Two controllers which extend the PD+I fuzzy logic controller to deal with the plant having time varying nonlinear dynamics are proposed. The adaptation ability of the first self tuning PD+I fuzzy logic controller (STPD+I_31) is achieved by adjusting the output scaling factor automatically thereby contributing to significant improvement in performance. Second controller (STPD+I_9) is the simplif...

In this paper, precise control of the end‐point position of a planar single‐link elastic manipulator robot is discussed. The Timoshenko beam theory (TBT) has been used to characterize the structural link elasticity including important damping mechanisms. A suitable nonlinear model is derived based on the Lagrangian assumed modes method. Elastic link manipulato...

Active magnetic bearings are increasingly being utilized in rotating machinery applications as an alternative to the conventional rolling-element and fluid-film bearing types. In this paper three control schemes for a large air-gap magnetic bearing system are described. In the large air-gap situation, the magnetic bearing system operates in highly nonlinear regimes .The non-linearity in this sy...

Many systems in reality exhibit nonlinear characteristics and in most cases they cannot be treated satisfactorily using linearized approaches over the full operating range. In this paper, an approximate modeling approach is introduced to overcome the mismatch between the linear/linearized model and the real nonlinear plant by treating the nonlinear system as a linear uncertain system that consi...

This paper presents a decentralized control problem for stabilizing the nonlinear large-scale descriptor (LSD) systems that use proportional-plus-derivative state (PD) feedback scheme. The have great focus on research because they can contain more physical characteristics than standard state-space systems. At first, each subsystem in LSD system be represented by Takagi-Sugeno (T-S) with interco...

A visual information feedback mechanism for group decision making (GDM) problems with triangular fuzzy complementary preference relations (TFCPRs) is investigated. The concepts of similarity degree (SD) between two experts as well as the proximity degree (PD) between an expert and the rest of experts in the group are developed for TFCPRs. The consensus level (CL) is defined by combining SD and ...

A novel approach to the detection of multiple sclerosis (MS) lesions in T2and PD-weighted MR images is presented. The core of the proposed method is the use of the two channels fuzzy cmeans (FCM) segmentation of data, where the classical FCM approach runs, at first, on the two separate spectra. Then, the onedimensional distributions of the clusters centers obtained by FCM, are composed in the t...

In this paper, hierarchical control of an UAV (unmanned aerial vehicle) is proposed. The proposed controller is made up of two sub-systems, namely inner-loop controller and outer-loop controller. The inner-loop controller is an attitude control system while the outer-loop control system is a trajectory control system. In the proposed architecture, a DFNN-(dynamic-fuzzy-neural-network-) based re...

Continuous innovation intended to deliver products with new attributes is an imperative driver for organizations to remain competitive in today’s fast changing market. A successful innovation is often associated with adoption and execution of all SECI (socialization-externalization-combinationinternalization) modes of knowledge creation within any Product Development (PD) phase. This article is...