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Stability Studies of Critical DC Power System Component for More Electric Aircraft using μ Sensitivity

Kuhn, Martin and Ji, Yang and Schröder, Dierk (2007) Stability Studies of Critical DC Power System Component for More Electric Aircraft using μ Sensitivity. In: 15 Mediterranean Conference on Control and Automation. MED 2007, 2007-06-27 - 2007-06-29, Athen (Greece).

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Abstract

In this paper an approach for stability analysis of power systems for "More Electric Aircraft" (MEA) using μ sensitivity is proposed. The application of the proposed appraoch is illustrated via a regulated buck converter as a typcial critical component in a power system. Due to the negative resistance at low frequencies the regulated buck converter could be unstable in combination with the input filter. A typcial regulated buck converter is first modelled in the simulation package Dymola. The model equations are transferred to Maple or Matlab with a Dymola toolbox and symbolically linearized at steady state conditions. For computing μ sensitivity it is necessary to get a Linear Fractional Representation (LFR) of the buck converter. This is done by using the enhanced LFR Toolbox 2.0. Finally, the μ sensitivity is computed with the Robust Control Toolbox 3.1.1 of Mathworks. Compared with other methods for small signal stability, e.g. Middlebrook criterion and Modal Analysis, the μ sensitivity approach gives a much more global and direct result for the influence of all components on stability.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Stability Studies of Critical DC Power System Component for More Electric Aircraft using μ Sensitivity
Authors:
AuthorsInstitution or Email of Authors
Kuhn, MartinUNSPECIFIED
Ji, YangUNSPECIFIED
Schröder, DierkTechnische Universität München
Date:2007
Journal or Publication Title:15 Mediterranean Conference on Control and Automation
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:More electric aircraft, LFR, stability
Event Title:MED 2007
Event Location:Athen (Greece)
Event Type:international Conference
Event Dates:2007-06-27 - 2007-06-29
Organizer:IEE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems & Cabin
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics > System Dynamics and Control (former Control Design Engineering)
Deposited By: Monika Klauer
Deposited On:22 Jul 2008
Last Modified:12 Dec 2013 20:31

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