Reference governors are applied to closed-loop tracking systems that are linear and discrete time and have constraints on state and control variables. Earlier results are extended in signi"cant ways. Disturbance inputs, whose values belong to a speci"ed set, are allowed and a general class of reference governors is introduced. Each governor in the class guarantees constraint satisfaction for al...

Centrifugal compressor and turbine manufacturers are building machines that operate at increasingly higher speeds to reduce the size and cost of their equipment. Helical gears are commonly used to step down the speed of these machines to match nominal motor and generator speeds. The demand for higher compressor and turbine speeds has resulted in an increase in the maximum pitch line velocities ...

The hydro turbine dynamics have a considerable influence on the dynamic stability of power system. In the study of dynamic stability, the system is modeled by the linear differential equations (small  signal analysis). Small signal stability of power systems is needed in all conditions and only is dependent on the conditions of power system performance before commotion occurrence. This paper pr...

It will liardly have surprised our readers to learn that the Lieutenant-Governor of Bengal has, on the earliest opportunity, substituted a civilian for a medical officer as superintendent of jails, Mr. Campbell, as is generally believed, entertaining no exaggerated notions regarding the value of the medical profession; however, it is useless to cry over spoilt milk, and on the present occasion ...

2nd Item The Governor of Goletta, member of the Board, having his residence in the same Goletta, will be charged with the fulfilment of all Quarantine measures taken for Tunisian and foreign war and merchant ships and he will be assisted, for this purpose, by Consular Agents residing in Goletta who will take the Title of Deputies of Public Health. The duties of the Governor of Goletta will be d...