Model predictive controller is widely used in industrial plants. Uncertainty is one of the critical issues in real systems. In this paper, the direct adaptive Simplified Model Predictive Control (SMPC) is proposed for unknown or time varying plants with uncertainties. By estimating the plant step response in each sample, the controller is designed and the controller coefficients are directly ca...

In the present work, the frequency and quality factor (Q) variation of an evanescent-mode cavity resonator are predicted using analytical expressions, which give design variables for these structures. Two widely tunable narrowband evanescent-mode bandpass filters having 2.5% and 0.58% bandwidths are demonstrated, tuning from 2.7 to 4 GHz and 3 to 6 GHz respectively. A low loss Rogers Duroid® fl...

A mathematical model of a voltage source converter is presented in the synchronous reference frame for investigating VSC-HVDC for transferring wind power through a long distance. This model is used to analyze voltage and current control loops for the VSC and study their dynamics. Vector control is used for decoupled control of active and reactive power and the transfer functions are derived for...

We study the behaviour of the Ben-Yishai hypercolumn model (Ben-Yishai et al., Proc. Natl. Acad. Sci. USA 92 (1995) 3844) under presentation of oriented stimuli, having extended this model by including plastic a!erent (LGN to cortex) connections. We "nd that Hebbian plasticity creates a self-organising map and show that constraining or modifying the standard Hebb rule in a particular way will l...

We report on an analytical model which describes the bipolar resistive switching in electrochemical metallization cells. To simulate the resistive switching, we modeled the growth and dissolution of a metallic filament together with electron tunneling between the growing filament and the counter electrode. The model accounts for the controllability of the low resistive state and the RESET curre...

Abstract We derive general analytical expressions for matching the complex impedance of feeding radio frequency (RF) circuit to a twin junction device in Superconductor-Insulator-Superconductor (SIS) mixers. A unique feature our analysis is that it allows junctions different admittance and an RF with admittance. This provides important design flexibility accommodates fabrication tolerances. the...

This brief paper proposes a method for tuning the parameters of a variable structure controller. The approach presented extracts the error at the output of the controller and applies a nonlinear tuning law using this error measure. The adaptation mechanism drives the state tracking error vector to the sliding hypersurface and maintains the sliding mode. In the simulations, the approach presente...

In this paper, a new tuning procedure for PI controllers in Two-Degree-of-Freedom (2DOF) structure is proposed. In design procedure, First Order plus Dead Time (FOPDT) model is used. The aim is to have good set point tracking and disturbance rejection and also maximum robustness to model uncertainties. The tuning strategy is based on using analytical rules and some conceptual rules about closed...

Correlation functions (CFs) associated with the inverse background-error correlations (iBECs) represented by polynomials of the diffusion operator D are obtained analytically for the binomial approximations of the Gaussian BEC and in the general case of a quadratic polynomial of D. The respective analytical expressions for one-, twoand three-dimensional cases have two tuning parameters, which p...

A mathematical model of a process to be controlled can be used for off-line tuning and testing of control systems for the process. The tuning and testing can be performed using analytical methods or using simulations. The benefit of simulations in this respect is that it is straight-forward to include non-linearities in the model. This presentation demonstrates the application of commercially a...