In a Single Inductor Double Output (SIDO) boost converter, power is fed to both the outputs through the same inductor and hence the control requirements on output voltages are inter-dependent, causing complexity in mo...
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ISBN:
(纸本)1424404487
In a Single Inductor Double Output (SIDO) boost converter, power is fed to both the outputs through the same inductor and hence the control requirements on output voltages are inter-dependent, causing complexity in modeling and control design of such converters. But, there is some flexibility in disguise due to the increased number of controlled devices and storage elements. This is utilized in this paper, to arrive at different hybrid automaton models for representing the SIDO boost converter. The features of each representation are highlighted. For these models, a safe spherical region around the required set point is identified using the stability requirements for a given set of disturbances. Inside the safe region, hybrid control laws are proposed to regulate the two different outputs at their required levels. Simulation studies are carried out in MATLAB/SIMULINK and the results are presented. The response of the SIDO converter, under various disturbances, is found to be satisfactory under the proposed control scheme.
A hybrid global optimization technique for identifying an output-error fractional order model is proposed. The proposed technique combines local and interval global optimization methods. It is capable of estimating th...
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ISBN:
(纸本)9783902661104
A hybrid global optimization technique for identifying an output-error fractional order model is proposed. The proposed technique combines local and interval global optimization methods. It is capable of estimating the fractiona derivative orders and the parameters, with guaranteed convergence. The technique is applied to identify a fraction alorder model for a twin-spool aerogas turbine plant. The input variable is the fuel rate to the gas turbine and the output variable is the high pressure (HP) spool speed. The operating regime is at 9 0 % HP spool speed demand. It is found that the fraction alorder model identified with the proposed technique gives a much better fit to the temporal data than higher in teger order models.
We propose to use a fractional order integrator (1/sα, α Ε +) for simplifying the loop shaping in Quantitative Feedback Theory (QFT). The controller thus obtained is approximated to integer order in frequency domai...
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ISBN:
(纸本)9783902661128
We propose to use a fractional order integrator (1/sα, α Ε +) for simplifying the loop shaping in Quantitative Feedback Theory (QFT). The controller thus obtained is approximated to integer order in frequency domain by using Oustaloup's recursive approximation. The designed controller along with the prefilter is implemented real-time on a coupled-tank system and the experimental results are found to be satisfactory.
In this paper, the design of sensorless induction motor speed controller using the concept of multirate output feedback discrete-time sliding mode control technique is proposed. The nonlinear model of the motor is lin...
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In this paper, the design of sensorless induction motor speed controller using the concept of multirate output feedback discrete-time sliding mode control technique is proposed. The nonlinear model of the motor is linearized at its operating point and the multirate output feedback discrete time sliding mode control using output samples is designed and the same is applied to nonlinear model of the motor at its operating (equilibrium) point. This method docs not require the complete states of the system for feedback and is easily implementable.
In a single inductor double output (SIDO) boost converter, power is fed to both the outputs through the same inductor and hence the control requirements on output voltages are inter-dependent, causing complexity in mo...
详细信息
In a single inductor double output (SIDO) boost converter, power is fed to both the outputs through the same inductor and hence the control requirements on output voltages are inter-dependent, causing complexity in modeling and control design of such converters. But, there is some flexibility in disguise due to the increased number of controlled devices and storage elements. This is utilized in this paper, to arrive at different hybrid automaton models for representing the SIDO boost converter. The features of each representation are highlighted. For these models, a safe spherical region around the required set point is identified using the stability requirements for a given set of disturbances. Inside the safe region, hybrid control laws are proposed to regulate the two different outputs at their required levels. Simulation studies are carried out in MATLAB/SIMULINK and the results are presented. The response of the SIDO converter, under various disturbances, is found to be satisfactory under the proposed control scheme
The paper presents a novel method to design a spatial control for a large PHWR based on multirate output feedback robust sliding mode control. The proposed method does not require state information of the system, for ...
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ISBN:
(纸本)1424407265
The paper presents a novel method to design a spatial control for a large PHWR based on multirate output feedback robust sliding mode control. The proposed method does not require state information of the system, for feedback purposes. The proposed control technique is easy to obtain and to implement. Simulation has been carried out using the nodal core model of PHWR to show the effectiveness of the proposed method.
The paper presents an approach for achieving second order sliding mode in continuous-time systems. The existing methods of second order sliding mode control are based on relay control in the derivative of the input. S...
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The paper presents an approach for achieving second order sliding mode in continuous-time systems. The existing methods of second order sliding mode control are based on relay control in the derivative of the input. Such a control, though continuous, is not smooth in close proximity of the sliding surface. The proposed control algorithm achieves second order sliding mode by using a smooth control signal which avoids the use of a relay in the control.
We present an algorithm to characterize the set S = {x epsi Rfr l : f(x) > 0} = f -1 (]0,infin[ m ) in the framework of set inversion using interval analysis. The proposed algorithm improves on the algorithm of Ja...
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We present an algorithm to characterize the set S = {x epsi Rfr l : f(x) > 0} = f -1 (]0,infin[ m ) in the framework of set inversion using interval analysis. The proposed algorithm improves on the algorithm of Jaulin et. al. The improvement exploits powerful Hansen's method for solving systems of nonlinear inequalities. We test and compare the performance of the proposed and existing algorithms in characterizing the domain for the robust stability. The results of the testing show that the proposed algorithm is computationally efficient and encloses the solution more sharply than the existing algorithm, requires less memory space and iterations.
A hybrid global optimization technique for identifying an output-error fractional order model is proposed. The proposed technique combines local and interval global optimization methods. It is capable of estimating th...
详细信息
A hybrid global optimization technique for identifying an output-error fractional order model is proposed. The proposed technique combines local and interval global optimization methods. It is capable of estimating the fractional derivative orders and the parameters, with guaranteed convergence. The technique is applied to identify a fractional order model for a twin-spool aero gas turbine plant. The input variable is the fuel rate to the gas turbine and the output variable is the high pressure (HP) spool speed. The operating regime is at 90% HP spool speed demand. It is found that the fractional order model identified with the proposed technique gives a much better fit to the temporal data than higher integer order models.
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