Active drive control of electric vehicles using a modal state observer

Gotting, Gunther; Doncker, Rik W. De

doi:10.1109/pesc.2004.1354810

Cited by 15 publications

(9 citation statements)

References 3 publications

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“…Für die aktive Dämpfung dieser Schwingungen existieren verschiedene Ansätze. In [1,8,12,15,19,24] werden entsprechende Algorithmen betrachtet und durch Simulation sowie am Prüfstand untersucht. Die Schwingungsdämpfung erfolgt jeweils mittels Modulation des Solldrehmoments der Antriebsmaschine auf Basis der Differenz von Rotorwinkelgeschwindigkeit der Antriebsmaschine und äquivalenter Fahrzeugwinkelgeschwindigkeit.…”

Section: Introductionunclassified

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Untersuchung und Optimierung des Einflusses von niedrig auflösenden Rotorlagegebern auf die Fahrbarkeitsfunktionen elektrifizierter Fahrzeugantriebssysteme mittels eines Hardware-in-the-Loop-Prüfstands

Koch

Schulz

Jakstas

et al. 2020

Forsch Ingenieurwes

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Zusammenfassung Elektrofahrzeuge unterscheiden sich bezüglich ihres Antriebsstrangs deutlich von Kraftfahrzeugen mit verbrennungsmotorischem Antrieb. Typischerweise ist keine Trennkupplung verbaut und mit einer geringen Anzahl von Gangstufen reduzieren sich die Reibung und die Dämpfung. Ein Hauptproblem hierbei ist die Schwingungsentwicklung durch innere (Drehmomentänderungen der Elektromaschine, Bremseingriffe) und äußere Anregung (Fahrbahnunebenheiten, Schlaglöcher usw.). Um entstehende Schwingungen im Antriebsstrang und somit die Bauteilbelastungen zu verringern, sind schwingungsdämpfende Maßnahmen erforderlich. Hierbei gilt es, eine Erhöhung des Fahrkomforts ohne zu große Einbußen in der Fahrzeugdynamik zu erreichen. Dieser Artikel beschreibt Untersuchungen des dynamischen Verhaltens eines elektrischen Fahrzeugantriebsstrangs auf einem Hardware-in-the-Loop-Prüfstand. Es werden innere Anregungen durch Drehmomentänderungen der Elektromaschine beim Anfahren betrachtet. Dabei werden die Einflüsse unterschiedlicher Auflösungen des Rotorlagegebers der Elektromaschine auf die aktive Schwingungsdämpfung untersucht. Mit dem Einführen eines Beobachters für die Rotorwinkelgeschwindigkeit der Elektromaschine wird abschließend eine Optimierung des Schwingungsverhaltens des Antriebsstrangs im Falle niedrig auflösender Rotorlagegeber vorgenommen. Investigation and optimization of the influence of low-resolution rotor position encoders on the drivability functions of electrified vehicle drive systems by means of a hardware-in-the-loop test bench

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Section: Introductionunclassified

“…Ergänzend dazu wird bei [1,8,19,24] ein Beobachter eingeführt. Dieser dient zur Abschätzung des am Rad an-Abb.…”

Section: Introductionunclassified

Untersuchung und Optimierung des Einflusses von niedrig auflösenden Rotorlagegebern auf die Fahrbarkeitsfunktionen elektrifizierter Fahrzeugantriebssysteme mittels eines Hardware-in-the-Loop-Prüfstands

Koch

Schulz

Jakstas

et al. 2020

Forsch Ingenieurwes

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“…The electrical machine acts as the interface between domains to transfer useful power, but unwanted disturbances can also be passed between domains, exciting the resonant modes [1,2]. This electro-mechanical interaction can lead to accelerated aging of mechanical components [3,4] and instability in electrical systems [1]. For example, electrical load variation is transferred through the generator as fast electrical torque disturbances, increasing mechanical vibrations and causing speed fluctuations, which in turn pass back through the generator, affecting the electrical network.…”

