This paper presents the comparison of tracking control performance of fuzzy PI Controller with fuzzy PID and conventional PID controllers. Fuzzy PI controller and Fuzzy PID controller composes of Mamdani type fuzzy controllers and parameters are adjusted to meet the desired control system performances both in transient state and steady state. Computer simulations are done for controlling the time delay, Nonlinear, and Linear systems by using fuzzy PI, fuzzy PID and the conventional PID controller are shown in this paper. The effectiveness of fuzzy controllers over the conventional controller are shown by choosing Gaussian, triangular, pi input fuzzy sets.
A gramian based digital controller design is proposed for a two-input DC-DC converter suitable to draw power from two different dc sources feeding a common dc-bus is presented in this paper. The proposed converter is simple and it belongs to sixth-order family performing bucking as well as boosting features. The salient features of this converter are that both the sources either individually or simultaneously supply power to the downstream load at reduced ripple current. Although this will be performing the load management, there is considerable interaction among the control loops. The issue of control-loops interaction is investigated in this paper by applying gramian based control theory. A digital voltage-mode controller is designed for downstream dc-bus regulation while the current controller regulates the power from the weak input power source. A 24 V, 96 Watt converter performance is analyzed and compared with the experimental observations. keywords: Two input dc-dc converter, Gramian, Multi-input Converter, Synchronized trailing-edge switching.
A centralized digital controller design methodology is proposed for a two-input DC-DC converter. An hankel-norm based interaction analysis is developed to quantify the interaction of the controlling input and outputs of the proposed two-input dc-dc converter. The proposed converter is capable of feeding power to the common load either individually drawing from any one source or simultaneously drawing from both the sources. The load division on the two-input source is demonstrated through a two-loop control strategy. A digital current controller ensures load division in the input sources while the bus voltage regulation is achieved through a singleloop voltage-mode controller. A 24 V, 60 Watt converter performance is analyzed and compared with the experimental observations. keywords: Centralized controller, Digital controller, Hankel-norm based interaction analysis, Two-input integrated converter.
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