Adaptive feedback linearizing control schemes are used to suppress limit cycle oscillations in nonlinear systems where the system parameters are either unknown or uncertain. Parameter convergence is desirable in these schemes as it provides a measure of robustness of the scheme and also permits the unknown/uncertain system parameters to be estimated. In recent work, we have shown how using a pe...

Observer based stochastic disturbance accommodating control scheme utilizes an estimator to determine the necessary corrections to the nominal control input and thus minimizes the adverse effects of both model uncertainties and external disturbances on the controlled system. The total control input, which includes the nominal control as well as the control corrections to the nominal control to ...

A simple yet realistic MOS model, namely the a-power law MOS model, is introduced to include the carrier velocity saturation effect, which becomes eminent in short-channel MOSFET’s. The model is an extension of Shockley’s square-law MOS model in the saturation region. Since the model is simple, it can be applied for handling MOSFET circuits analytically and can predict the circuit behavior in t...

Input constraints as well parametric uncertainties must be accounted for in the design of safe control systems. This paper presents an adaptive controller multiple-input-multiple-output (MIMO) plants with input magnitude and rate saturation presence uncertainties. A filter is introduced path to accommodate limits. An output feedback designed stabilize closed loop system even this filter. The ov...

the simultaneous flow of oil and water in porous media is described by relative permeability curves, mainly derived from laboratory experiments. relative permeability is of paramount importance in predicting reservoir production performance and drive mechanisms and its value depends largely on the volume fraction of fluids present in the test samples. nowadays x-ray scanners are one of the most...

This short note points out an improvement on the robust stability analysis for electrically driven robots given in the paper. In the paper, the author presents a FAT-based direct adaptive control scheme for electrically driven robots in presence of nonlinearities associated with actuator input constraints. However, he offers not suitable stability analysis for the closed-loop system. In other w...

A method is presented for the steady-state analysis of universal motors operating under direct or alternating voltage sources, and in the presence of saturation of the iron in the magnetic circuit. The saturation is modelled through a completely general functional dependence of the air-gap flux on the current, thus resulting in a unified treatment for various saturation models. It is shown that...

This paper studies the aperiodic sampled-data (SD) control anti-synchronization issue of chaotic nonlinear systems under effects input saturation. At first, to describe simultaneous existence SD pattern and saturation, a closed-loop system model is established. Then, make analysis, relaxed sampling-interval-dependent Lyapunov functional (RSIDLF) constructed for resulting system. Thereinto, posi...

In this paper, an adaptive neural command filtered backstepping scheme is proposed for the pneumatic active suspension with vertical displacement constraint of sprung mass and actuator saturation. A quarter car model a spring first fabricated on basis thermodynamic theory to describe dynamic characteristics. To overcome lumped unknown nonlinearities enhance requirement modeling precision, radia...