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Recently, integrating Softwaredefined networking (SDN) and network functions virtualization (NFV) are proposed to address the issue that difficulty and cost of hardwarebased and proprietary middleboxes management. However, it lacks of a framework that orchestrates network functions to service chain in the network cooperatively. In this paper, we propose a function combination framework that can dynamically...
It is expected that large number of IoT devices and IoT network will be connected to the Internet. In these environments, congestion of network links could be rapidly increased due to the bust IoT traffic especially related with video devices. To avoid the congestion, currently, End-devices control the congestion links by using congestion control scheme on TCP stack such as Tahoe, Reno, NewReno, and...
In this paper an embedded system for accurate control of torque, speed and position of DC motors which actuate the joints of a robotic leg is presented. The proposed embedded system is not based on dedicated and expensive motor controllers but on a general pourpose embedded board equipped with a 32bit microcontroller. For each motor the embedded system can selectively operate in three different control...
This paper describes the basic methods of the discrete transfer function from a continuous analogue, consideration of the use of real interpolation method in the sample. A current example is the comparison of methods of sampling. The work is done at the expense of grants under the program increase the competitiveness of TPU.
A general approach to controlling the operation accuracy of memristor-based hardware (MBH) is proposed herein. The following approach is based on application of the neural network algorithms, which make it possible to register the excess of the allowed inaccuracy level of signal processing in MBH. The artificial neural networks of radial basis functions meant to control the level of additive noises...
It appears to be SDN dogma that middleboxes are bad. However middleboxes form near half the elements that comprise today's networks and at least three active research fields are exploring how to improve their functionality. Fifteen recent SDN survey papers were examined for evidence to support the SDN dogma and its assertion that all network functionality belongs in the control plane, without success...
Software Defined Network (SDN) is an emerging paradigm for flexible network design and implementation. Availability metric of SDNs is critically demanding further studies. This paper aims to propose hierarchical models to assess the availability of SDNs. We incorporate various failure modes and recovery behaviors in the SDN including (i) link failures at network level, and (ii) software and hardware...
In this study, we developed low cost educational material for learning fundamentals of mechatronics by well combining Arduino, Scilab/Xcos, and hardware modules. The availability of the developed educational material is verified by a practice example.
SPA (Speaking Plant Approach) is a comparatively modern cultivation method which grows plant according to their biological information. The SPA plant factory system has suitable elements for use in engineering education. In this paper, a new education trial in KTC (Kanazawa Technical College, a private technical college in Japan) through graduate study of the SPA plant factory system construction...
In this demo, we implement a realtime testbed for Software Defined Wireless Networks (SDWN) by using Raspberry Pi as OpenFlow (OF) Switches. The implemented testbed provides practical development and testing environment for SDWNs. Moreover, we use OpenDayLight to observe the flows and events in the network. With OpenDayLight integration, we easily provide detailed analysis results for any testing...
Embedded systems (ES) based on field programmable gate arrays (FPGAs) enhance the overall computational capability and relieve computational load. The lack on design and implementation methods for specific control functions in hardware limits the application of complex control techniques. Therefore, a design methodology approach is showed in the current work. Fuzzy, LQR, and PI control systems are...
This paper presents a laboratory hardware system, developed in the Department of Electrical Power Systems of University "Politehnica" of Bucharest, that simulate an energy management system to be applied in a smart home. The core of the system is a controller that is capable of switching on/off various domestic appliances as a response to price signals. The system may be capable of communicating...
This paper aims at studying flutuations in energy conversion of a Photovoltaic (PV) system and its effects in the electric grid using real time simulation. The implemented simulation system consists of PV plants, power converters, variable load and electrical grid have been implemented in RTDS, while the control is run from a dSPACE platform. Load models have been developed based on actual demand...
The destruction of forests in Panama, the effects of climate change, collectors and illegal trafficking has led to Orchid Peristeria Elata having the status of endangered species. Known in Panama under the name Flower of the Holy Spirit, this orchid has been declared by law as representative element of Panamanian folklore. Despite the efforts made to conserve this orchid in its natural habitat, the...
Quadriplegia is a condition caused by a degenerative disease or a sudden condition that causes loss of movement from the neck down. The inactivity of the upper and lower limbs makes it impossible to drive a manual or electric wheelchair, requiring another person to get around. In response to this issue was held a control device integrated in a manual wheelchair. The control system uses electrical...
In this paper, we propose the future house automation, a PLC-based embedded system that aims reducing the house energy consumption by optimizing the entire hardware assembly and software algorithms. The project started from the idea of designing a self-controlled house, to increase user's comfort in his daily environment, reducing the cost and optimizing the energy consumption. Our embedded application...
Emerging Software Defined Networking (SDN) technology has provided excellent flexibility to large-scale networks in terms of control, management, security, and maintenance. With SDN, network architectures can be deployed and maintained with ease. New trends in computing (e.g., cloud computing, data centers, and virtualization) can seamlessly be integrated with the SDN architecture. On the other hand,...
Software defined networking (SDN) and its enabling standards, OpenFlow promise flexible and faster evolving networks, by separating the control plane from data plane so that the control plane becomes more responsive to the changes in topology, load balancing requirement, and suspicious traffics. To ever-changing security attacks, SDN also offers new potentials to handle security threats in more robust...
Aiming at Brushless DC Motor (BLDCM) with a Hall rotor position sensor, this paper presented the design method and implementation of BLDCM control system based on the low cost sine-wave driving method. The period and amplitude of the modulating sine wave were obtained according to the position and velocity information included in the three-phase Hall signals. Then on this basis, the three closed-loop...
Industrial control systems (ICS) are integral components of production and control processes. Our modern infrastructure heavily relies on them. Unfortunately, from a security perspective, thousands of PLCs are deployed in an Internet-facing fashion. Security features are largely absent in PLCs. If they are present then they are often ignored or disabled because security is often at odds with operations...
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