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Combining of nonlocal means and variational models can extend the ability of image processing such as texture image processing. In this paper, an implementation scheme of nonlocal variational models is proposed, which contains discretization, coordinate transformation, and dimension expansion. Firstly, continuous models are transferred to discrete model. Then we transform absolute coordinate to relative...
This paper presents a Maximum Power Point Tracking (MPPT) method applying an Adaptive Neuro-Fuzzy Inference System (ANFIS) for a stand-alone photovoltaic (PV) system. The proposed ANFIS-based MPPT technique determines the optimal operating point of a PV system which is designed in conjunction with a Z-source DC-DC converter as an interface between the PV array and the load. In the ANFIS-based MPPT...
The increasing energy demand has enhanced the use of renewable energy as the source of fossil fuel cannot meet up this demand. The photovoltaic cell converts sunlight to electricity without any pollutant emission. A complete analysis on Photo Voltaic system is required to get the maximum output. But because of some external and internal factors, the generation of maximum output power is disrupted...
This paper presents the dynamic modeling of a two-input Zeta converter topology using State-space averaging (SSA) technique. The modeling leads to a small-signal linear dynamic model of the multiple-input converter (MIC), from which the transfer functions used for feedback control design can be determined. To verify the accuracy of the obtained model, a two-input Zeta converter with inputs from PV...
In this study, the coordinate of the line position for a differential drive line-following mobile robot is estimated by using the Minimum Variance Unbiased Estimator. Using the sensor data as an observation data and coordinates of sensors, a linear model for Minimum Variance Unbiased Estimator is constructed. MATLAB simulations for computing Root-Mean-Square-Error and Monte Carlo Simulations and real...
IDMA used not only in cellular communication but also in under water communication. IDMA is Fourth generation (4G) research. Some more researches are under process for making the data transmission efficient. Open the new path for future optical communication with IDMA scheme incorporated with Power rotational interleavers. The basic purpose of this design is to reduce the bandwidth occupied by the...
Partial shading of PV array occurs when it gets covered by some passing clouds, buildings or nearby modules. Analysis of electrical behavior of PV array in case of partial shading done so far considers only the fall of different solar irradiance on different modules with working temperature of all PV panels same as ambient temperature. This paper presents the mathematical formulation of cell working...
The performance of a photovoltaic (PV) array is affected by many factors, including its integration into a system. Without a maximum power point tracking (MPPT) algorithm, the PV array will operate at the voltage of its load, which often is not the maximum power point (MPP); therefore, causing the PV array to not produce its maximum power output. This paper discusses a current MPPT technique (Perturb...
Currently PV modules are positioned to receive the highest amount of incident radiation in a year. Therefore, the generation pattern is independent of the consumption and a large storage is required to compensate for the same. This paper studies the possibility of orienting the modules differently in order to match the consumption more efficiently.
It is often difficult to model the effects of partial shading conditions on PV array performance, as shade losses are nonlinear and depend heavily on a system's particular configuration. This work describes and implements a simple method for modeling shade loss: a database of shade impact results (loss percentages), generated using a validated, detailed simulation tool and encompassing a wide variety...
This paper presents a simulation of the principle of antenna type Crow's nest. The crow' nest antenna is a phased array antenna with radiating elements distributed randomly in a sphere. The random distribution of elements contributes to avoid grating lobes and the spherical shape allows full elevation and azimuth coverage of pencil-beam steering. Phase of each element depends on steering direction...
This paper presents the development of a multivariable control system for regulation of the physical quantities associated to the fouling phenomena on an experimental platform. This platform is considered as a two-by-two system, i.e., the voltage and current as the inputs system and the flow and pressure as the outputs system. In the Matlab scripts, the plant model was identified as a set of first-order...
This paper presents a technique to build a simulation model of a Photovoltaic (PV) array using Solar PV data. The Solar PV data is fetched from a physical solar panel operating at a solar power generating station. PV arrays are generally modeled using mathematical equations that describe the behavior of PV system and simulated in MATLAB with mathematical operator library and functions. The proposed...
This paper focuses on a RFID-Based dynamic positioning scheme, aiming to locate an object by using a moving RFID reader and reference tags without recording any measurement data, e.g., the time of arrival (TOA) of the signal, or the received signal strength indication (RSSI). To address the problem of blindness of location path, a RFID-based positioning scheme with MATLAB GUI, is proposed based on...
This Harnessing energy from the abundant and free sunlight is now a days a hot-topic among the research community. The availability of cheap solar modules has made it possible to harvest solar energy with better efficiency. The nature of solar modules is nonlinear and therefore the process of impedance matching is essential. The proper impedance matching ensures extraction of the maximum power from...
Dataflow computation is a powerful paradigm for parallel computing that is especially attractive on modern machines with multiple avenues for parallelism. However, adopting this model has been challenging as neither hardware-nor language-based approaches have been successful, except, in specialized contexts. We argue that general-purpose array languages, such as MATLAB, are good candidates for automatic...
The work portrayed in this paper furnishes knowledge about advanced solar photovoltaic (PV) conversion system. This PV system is fast and tracks more output power than conventional PV systems. In literature, the PV parameters of a double exponential model were designed with the help of Levenberg-Marquardt algorithm. In this paper, the PV parametric values were taken into consideration and implemented...
Random mismatch errors in the resistor networks are one of the dominant nonlinearity sources for high resolution and high accuracy resistor DACs. This paper applies the theory of ordered element matching in a high resolution segmented R-2R DAC. It can achieve high matching accuracy by regrouping the resistors in the MSB array according to their resistance ranks obtained by the INL test. The implementation...
This paper presents a comparison of different electrical equivalent mathematical models for a PV cell/module/array based on Shockley diode equation. The presented different models include single diode model and double diode models. These models accept solar irradiance and temperature as input parameters and yield the I-V & P-V output characteristics. A control algorithm called MPPT (maximum power...
This paper proposes a generalized model of the photovoltaic cell in Matlab-Simulink. This proposed model is based on basic mathematical equation of solar photovoltaic cell. The PV modules have non-linear output characteristics. The output I-V and P-V characteristics of photovoltaic cell are depend on sunlight irradiance and cell temperature. The model can be used to extract the physical parameters...
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