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In this paper, a robust proportional-integral-derivative (PID) feedback compensator is designed for a low power radio-frequency (RF) amplifier, using Kharitonov's theorem. The robust D-stability concept is used to achieve robust performance by clustering the characteristic polynomial equation roots of the closed loop system in a specified angular region. Then, the controller is realized and the obtained...
For several decades, the output from semiconductor manufacturers has been high volume products with process optimisation being continued throughout the lifetime of the product to ensure a satisfactory yield. However, product lifetimes are continually shrinking to keep pace with market demands. Furthermore there is an increase in dasiafoundrypsila business where product volumes are low; consequently...
A bound on allowable weighted additive perturbation in the coefficients of a 2-D stable digital filter from their respective nominal values is determined so that the strict stability of the perturbed-coefficient filter is maintained.
In this paper we present the generalization of two recent frequency-domain methods for evaluating robust stability of uncertain systems to the complex polynomial case. Both methods are based on Mikhailov criteria and have been established recently for real continuous-time systems. Besides generalization to the complex case, we relate these two methods for both real and complex cases, make an objective...
Positive-realness of interval functions are studied, and both necessary and sufficient conditions are provided for such functions to be Strictly-Positive-Real (SPR), in the presence of interval variations of the function's parameters corresponding to a Kharitonov-type box domain. SPR interval functions play an important role in the stability of adaptive control systems, 2-dimensional systems, and...
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