A globally exponentially stable (GES) observer for the mass flow in a compression system is proposed. Further, a previously proposed active surge control scheme is shown to be GES. This nonlinear control scheme employs the drive torque of the compressors drive unit as the control variable in an active surge control system. The controler is based on feedback from mass flow. It is desireable to a...

A brief review of current approaches to active feedback control of the fluctuations arising in turbulent flows is presented, emphasizing the mathematical techniques involved. Active feedback control schemes are categorized and compared by examining the extent to which they are based on the governing flow equations. These schemes are broken down into the following categories: adaptive schemes, s...

This paper presents a phase-shift control method for converter containing multi-winding transformer. The strategy is developed from power flow analysis of the and uses derived equations to supply constant at load port while second experiences large changes. prevents experiencing transient behavior caused by magnetic coupling with other port. approach demonstrated an experiment using controller ...

The desired changes in flow characteristics are obtained by control, which implies manipulating behavior such as drag reduction, mixing augmentation, or noise attenuation, employing active passive devices [...]