In this paper, the amplitude and variance-constrained LQG control is considered for a plant given by discretetime ARMAX model. The minimization of constrained quadratic cost is approached by Kalman filter, approximation of the probability density function (pdf) of the state by the Gaussian one and by by tuning of the Lagrange multiplier. The obtained optimization algorithm is simulated for seco...

This paper applies the proportional-integral (PI) observer in connection with LQG and LQG/LTR design for discrete time systems. Both the prediction and the filtering versions of the PI observer are considered. We show that a PI observer makes it possible to obtain time recovery, i.e., exact recovery for t → ∞, under mild conditions. It is shown that LQG/LTR design is a special case of the cheap...

Design of power system stabilizer using Linear Quadratic Regulator (LQR) technique. Designs that ignore noise in a plant are likely to fail when implemented in actual conditions. Presence of the noise, which results in LQR output oscillating with very small magnitude. This type of unwanted noisy output is eliminated using Linear Quadratic Gaussian (LQG) Regulator. This paper presents techniques...

This article presents an “in-a-nutshell” yet self-contained introductory review on loop quantum gravity (LQG)—a background-independent, nonperturbative approach to a consistent quantum theory of gravity. Instead of rigorous and systematic derivations, it aims to provide a general picture of LQG, placing emphasis on the fundamental ideas and their significance. The canonical formulation of LQG, ...

This paper focuses on a critical component of the situational awareness (SA), the control of autonomous vertical flight for vectored thrust aerial vehicle (VTAV). With the SA strategy, we proposed a linear-quadratic-Gaussian (LQG) flight control procedure for an unmanned helicopter model with vectored thrust configuration. This LQG control for chosen model of VTAV has been verified by simulatio...

In this paper we present experimental results of several control algorithms for a non-holononmic underactuated 2-DOF robot. The rst joint of the robot consists of a DD-motor whereas the second joint has no actuator but a holding break. We derive a control law using non-collocated linearization for the uncertain parameter case and apply a PD, LQG and VS controller. In experiments the di erent co...

The Clowes & Campusano large quasar group (LQG) at z̄ = 1.28 has been re-examined using the quasar data from the DR7QSO catalogue of the Sloan Digital Sky Survey. In the 1991 discovery, the LQG impinged on the northern, southern and eastern limits of the survey. In the DR7QSO data, the western, northern and southern boundaries of the LQG remain essentially the same, but an extension eastwards of...

The paper considers a discrete-time linear quadratic Gaussian model with constrained control. It is formulated with Markov systems. With the derivative equation, a performance gradient with respect to control parameters is estimated from a sample path. Then a learning algorithm is proposed to obtain a suboptimal feedback policy in affine linear form. The learning algorithm can be implemented on...