A flux observer for induction motors which is adaptive to the active rotor resistance variations presented. Due added fluxes overestimation in structure, global exponential stability properties of current and vector components estimation are ensured under conditions persistency excitation. The proposed has a simpler structure compared existing solutions with properties. simulation results dynam...

In this note we consider a class of second order distributed parameter systems with structured perturbations ζ̈(t)+D ζ̇(t)+K ζ(t) = Bu+B f1(yp)+B f2(yv) and with partial position and velocity measurements: yp(t) = Cpζ(t), yv(t) = Cvζ̇(t). It is desired to design a controller so that the plant follows the reference model ζ̈m +Dmζ̇m(t)+Kmζm(t) = Br(t). The proposed model reference adaptive controller ...

This paper presents an adaptive differentiator of sequential data based on the adaptive control theory. The algorithm is applied to detect moving objects by estimating a temporal gradient of sequential data at a specified pixel. We adopt two nonlinear intensity functions to reduce the influence of noises. The derivatives of the nonlinear intensity functions are estimated by an adaptive observer...

Kalman filter is an optimal filtering solution in certain cases, however, it is more often than not, regarded as a non-robust filter. The slight mismatch in noise statistics or process model may lead to large performance deterioration and the loss of optimality. This research paper proposes an alternative method for robust adaptive filtering concerning lack of information of noise statistics. T...

This study presents a control design of an angular position for the exoskeleton knee assistance system based on model reference adaptive (MRAC) strategy. Three schemes MRAC have been proposed: classical MRAC, with disturbance observer, and nonlinear observer. The stability analysis each scheme has conducted developed Lyapunov theorem to prove uniform ultimate bound tracking estimation errors. I...

In this paper, we investigate the visual tracking problem for robotic systems without image-space velocity measurement, simultaneously taking into account the uncertainties of the camera model and the manipulator kinematics and dynamics. We propose a new image-space observer that exploits the image-space velocity information contained in the unknown kinematics, upon which, we design an adaptive...