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This paper describes one drawback in the Internet recommendation RFC2833 biscas. The recommendation deals with the method of telephone signalling sending over Internet network and the problem existed in the case of line R2 signalling sending when E1 transmission system is used in classic telephone network. The authors of the recommendation accepted our suggestion and changed the text of the recommendation...
A new class of the almost orthogonal filters is defined in this paper. These filters are a generalization of the classical orthogonal filters commonly used in the circuit theory, control system theory, signal processing, and process identification. Almost orthogonal filters generate the series of almost orthogonal Legendre functions on the interval (0, ??). It's a well known fact that every real system...
This paper deals with the design of digital fuzzy sliding mode control where only the plant output is used for the realization of control algorithm. The suggested concept is based on minimum variance control approach with disturbance estimator. The additional filtration of nonlinear, fuzzy, control component is performed by using the digital integrator. The higher accuracy in steady-state is also...
Sampled-data (SD) variable structure control systems (VSCS) with quasi-sliding mode (QSM) are treated in this paper as a logical extension of VSCS with ideal sliding mode (SM). The most of well-known SD QSM control algorithms are derived by starting from reaching law approach. The problems of robustness to uncertainties, loads and unmodeled inertial dynamics are considered and some methods to solve...
The paper deals with the design of digital sliding mode controllers using only input and output sequences of plant. Two approaches are considered. The first one is based on the sliding mode based generalized minimum variance control implemented on the linearized plant model, whereas the second one utilizes the similar idea from the previous method modified for and applied on the discrete-time nonlinear...
This paper considers the design of robust servo system for accurate tracking of complex referent signals in the presence of internal and external disturbances. Discrete-time sliding mode tracking controller is employed in servo-system design. In order to improve tracking accuracy, application of active disturbance estimator is suggested. The same sliding mode controller, designed for reference tracking...
In high-speed CMOS clock buffer design, the duty cycle of a clock is liable to be changed when the clock passes through a multistage buffer (Fenghao and Svensson, 2000). In this paper, we propose a pulsewidth control loop referred as APWCL (adaptive pulsewidth control loop) that adopts the same architecture as the conventional PWCL, but with two modifications. The first one relates to implementation...
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