This paper considers the problem of adaptive output feedback tracking control for a class of nonstrict-feedback nonlinear systems with unknown time-varying delays and unknown backlash-like hysteresis. Fuzzy logic systems are used to estimate the unknown nonlinear functions. Based on the Lyapunov–Krasovskii method, the control scheme is constructed by using the backstepping and adaptive techniqu...

" r? Let X~= X and Y~= Y for t = 1, 2 . . . . . X, ,= ~ X ~ and !1, = Y~. Let S be any set, cg = {w(. 1" I s ) lseS} t = l t = l n be a set of (a x 2) stochastic matrices w( ' l ' ls) , and St=S , t= 1 . . . . . n. For every sn=(s 1 . . . . . s " ) e H S t n t = l define P (. ]" Is.) by P (y.[x.ls.) = I~ w (yt]x~lst) for every x. = (x a . . . . . x")~ X . and every y. = (yl, ... , y.)e 11.. t =...

• Delay sensitive multimedia applications are booming over a variety of time-varying networks (e.g. sensor networks, WiMax, Wireless LAN, etc.) • Existing dynamic distributed network environments cannot provide adequate support for delay-sensitive multimedia applications • This problem has been investigated for a decade, but we still do not have efficient solutions for it.

nowadays with increasing use of numerous nonlinear loads, voltage and current harmonics in power systems are one of the most important problems power engineers encounter. many of these nonlinear loads, because of their dynamic natures, inject time-varying harmonics into power system. common techniques applied for harmonics measurement and assessment such as fft have significant errors in presen...

removal of thiosulfate (s2o32-, 200 mg/l) from simulated wastewater samples was investigated under varying co-pollutants and ph conditions employing the titanium dioxide (tio2) mediated photocatalysis. for thiosulfate only studies higher substrate removal was noted at lower ph with a specific trend of ph 4 > ph 7 > ph 10. furthermore, near complete thiosulfate removal was also achieved at ph 4....

in this paper, the problem of decentralized model reference adaptive control (mrac) for a class of large scale systems with time varying delay in interconnected term and input and state delays is studied. to compensate the effect of input delay indirectly, a smith predictor built on. to handle the effects of the time delays in input, the adaptive controller part includes two auxiliary dynamic f...

This paper presents a new design for the event-triggered output feedback control of uncertain linear time-varying systems. Departing from traditional treatments time-invariant systems, it is shown that factoring fundamental solutions as products matrix differential equations, together with small-gain arguments and notions interval observers positive lead to class robust output-feedback controll...