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This paper studies the use of Genetic Algorithms (GA) in the design of Fuzzy Logic Controllers (FLC) and show how population size, probability of crossover and rate of mutation can effect the performance of the GA. The comparison of various parameters shows that GA is helpful in improving the performance of FLC. A fuzzy logic is fully defined by its membership function. What is the best to determine...
This paper proposes the tuning of fractional order PID (FOPID) controller of electromagnetic actuator (EMA) system for aero fin control (AFC) using particle swarm optimization (PSO). The EMA is realized with permanent magnet brush DC motor which is driven by a constant current driver. Using the non-linear model of EMA-AFC system which includes the non-linearities of DC motor, an FOPID position controller...
The quality of an intelligent control system is the ability to control the process with a certain degree of autonomy. These requirements, as an autonomous process controller are ever increasing. Considering the fact that existing algorithm based controllers such as the adaptive PID have their own limitations/are inadequate, the controllers are designed to emulate human mental faculties such as adaptation,...
The objective of this work is the development of DMC for a shell and tube heat exchanger and to address the difficulties in tuning a DMC. Although the PID controller is widely used for these types of applications there is still a need for optimization of conservation of energy. In this paper a model based predictive algorithm is used for controlling a temperature of a fluid stream using the shell...
The objective of this work is the development of predictive controller of heat exchanger and addresses the difficulties in tuning a predictive control, predictive control and state feedback controller is used to regulate the temperature of a heat exchanger. The identification of the heat exchanger is done by using the step identification technique. Although the PI controller is widely used for these...
An optimal adaptive controller for multidimensional disturbed systems is concerned in this paper. The system parameters, especially the first parameters of the controller, are unknown a prior. The one-step-ahead adaptive controller is designed based on the input matching technique and the extended least-squares (ELS) algorithm. It is shown that the system identification is consistent and the adaptive...
This paper presents the design of fuzzy PI+D controller and fuzzy PID controller for nonlinear systems using 'Gaussian' membership functions. The fuzzy controllers are derived from their conventional continuous time domain controllers. The controllers are developed by first discretizing the controllers' laws and then progressively deriving the steps necessary to incorporate a fuzzy logic control mechanism...
This paper proposes a new technique for designing a fixed-structure robust load frequency controller for a two area interconnected power system. The proposed technique uses Linear Matrix Inequality (LMI) method to form an initial solution, and then the global search algorithm, Compact Genetic Algorithm (cGA), is adopted for evaluating the final solution. By combining both techniques, LMI and cGA,...
With today's advanced technologies, various types of distributed energy resources (DERs) with relatively fast controllability option have been brought into practical applications. This paper presents a metaheuristic-based controller design of controllable DER for stability enhancement based on synchronized phasor measurements. With the most recent data, a simplified oscillation model (SOM) is evaluated...
In this paper, a model predictive control method is proposed to improve the performance on both temperature control and energy conservation for central air-conditioning system. Since the lack of consideration of the impact of cooling load can lead to a limitation on the energy saving effect, a cooling load model is proposed. Parameters in cooling load model, as well as the temperature model and energy...
Motor and its control technology is one of main components of Hybrid Electric Vehicles (HEV). To meet the fast torque response demands of HEV, rotor flux-oriented based vector control algorithm with simulation model is concerned and modular design for hardware and software of controller is present in the paper. Series of anti-jamming and vibration isolation measurements are taken especially to ensure...
This paper describes a digital proportional-integral-derivative (PID) controller technique applied to the DC-DC buck converter. The converter is modelled using a state space averaging technique. Due to the non-linear of the power converter, the PID controller is designed to simplify the compensation of the DC-DC converter. The control algorithm is implemented in digital signal processor (DSP) TMS320F2812...
This paper proposes a new extended boost quasi Z-source inverter (ZSI) and a simple modulation and control method based on one-cycle control for controlling a grid connected PEM fuel cell energy system. ZSIs are gaining popularity. Similarly one-cycle controllers are becoming popular due to their simplicity, ease of implementation and fast response. However, this control method has not been developed...
A controller for a tunneling accelerometer has two tasks: to establish tunneling and to maintain tunneling during acceleration. This paper describes the design and implementation of a digital controller that accomplishes these tasks and provides the appropriate gain switching. The control law is based on a standard configuration of an observer and state feedback. A digital controller is implemented...
Among numerous seawater treatment methods, electrolysis belongs to a relatively ideal method with good treatment effect. Basically, it can reach the standards of safe, effective, economical and environment-friendly. The control circuit part design of ballast seawater treatment system based on electrolysis is finished in this paper. This system takes a MCU as its control core, synchronous circuit module...
Sliding mode control had been designed for robot manipulators at presents popularly, but the chattering is also a primary factor which infected the precise of the trace tracking of robot manipulators. This paper proposed a sliding mode control combined with a low-pass filter to deduce the influence by chattering and increase the precise of the trace tracking of robot manipulators. The stability and...
A new kind of salinity controller of seawater desalination is presented. The calibration and circuit of the sensor are mainly discussed. Circuit design mainly introduced the analog circuit. Parameter calibration introduced the application of binary algebra interpolation method. Finally an improved method for raising measure accuracy is put forward.
The capacity and feature of a large-sized low-voltage switchgear laboratory are presented in this paper. A monitoring and control system is designed for the laboratory with industrial PC as upper computer and PLC as lower computer. The testing process and programming philosophy of switchgear testing are discussed in detail. WinCC configuration software with a human-machine interface (HMI) is used...
Two or more vacuum interrupters in parallel is one mode to increase the rated current capacity of vacuum circuit breaker (VCB). Because of technique restriction, traditional method is that all vacuum interrupters get the open or close order and the short-circuit arc quenching moment of paralleled breaks is different. But because the arcing time of vacuum interrupters is different, the breaking capacity...
Accurate knowledge of the high frequency inductance profile plays an important role in many designs of sensorless controllers for surface inductance. A special algorithm is used to decouple the cross-coupling effects between the d-axis and the q-axis, which allows mounted permanent magnet (SMPM) synchronous motors. This paper presents an AC+DC measurement method for determination of the d-axis and...
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