Mathematical Model of Multi-Frequency Piezoresonance Oscillation System
Alexander A. Zelensky,
Sergey K. Pidchenko,
Alla A. Taranchuk
Issue:
Volume 1, Issue 1, January 2013
Pages:
1-8
Published:
10 January 2013
Abstract: The paper represents the basic model of multi-frequency piezoresonance oscillation system (MPOS) – the piezoresonance devices (PRD) core, which enables to study the processes of establishing multi-frequency oscillation mode and its stability. The basic structure of multi-channel multi-frequency PRD core, which is based on principles of filter schemes, is proposed, and the main designations are entered. The peculiarities of truncated differential equations for amplitude, phase and auto-bias voltage of MPOS for the quantity of simultaneously generated frequencies are examined. On the example of three-frequency mode of oscillation under polynomial approximation of transferable characteristics of active elements the characteristic cases of establishing oscillations in MPOS are represented. The area of a steady three-frequency oscillating behavior is defined and the assessment of time of establishment of oscillations and value of group runout of frequencies is made. Received results enable to form a new approach to construction of piezoresonance devices with controlled dynamics, which are represented in the form of adaptive controlled systems with predictive standard model and develop on its basis the new class of invariant to destabilizing disturbing PRD factors. On the basis of such approach there is the principle of using natural redundancy in multi-frequency basis of PRD core – multi-frequency oscillation system, which enables not only to synthesize the system with current identification of disturbing factors on basis of instruments of invariance theory, but also do the adaptation of PRD in accordance with their influences.
Abstract: The paper represents the basic model of multi-frequency piezoresonance oscillation system (MPOS) – the piezoresonance devices (PRD) core, which enables to study the processes of establishing multi-frequency oscillation mode and its stability. The basic structure of multi-channel multi-frequency PRD core, which is based on principles of filter schem...
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Radio over Fiber Networks Synthesis Using Meta-Heuristic BCO
Alexander Pereverzev,
Dmitry Ageyev
Issue:
Volume 1, Issue 1, January 2013
Pages:
9-15
Published:
10 January 2013
Abstract: Radio access network over fiber (RoF) technology combines both wireless and fiber-optic technology. The advantages of this technology are low attenuation, bigger network bandwidth, easy installation and management, reduced power consumption, multiservice, dynamic allocation of resources. There are many methods of designing optical and wire-less networks. Since RoF combines these technologies, the design tasks are a complex problem. Therefore there is a need for a new design method for RoF technology. The main problem in designing DWDM transport networks is the wavelength assignment of light paths. If the network topology has a great need to use heuristic methods there is one way to solve this problem: use of the BCO-RWA algorithm. Meta-based heuristic algorithm BCO-RWA contains the modeling of the beha-vior of bees collecting nectar. The main advantage of this algorithm is low computational complexity. However, BCO-RWA has the following disadvantage: during the calculation of route selection probability, base algorithm does not take into account the nonlinear four-wave mixing phenomenon. In this paper we present new method to design RoF network and modification of BCO-RWA algorithm.
Abstract: Radio access network over fiber (RoF) technology combines both wireless and fiber-optic technology. The advantages of this technology are low attenuation, bigger network bandwidth, easy installation and management, reduced power consumption, multiservice, dynamic allocation of resources. There are many methods of designing optical and wire-less net...
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