H ? filtering for stochastic singular fuzzy systems with time-varying delay

This paper considers the H? filtering problem for stochastic singular fuzzy systems with timevarying delay. We assume that the state and measurement are corrupted by stochastic uncertain exogenous disturbance and that the system dynamic is modeled by Ito-type stochastic differential equations. Based on an auxiliary vector and an integral inequality, a set of delay-dependent sufficient conditions is established, which ensures that the filtering error system is e?t - weighted integral input-to-state stable in mean (iISSiM). A fuzzy filter is designed such that the filtering error system is impulse-free, e?t -weighted iISSiM and the H? attenuation level from disturbance to estimation error is belowa prescribed scalar.Aset of sufficient conditions for the solvability of the H? filtering problem is obtained in terms of a new type of Lyapunov function and a set of linear matrix inequalities. Simulation examples are provided to illustrate the effectiveness of the proposed filtering approach developed in this paper

Robust Multivariable controller Design with the simultaneous H2 /H∞/µ for Single Person Aircraft

In a physical system several targets are normally being considered in which each of nominal and robust performance has their own strengths and weaknesses. In nominal performance case, system operation without uncertainty has decisive effect on the operation of system, whereas in robust performance one, operation with uncertainty will be considered. The target of present paper is a balance between nominal and robust performance of state feedback A new approach of present paper is the combination of two controllers of μ and H2/H∞.  The controller for robust stability status, nominal performance, robust performance and noise rejection are designed simultaneous. Controller will be achieved from solving constraint optimization problem. Where a simultaneous H2 /H∞/µ robust multivariable controller has been designed over an X-29 Single Person.  This model has three inputs and three outputs, where the state space equations of the system response to an unstable one. Simulation results show the effectiveness and benefits of the method.DOI:http://dx.doi.org/10.11591/ijece.v3i2.235

Multi-objective trajectory optimization of Space Maneuver Vehicle using adaptive differential evolution and modified game theory

Highly constrained trajectory optimization for Space Manoeuvre Vehicles (SMV) is a challenging problem. In practice, this problem becomes more difficult when multiple mission requirements are taken into account. Because of the nonlinearity in the dynamic model and even the objectives, it is usually hard for designers to generate a compromised trajectory without violating strict path and box constraints. In this paper, a new multi-objective SMV optimal control model is formulated and parameterized using combined shooting-collocation technique. A modified game theory approach, coupled with an adaptive differential evolution algorithm, is designed in order to generate the pareto front of the multi-objective trajectory optimization problem. In addition, to improve the quality of obtained solutions, a control logic is embedded in the framework of the proposed approach. Several existing multi-objective evolutionary algorithms are studied and compared with the proposed method. Simulation results indicate that without driving the solution out of the feasible region, the proposed method can perform better in terms of convergence ability and convergence speed than its counterparts. Moreover, the quality of the pareto set generated using the proposed method is higher than other multi-objective evolutionary algorithms, which means the newly proposed algorithm is more attractive for solving multi-criteria SMV trajectory planning problem

Análisis de la direccionalidad armónica a nivel tensión de 60 KV para optimizar el funcionamiento de la sub estación Chiclayo Oeste de 220 / 60 KV

El sistema interconectado nacional en el Perú permite el abastecimiento de energía eléctrica a todos los usuarios del sistema, la transmisión de energía eléctricas desde los puntos de generación hasta los consumidores se realiza en niveles de tensión de 220 KV y 500 KV. La Sub estación Chiclayo-Oeste es la que conecta el sistema eléctrico de Chiclayo con el sistema eléctrico nacional, posee un patio de llave del 220 KV y otro en 60 KV, ambos en configuración doble barra más celda de acople, con el incremento de los equipos electrónicos viene consigo el incremento de las alteraciones. Se ha procedido a un registro y análisis de los principales armónicos (Tercer, Quinto, Séptimo, Noveno y Décimo Primer Armónico), en un periodo de tres meses, tanto en horas punta, como en horas fuera de punta, día de semana, día de fin de semana (sábado , domingo y feriados), los datos y formas de onda incluyen la siguiente información: tres voltajes, V1, V2, V3 y tres corrientes I1, I2 e I3; distribución espectral en magnitudes por armónico, distribución espectral en ángulo de fase por armónico, formas de onda y espectro de frecuencia. La aparición de una serie de perturbaciones, denominados armónicos de tercera, quinta, séptima, novena y undécimo nivel, lo cual origina la distorsión de la onda Senoidal elemental y el incremento del RMS (Valor medio efectivo de la onda de voltaje y de la onda de corriente), con el consecuente sobrecalentamiento, sobretensión y sobre amperaje de las redes. Las distorsiones son eliminadas con un sistema de filtrado, los filtros son calculados por complejos procedimientos que se basan en las series de Fourier. La mejora de la calidad de energía eléctrica nos permite corriente más estable y menos interrupciones además de menor cantidad de multas por parte de la entidad reguladora y fiscalizadora. La inversión inicial de suministro y montaje ha sido estimada es de S/ 469,640, con un valor estimado de ingresos de S/ 443,000 soles al año, lo cual nos permite el manejar un flujo de caja a soles constantes y flujos económicos, que nos determinan indicadores de VAN (Ganancia), de S/ 1,209,678 Soles y una rentabilidad de 80.23 % al año

Advances in PID Control

Since the foundation and up to the current state-of-the-art in control engineering, the problems of PID control steadily attract great attention of numerous researchers and remain inexhaustible source of new ideas for process of control system design and industrial applications. PID control effectiveness is usually caused by the nature of dynamical processes, conditioned that the majority of the industrial dynamical processes are well described by simple dynamic model of the first or second order. The efficacy of PID controllers vastly falls in case of complicated dynamics, nonlinearities, and varying parameters of the plant. This gives a pulse to further researches in the field of PID control. Consequently, the problems of advanced PID control system design methodologies, rules of adaptive PID control, self-tuning procedures, and particularly robustness and transient performance for nonlinear systems, still remain as the areas of the lively interests for many scientists and researchers at the present time. The recent research results presented in this book provide new ideas for improved performance of PID control applications

A vision-based optical character recognition system for real-time identification of tractors in a port container terminal

Automation has been seen as a promising solution to increase the productivity of modern sea port container terminals. The potential of increase in throughput, work efficiency and reduction of labor cost have lured stick holders to strive for the introduction of automation in the overall terminal operation. A specific container handling process that is readily amenable to automation is the deployment and control of gantry cranes in the container yard of a container terminal where typical operations of truck identification, loading and unloading containers, and job management are primarily performed manually in a typical terminal. To facilitate the overall automation of the gantry crane operation, we devised an approach for the real-time identification of tractors through the recognition of the corresponding number plates that are located on top of the tractor cabin. With this crucial piece of information, remote or automated yard operations can then be performed. A machine vision-based system is introduced whereby these number plates are read and identified in real-time while the tractors are operating in the terminal. In this paper, we present the design and implementation of the system and highlight the major difficulties encountered including the recognition of character information printed on the number plates due to poor image integrity. Working solutions are proposed to address these problems which are incorporated in the overall identification system.postprin