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In this work we present a design and implementation method of discrete variable gain controllers, which are used for regulating industrial systems. The design is derived from the classical discrete deadbeat response approach. The design is based simply on determining a variable gain for each discrete sample such to accomplish the regulation in finite steps equal the system order. The gain computation...
Centrifugal pumps are considered as one of the most common types of pumps in industry today. They are widely-used because their design is simple, they are available in wide range of capacity and head, they have high efficiency and smooth flow rate, and they are easy to operate and maintained. There are many factors that contribute to the efficiency and life time of centrifugal pumps. In this work,...
A control system that includes a network in a feedback loop often becomes unstable, owing to a time delay in the network. Synchronous time-division multiple access (STDMA) is a dynamic routing protocol that achieves low-delay time communication. STDMA is expected to be a potential candidate in the design of a feedback control system over a network. Therefore, this paper analyzes stability and performance...
Most of the modern industries have multivariable processes wherein interactions exist. As the process outputs and inputs are coupled, designing controller for MIMO processes is a challenging task. The effective open-loop transfer functions (EOTFs) between the paired process input-output variables have complex high order dynamics. While many of the decoupling control methods uses effective transfer...
Permanent Magnet Synchronous Motor(PMSM) frame vibrations can represent significant noise problems. In this paper, a novel position sensorless anti-vibration system for PMSM-driven applications is proposed, which is called Specific Component Reduction Controller(SCRC). This controller is derived from repetitive controller with Fourier Transform (FT) (conventional one). Since the repetitive controller...
An attempt is made to design the centralized controller based on the inverted decoupling structure (CCID) for non-square (nxm) processes with multiple time delays. To avoid the Moore-Penrose pseudo-inverse of the nominal plant with multiple time delays and Maclaurin series approximation, a centralized controller is decomposed into two components using inverted decoupling structure. The two components...
Goal attainment method is used to design (i) decentralized PI controllers for a 3×3 stable multivariable transfer function matrix and (ii) decentralized and centralized PI controllers for an unstable 2×2 transfer function matrix. The performance of the closed loop system of 3×3 stable multivariable system is compared with that of the biggest log modulus (BLT) method, sequential tuning method, and...
The main of this project is to control the TITO system (Quadruple tank process). For better control to achieve modeling of quadruple tank is required. The modeling is obtained by linearization technique and Jacobian matrix. The designing of controller is a challenging task. The system response is achieved using Decentralized PI (Proportional Integral) controller. The system response for two control...
This paper proposes a modified quadratic boost converter with high efficiency and reduced cost. This converter mainly comprises of the quadratic part. The newly proposed converter in this paper is compared with a quasi z source converter which is a quadratic boost converter. The current ripples, cost, efficiency, losses and the complexity of the converters are considered. The steady state analysis...
This paper presents a new way to analyze performance between integer order and fractional order controller with a time delay for a typical interacting coupled tank system using MATLAB FOMCON toolbox. Here, our work aims to analyze the performance characteristics of integer order and fractional order PID controller on the current integer order plant obtaining minimum objective function by Nelder —...
The paper presents a PWM control system of a sinusoidal voltage as output of a single-phase inverter with resistive load and LC low-pass filter. First the PWM control for a sinusoidal voltage and the control loop optimization via modulus criterion for step input signal are discussed, further analyzing the stationary error for a sinusoidal signal. This error can be reduced to zero by introducing a...
In this paper, we investigate the correlation between optimal set of driver nodes and networked sensitivity of Complex Networked Systems (CNS). Here, we study the networked sensitivity between a pair of control and output nodes for interconnected directed and undirected networks. We investigate the importance of the optimal driver nodes based on new index of the networked control system, which is...
PID is most widely used in industrial process control. Voltage Differencing Transconductance Amplifier (VDTA) which is recently more popular in analog signal processing applications is discussed and integrated a proportional-integral-derivative (PID) controller. The proposed controller needs minimum number of active and passive components and demonstrates independent/electronic tuning of control parameters...
Through this article, we will focus on the most common problem in the internal model control for multivariable systems with multiple time delays, that is the reversal of the corrector. This problem seems to be quite annoying when we face a non-square system. Our ultimate work developed through this paper, will be concentrated on a specific work structures to overcome the mean difference between the...
Using parametric model, this paper presents a design procedure for STATCOM proportional-integral (PI) voltage controller for enhancing the voltage profile of the multimachine system under dynamic disturbances. The proposed design scheme constantly updates the PI controller thus preventing it to integrate or to saturate to a higher value under the condition of uncertainty faced by the controller arising...
In SDP-based H∞ control, we often encounter numerical difficulties when solving SDPs by various pieces of software. It is empirically known that such numerical difficulty occurs if an SDP at hand or its dual has no interior point feasible solutions, and this is indeed the case of some SDPs in H∞ control. To conceive a way for getting around such numerical difficulties in a concrete problem setting,...
Efficient and robust control of cardiac pacemaker is essential for providing life-saving control action to regulate Heart Rate (HR) in a dynamic environment. Several controller designs involving proportional-integral-derivative (PID) and fuzzy logic controllers (FLC) have been reported but each have their limitations to face the dynamic challenge of regulating HR. Fractional-order control (FOC) systems...
This paper proposes strategies for regulating the grid current of a three-phase inverter connected to an electrical network through a LCL filter interfaced by a PV system. The focus of the analysis is to investigate the use of a PI controller or PR controller to regulate the grid current in the outer loop, when there is inner capacitor current regulating loop already provided in order to stabilise...
In recent years, wind energy has proven to be the most competitive and environmental friendliest renewable energy (RE) source for generating electricity. Wind farms are more likely to be located far from the load centres, and hence the generated power has to be transmitted over long distances. A high voltage direct current (HVDC) transmission system increases the transmission capacity, improves the...
This article considers the problem of constructing an adaptive control system for nonlinear priori uncertain dynamic object with statement delay and relative order greater than one. As methods of solving the hyperstability criterion and high-speed self-tuning correction unit are used.
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