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The feedback control system with actuator, which has different slew rates during the rise and fall of output parameter, has been analyzed. The controller for control of such a nonlinear control system is proposed. It takes into account the peculiarity of the system, which is introduced by the actuator, and allows us to achieve good control quality. The controller is developed for the control systems...
The aim of this paper is the application of Fractional Order Control (FOC) to the control of a Buck converter. This work deals with the design of a linear controller for a DC-DC Buck power converter. In order to achieve this goal, several design methods are proposed and experimentally validated. Bode's ideal function will be used as reference system in all of them. The employ of this design technique...
According to the work characteristics of the electromechanical actuator, a control scheme of direct DC electromechanical actuator based on discrete-time variable structure controller is designed. The effect of hinge moment is considered in the mathematical model, and the coefficients of its transfer function are appropriately amended. The effect of the three parameters in the design of discrete-time...
The problem of reliability in high performance control and in fault tolerant control is considered in this paper. A feedback controller architecture for high performance and fault tolerance is considered. The architecture is based on the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization. By using the nominal controller in the architecture as a simple and robust controller, it is possible to use...
A new set-up for fault tolerant control (FTC) for stable systems is presented in this paper. The new set-up is based on a simple implementation of the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization. This implementation of the YJBK parameterization will allow a direct and simple re-configuration of the feedback controller. Another central part of fault tolerant control is fault diagnosis. The...
Fixed speed actuators have a characteristic nonlinear transient response. While this may not present a problem for single-input, single-output (SISO) control systems containing such actuators, the mixture of different fixed speed actuators is usually problematic in multivariable control applications. This paper presents two methods which allow such nonlinear actuators to present a linear response...
This paper investigate different controller architectures in connection with controller switching. The controller switching is derived by using the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization. A number of different architectures for the implementation of the YJBK parameterization are described and applied in connection with controller switching. An architecture that does not include inversion...
The control problem of the system with the switched actuator rate limitation is analyzed. The controller for plants, which include the actuator with the switched rate limitation, has been suggested. It is based on the algorithm, which differs from the conventional PI controller algorithm in the fact that the integral constant has different values during the plant output parameter rise and fall. The...
A new principle of a DC-DC converter with a magnetic coupled coil is analyzed. The speciality of this converter is that it transforms a unipolar input voltage into two symmetrical bidirectional DC voltages with only one power switch. The value of the output voltage can be varied by the duty cycle of the switch. The generation of two symmetrical voltages, one positive and one negative related to ground,...
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