If all concrete is to be recycled in a future scenario, will needed. Usually recycling causes loss of properties, but this does not have truth for the mixtures. This paper shows comprehensive knowledge about improving methods used keep properties aggregate (RAC). In reviewed literature several kinds RAC were tested with various replacement ratios. The effect adding steel fibres, silica fume or ...

Recently, an alternative to achieve a robust controller that provides a straightforward and intuitive design and tuning of its parameters named Indirect Variable Structure Model Reference Adaptive Controller (IVS-MRAC) was presented for relative degree one LTI plants, suggesting to be globally asymptotically stable with superior transient behavior and disturbance rejection properties. Its novel...

This paper addresses the issue of position control of a chain of multiple massspring-damper (CMMSD) units which can be found in many physical systems. The dynamic model of a CMMSD system with any degrees of freedom is expressed in a closed-form for the convenience of the controller design. Backstepping and model reference adaptive control (MRAC) approaches are then used to develop two adaptive ...

This paper presents a direct neural-fuzzy-based Model Reference Adaptive Controller (MRAC) for nonlinear dynamical systems with unknown parameters. The two-phase learning is implemented to perform structure identification and parameter estimation for the controller. In the first phase, similarity index-based fuzzy c-means clustering technique extracts the fuzzy rules in the premise part for the...

Adaptive control-based schemes have been implemented to date in a variety of different applications. However, the ability to obtain a predictable transient closed-loop performance in adaptive systems is still a challenging problem from a verification and validation point of view. To face this problem we have recently introduced an analysis and design framework for adaptive control systems in th...

When the direct model reference adaptive control (MRAC) scheme with first-order local estimators is employed to design totally decentralized controllers, the stability result can only be applied to a system with all of its nominal subsystem relative degrees less than or equal to two. In this paper, this restriction is relaxed and it is achieved by employing the parameter projection together wit...

This paper presents a Direct Model Reference Adaptive Control (MRAC) for nonlinear time-varying system. A mechanism adaptation algorithm is proposed. This corresponding algorithm depends on the error between the actual plant output and the output of the reference model, and also is depending on variable learning rate. The control strategy is based on two-steps; the first is initialization param...