in this paper, controlling the gyros with linear plus cubic damping is considered. hence, an adaptive control algorithm is proposed to overcome the uncertainties in model parameters and the chaotic behavior of gyroscopes. it is noted that for general applications dynamic model coefficient of gyros is not precisely determined, on the other hand, with respect to a particular coefficient gyroscope...

in this study, the roll, yaw and depth fuzzy control of an au- tonomous underwater vehicle (auv) are addressed. yaw and roll angles are regulated only using their errors and rates, but due to the complexity of depth dynamic channel, additional pitch rate quantity is used to improve the depth loop performance. the discussed auv has four aps at the rear of the vehicle as actuators. two rule bases...

this paper focuses on the non-fragile guaranteed cost control problem for a class of t-s fuzzy time-varying delay systems with local bilinear models. the objective is to design a non-fragile guaranteed cost state feedback controller via the parallel distributed compensation (pdc) approach such that the closed-loop system is delay-dependent asymptotically stable and the closed-loop performance i...

in this paper an adaptive pid controller for wind energy conversion systems (wecs) has been developed. theadaptation technique applied to this controller is based on reinforcement learning (rl) theory. nonlinearcharacteristics of wind variations as plant input, wind turbine structure and generator operational behaviordemand for high quality adaptive controller to ensure both robust stability an...

Abstract. Reference trajectory asymptotic tracking and disturbance rejection are an important field of control theory. In this paper, we are interested on the tracking of reference trajectories and the rejection of periodic disturbances with unknown frequency for multivariable systems. If the frequency is known, a classical solution is to use a multivariable repetitive generalized predictive co...

This paper focuses on the study of a solid/gas thermochemical reaction between a porous reactive bed and vapor. The objective is to determine the operating mode, either closed or open system, that best suits the requirements of a thermochemical seasonal storage applied to house heating. These two working modes have been compared thanks to two validated 2D models. This study shows that for the c...

This work aimed at investigating the performances of different discriminators used in a Delay Lock Loop (DLL) in a multipath environment. A filter based on rake receiver module is proposed to overcome the distorsions caused by reflected rays of the incoming signal. Experimental results confirm the effectiveness of the proposed method.

Performance evaluation has vital importance for businesses to maintain their activities effectively. An important part of performance evaluation is the performance measurement of employees. By measuring contribution of personal performance, people can see their individual contribution to the performance of the institution as a whole; they perceive their work and can enhance their performance by...

There is a growing body of research literature that considers how the mode of assessment, either computeror paper-based, might affect candidates’ performances (Paek, 2005). Despite this, there is a fairly narrow literature that shifts the focus of attention to those making assessment judgments and which considers issues of assessor consistency when dealing with extended textual answers in diffe...