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Automation systems, as well as process control, has played a key role in the industry nowadays. For good system performance, it is necessary that mathematical model is closest to the real model, which is detailed in this work. The objective of this study is to present a modeling (considering the viscous friction), stability analysis and simple PID controller tuning using as an example, an arm with...
A formation flight controller can be used in a UAS fleet to avoid collision, reduce fuel consumption, or to execute interactions between the UASs, such as autonomous aerial refueling. In this paper, an autonomous formation flight (AFF) controller based on non linear dynamic inversion (NLDI) and a non-colliding path planner are proposed. The proposed NLDI AFF extends a NLDI controller found in literature...
This papers proposes two novel approaches for the identification of Takagi-Sugeno fuzzy models with time variant and invariant features. The proposed Mixed Fuzzy Clustering algorithm is proposed for determining the parameters of Takagi-Sugeno fuzzy models in two different ways: (1) the antecedent fuzzy sets are determined based on the partition matrix generated by the Mixed Fuzzy Clustering algorithm;...
The current demands on the energy market, such as efficiency, sustainability and affordability increase the need for customer understanding and data analysis. This paper presents an analysis of the segmentation of electricity consumers based on the fuzzy clustering of time variant electricity consumption data and invariant features like the demographic customer information. The algorithm used is mixed...
Nano-communications have tremendous potential for applications in the biomedical, environmental, industrial and military fields. Molecular communication is a new communication paradigm which allows nanomachines to exchange information using molecules as carrier. This is the most promising communication method within nanonetworks, since using electromagnetic waves is not very likely due to the size...
This work describes a current mode implementation of Izhikevich neuron model implemented with halo implanted devices 130 nm structured within matrices of order m × n capable of substantially increasing output impedance of such devices while also improving mismatch. The proposed neuron was successfully simulated in 130 nm IBM CMOS process as the dynamical translinear circuit topology adopted generates...
This paper presents the modeling calculations of a new SAR A/D converter architecture that uses a PWM generator and a first order low pass filter to build a simple circuit. In order to validate calculations, a 4 - bit successive approximation A/D converter has been simulated using Simulink and Modelsim. Then the circuit layout was developed in 0.5µm CMOS process with CADENCE Virtuoso. Post layout...
This paper presents a nonlinear H∞ controller for the rejection of input disturbances in a fixed wing UAV. The proposed controller acts in all states of a complete nonlinear dynamic model. Simulation results show that the aircraft is successfully maintained in the desired stable condition after two different disturbances: a finite pulse and noise.
A new technique of designing spectral null codes with permutation sequences is presented. These new codes have nulls at sub-multiples of the frequency of the transmitted symbols and are also DC-free codes. The choice of the corresponding channel levels given to each transmitted symbols has guaranteed the elimination of the DC component at the lower frequencies and gave an advantage on the binary spectral...
The impedance variation in power-line networks is a well known problem in power-line communications (PLC). These variations arise when different electric loads are connected and, or disconnected to the power line network at different times. This causes a problem in trying to achieve maximum power transfer, hence the need for a matching circuit. Previously we investigated transformerless power-line...
This paper proposes the application of a Particle Swarm Optimization (PSO) algorithm to the Load Flow calculation in Power Systems. The proposed methodology is based on the minimization of power mismatches in the system buses. The power flow study provides the system status in the steady-state and it is fundamental to the power system operation, planning and control. PSO is applied in a new computational...
Constant frequency One Cycle Control (OCC), as proposed by Smedley, is a powerful method for controlling switching power converters. The dimensioning of this control method for two level AC output converters is not of common knowledge. This paper describes OCC for two level switched power converters. Its instability problems and solutions are analysed and dimensioning equations are deducted. This...
A mathematical model is presented that describes the ionic transport across the cortical thick ascending limb (cTAL) of the Henle’s loop, taking into account its tubular geometry. A comprehensive description of the cTAL is given for the first time in terms of potential, ion concentrations and ion fluxes along the tubule. For given ion concentrations at the entrance of the tubule, the model simulates...
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