Section: Introductionmentioning

confidence: 99%

“…Interaction has been observed in a range of systems, for example sub-synchronous resonance in land based power generation [7,8] causing early fatigue of mechanical components [9], challenges for wind power generation [10,11] causing gearbox failure [12], unpredicted faults in industrial processes such as mills [13], excessive vibration in electric and hybrid-electric vehicle drivetrains [2,14] increasing wear [4], and wave induced instability in marine propulsion systems [15]. Methods for mitigating electro-mechanical interaction include minimising gearbox backlash [16], control scheme disturbance rejection [17] and repositioning of resonant modes through design [18].…”

Section: Introductionmentioning

confidence: 99%

Analysis of electro-mechanical interaction in aircraft generator systems

Feehally

Apsley

2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-The supply of electrical power is usually achieved by a generator, driven from a prime mover, by some form of mechanical drivetrain. Such an electro-mechanical system will have natural resonant modes in both the electrical and mechanical subsystems. The electrical generator provides a coupling between the subsystems, transferring not only useful power but also disturbances between electrical and mechanical domains: these disturbances may excite resonances resulting in cross-domain (electro-mechanical) interaction. This can lead to lifetime reduction in the mechanical components and instability in the electrical network, resulting in poor reliability for the wider system, and potentially catastrophic component failure. Electro-mechanical interaction is particularly critical in power generation systems onboard aircraft, because the generator is driven by a gas turbine via an inherently low-stiffness drive train. It is then critical to identify electro-mechanical interaction at the design stage so that these issues can be avoided. However, predicting the occurrence of interaction, through simulation, is challenging, requiring multi-domain models, operating with different time scales. This paper analyses an aircraft auxiliary power offtake to produce a reduced-order mechanical drivetrain model, allowing the modal frequencies to be predicted and crossdomain interactions to be modelled. A purpose-built electromechanical test platform is used to validate the model and demonstrate how electrical disturbances are passed through the generator to the mechanical system and affect the electrical network. Future research will use the test bed to demonstrate strategies for avoiding or suppressing unwanted interactions.

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“…Based on the application this non ideal torque transmission can lead to serious problems in the drive system such as torque impulses or mechanical vibrations caused by torsional shaft oscillations. Applications where these aforementioned problems could be a matter of particular interest are electric vehicle [7], rolling mill [8] or windmill applications [9].…”

mentioning

confidence: 99%

Appropriate tuning and robust design of a generalized predictive speed controller for drive systems with resonant loads

Hoffmann

Thomsen

Fuchs

2010

2010 IEEE Energy Conversion Congress and Exposition

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This paper presents an analysis of the appropriate tuning and robust control design for a model based predictive speed controller -the Generalized Predictive Controller (GPC) -used in a drive system with a resonant load. The resonance results from a finite stiffness of a long drive shaft. The achievable control quality of a model based predictive controller dependents on the appropriate choice of the control design parameters and the accuracy of the applied system model. If the predictive controller is not tuned adequately or unmodeled dynamics occur in the control system, the speed control performance must be reduced dramatically to avoid instability. To analyze these issues an overview about the influence of the GPC design parameters to the control performance is carried out. Moreover a possibility to tune the predictive control to be robust against model mismatches and control plant parameter uncertainties is presented in this paper. The theoretical approaches are verified in experiments with a 5.5 kW drive system. Finally, a study of the impact of backlash to the proposed speed control is presented.

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Active drive control of electric vehicles using a modal state observer

Cited by 15 publications

References 3 publications

Untersuchung und Optimierung des Einflusses von niedrig auflösenden Rotorlagegebern auf die Fahrbarkeitsfunktionen elektrifizierter Fahrzeugantriebssysteme mittels eines Hardware-in-the-Loop-Prüfstands

Untersuchung und Optimierung des Einflusses von niedrig auflösenden Rotorlagegebern auf die Fahrbarkeitsfunktionen elektrifizierter Fahrzeugantriebssysteme mittels eines Hardware-in-the-Loop-Prüfstands

Analysis of electro-mechanical interaction in aircraft generator systems

Appropriate tuning and robust design of a generalized predictive speed controller for drive systems with resonant loads

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