryencouraging as they show the design to be highly resilient...
The goal of this paper is to discuss the application of fog computing concept realized with embedded systems for environment monitoring in case of emergency situations such as flood, earthquakes, landslides, etc. We also present a practical realization of a hardware-software platform for such a system by applying the described ideas to a smart levee monitoring station. The realization of our concept...
The article describes the architecture and use cases of the vehicles external control unit (BBCU — BODY & BOARD CONTROL UNIT) for the vehicle communication within global traffic systems including traffic security and safety (Car2Car, Car2Infrastructure concepts supported), IoT architectures as well as Smart Cities applications. The BBCU is an embedded system optionally supplemented with graphical...
Distributed Embedded Control Systems (DECSs) used for Real-Time (RT) critical applications must satisfy stringent time requirements and attain high reliability. FTT-Ethernet provides nodes of DECSs with real-time communication capabilities, but does not include Fault Tolerance (FT) mechanisms. The FT4FTT project aims at proposing a complete FT architecture for RT critical DECSs. It uses a duplicated...
This study describes the work of implementing tilt sensing for accelerometers into the patented companion chip architecture. The core hardware block for transforming acceleration into tilting angles is based on a patented low complexity algorithm and hence the gate count takes only a few thousands for the whole chip. The chip cannot only replace the role of an accelerometer providing acceleration...
We present a system, called PL-Tags, for detecting the presence of batteryless tags in a building or home through the power lines. The excitation (or interrogation) and detection of these tags occurs wirelessly entirely using the powerline infrastructure in a building. The PL-Tags proof-of-concept consists of a single plug-in module that monitors the power line for the presence of these tags when...
The demand placed on wireless networks operating within fixed allocations of licensed or unlicensed spectrum has introduced the development of cognitive radios, capable of intelligently utilising spare resource whenever it is available. Since WiFi is an ubiquitous method for localized high speed mobile internet access it exists in almost all typical radio environments however the spectrum in which...
Direct-conversion radio transceivers can offer reprogrammable and low-cost hardware solutions for full-duplex (FD) cognitive radio (CR) devices. However, they are susceptible to radio frequency (RF) impairments, such as in-phase (I) and quadrature (Q) imbalance (IQI), which can significantly constrain the spectrum sensing capabilities. This paper is devoted to quantify and evaluate the effects of...
Traditional power grid is not resistant to severe weather conditions, especially in remote areas. For some areas with few people, such as islands, it is difficult and expensive to maintain their connectivity to the traditional power grid. Therefore, a self-sustainable microgrid is desired. However, given the limited local energy storage and energy generation, it is extremely challenging for a microgrid...
Direct-conversion radio transceivers can offer reprogrammable and low-cost hardware solutions for full-duplex (FD) cognitive radio (CR) devices. However, they are susceptible to radio frequency (RF) impairments, such as in-phase (I) and quadrature (Q) imbalance (IQI), which can significantly constrain the spectrum sensing capabilities. This paper is devoted to quantify and evaluate the effects of...
This paper presents prototype implementation of low-cost, open hardware, static — gesture recognition system. The implemented system has three major components: A Glove and Sensor Unit (GSU) — consisting of a pair of gloves embedded with custom made, low-cost flex and contact sensors, a Primary Supporting Hardware (PSH) that maps change in input values from GSU, a Secondary Supporting Hardware (SSH)...
Analog-to-Information Converters (AICs) represent the implementation of the Compressed Sensing theory in practice. An AIC is a device that takes as input an analog signal and, unlike traditional ADCs, gives as output a digitized and compressed version of the input. In the literature, some AIC architectures have been proposed. Although the topic is relatively new several efforts have been made in the...
The ability of monitoring a laboratory scale power system is crucial for research and educational purposes. This paper proposes the development of a low-cost real-time platform for monitoring a laboratory scale power system. The design and development of this novel monitoring system is based on a TMS320F28335 microcontroller of Texas Instruments. The microcontroller reads voltage and current measurements...
Heartbeat monitoring during sleep is critically important to ensuring the well-being of many people, ranging from patients to elderly. Technologies that support heartbeat monitoring should be unobtrusive, and thus solutions that are accurate and can be easily applied to existing beds is an important need that has been unfulfilled. We tackle the challenge of accurate, low-cost and easy to deploy heartbeat...
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