AMB system for high-speed motors using automatic commissioning
Smirnov, Alexander (2012-12-18)
Väitöskirja
Smirnov, Alexander
18.12.2012
Lappeenranta University of Technology
Acta Universitatis Lappeenrantaensis
Julkaisun pysyvä osoite on
https://urn.fi/URN:ISBN:978-952-265-363-5
https://urn.fi/URN:ISBN:978-952-265-363-5
Tiivistelmä
The general trend towards increasing e ciency and energy density drives the industry to
high-speed technologies. Active Magnetic Bearings (AMBs) are one of the technologies
that allow contactless support of a rotating body. Theoretically, there are no limitations
on the rotational speed. The absence of friction, low maintenance cost, micrometer
precision, and programmable sti ness have made AMBs a viable choice for highdemanding
applications. Along with the advances in power electronics, such as
signi cantly improved reliability and cost, AMB systems have gained a wide adoption
in the industry.
The AMB system is a complex, open-loop unstable system with multiple inputs and
outputs. For normal operation, such a system requires a feedback control. To meet
the high demands for performance and robustness, model-based control techniques
should be applied. These techniques require an accurate plant model description and
uncertainty estimations. The advanced control methods require more e ort at the
commissioning stage.
In this work, a methodology is developed for an automatic commissioning of a subcritical,
rigid gas blower machine. The commissioning process includes open-loop tuning of separate parts such as sensors and actuators. The next step is to apply a
system identi cation procedure to obtain a model for the controller synthesis. Finally,
a robust model-based controller is synthesized and experimentally evaluated in the
full operating range of the system.
The commissioning procedure is developed by applying only the system components
available and a priori knowledge without any additional hardware. Thus, the work
provides an intelligent system with a self-diagnostics feature and an automatic commissioning.
high-speed technologies. Active Magnetic Bearings (AMBs) are one of the technologies
that allow contactless support of a rotating body. Theoretically, there are no limitations
on the rotational speed. The absence of friction, low maintenance cost, micrometer
precision, and programmable sti ness have made AMBs a viable choice for highdemanding
applications. Along with the advances in power electronics, such as
signi cantly improved reliability and cost, AMB systems have gained a wide adoption
in the industry.
The AMB system is a complex, open-loop unstable system with multiple inputs and
outputs. For normal operation, such a system requires a feedback control. To meet
the high demands for performance and robustness, model-based control techniques
should be applied. These techniques require an accurate plant model description and
uncertainty estimations. The advanced control methods require more e ort at the
commissioning stage.
In this work, a methodology is developed for an automatic commissioning of a subcritical,
rigid gas blower machine. The commissioning process includes open-loop tuning of separate parts such as sensors and actuators. The next step is to apply a
system identi cation procedure to obtain a model for the controller synthesis. Finally,
a robust model-based controller is synthesized and experimentally evaluated in the
full operating range of the system.
The commissioning procedure is developed by applying only the system components
available and a priori knowledge without any additional hardware. Thus, the work
provides an intelligent system with a self-diagnostics feature and an automatic commissioning.
Kokoelmat
- Väitöskirjat [1037]