A new methodology for aircraft HVDC power systems design

Abstract

-A new methodology for aircraft HVDC power systems design is first proposed. The first goal is to design the network subsystems in order to obtain optimal devices from a weight point of view. The contribution of optimal linear multivariable control methods is shown to be major for this first design objective and H 8 synthesis is applied in this paper. The second design objective is that the devices exhibit an adequate dynamical behavior when integrated into the DC network. But during design phases, the aircraft subsystems providers generally do not know the parameters of the DC network. To guarantee an easy integration of the subsystems, the device design should be robust to DC network uncertainties. Robust performance analysis method is applied in this paper and is integrated in the proposed methodology.

A Mixed Function for Actuation and Power Flow Control in Embedded Networks

“…A three-phase AC machine being part of the MAPFC, it is relatively common to use a Park's decomposition in order to study the system [7]. The equation set (1) presents the voltage equations of the PMSM in a Park's reference frame (dqh) related to the rotor [8], the d-axis being associated with the magnetic field of the magnet. Equation (2) gives the different flux expressions in this frame…”

“…Regarding the electromechanical torque Γ m of a PMSM machine with no saliency as expressed in (8), the homopolar axis does not have any impact on the torque. Thus, both functions (actuation and power flow control) can be seen as decoupled…”