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IMPROVED CURVING PERFORMANCE FOR TWO-AXLE RAIL VEHICLES WITH ACTUATED SOLID WHEELSETS USING H-infinity CONTROL
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Rail Vehicles.ORCID iD: 0000-0002-0875-3520
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Rail Vehicles.ORCID iD: 0000-0002-8237-5847
2016 (English)In: PROCEEDINGS OF THE ASME JOINT RAIL CONFERENCE, 2016, AMER SOC MECHANICAL ENGINEERS , 2016Conference paper, Published paper (Refereed)
Resource type
Text
Abstract [en]

Application of active suspension on passenger vehicles has engaged many vehicle dynamics specialists in recent years. The technology can be used for different purposes including improving comfort, stability or wear behavior. Despite these benefits, industries do not yet find these technologies attractive enough. One reason is that the achieved benefits do not pay back for itself since the vehicle will become more expensive. Therefore, more steps should be taken to make active suspension attractive. One such a step can be using active suspension for resolving classical limitations in rail vehicle dynamics. An example of this is a non-bogie rail vehicle with two axles. One of the problems associated with these vehicles is their short axle distance limiting the length of the vehicle. The short axle distance is partly for limiting wheel-rail wear. This paper describes how to reduce wheel wear through achieving better wheelset steering in curves so that longer axle distances can be allowed. Wheelset steering is performed by H-infinity control strategy.

Place, publisher, year, edition, pages
AMER SOC MECHANICAL ENGINEERS , 2016.
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-191036DOI: 10.1115/JRC2016-5775ISI: 000380172900080Scopus ID: 2-s2.0-84978917065OAI: oai:DiVA.org:kth-191036DiVA: diva2:955525
Conference
2016 Joint Rail Conference, JRC 2016; Columbia; United States; 12 April 2016 through 15 April 2016
Note

QC 20160825

Available from: 2016-08-25 Created: 2016-08-23 Last updated: 2017-06-01Bibliographically approved
In thesis
1. On Active Suspension in Rail Vehicles
Open this publication in new window or tab >>On Active Suspension in Rail Vehicles
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The topic of this PhD thesis is active suspension in rail vehicles whichis usually realized through sensors, controllers and actuation components.A well established example of an active suspension is the tiltingcontrol system used to tilt the carbody in curves to reduce centrifugalacceleration felt by passengers. Active suspension for rail vehicles is beingstudied since 1970s and in this PhD thesis it has been tried to expandon some aspects of this topic.This study extends the research field by both experimental and theoreticalstudies. In the first phase of the study which led to a licentiatedegree the focus was more on experimental work with active verticalsuspension (AVS). This was implemented by introducing actuators inthe secondary suspension of a Bombardier test train, Regina 250, in thevertical direction. The aim has been to improve vertical ride comfort bycontrolling bounce, pitch and roll motions.In the second phase after the licentiate, the studies have been moretheoretical and can be divided into two parts. The first part of the workhas been more focused on equipping two-axle rail vehicles with differentactive suspension solutions for improving the vehicle performanceregarding comfort and wheel-rail interaction. Three papers are writtenon active suspension for two-axle rail vehicles. Two of the papers discussthe use of H¥ control for wheelset guidance in curves to reducewheel-rail damage. The third paper shows that by use of active verticaland lateral suspension (AVS and ALS) in two-axle rail vehicles goodcomfort can be achieved as well. The paper then studies how the threeactive suspension systems (ALS, AVS, and ASW) interact once implementedtogether on a two-axle rail vehicle.The second part is a study on safety of active suspension systems.The study discusses a possible procedure to ensure that a designed activesuspension for a rail vehicle will be safe in all possible failure situations.

Place, publisher, year, edition, pages
Stockholm, Sweden: KTH Royal Institute of Technology, 2017. 100 p.
Series
TRITA-AVE, ISSN 1651-7660 ; 2017:32
Keyword
active suspension, ride comfort, wear, skyhook control, H_infinity control, two-axle rail vehicle, safety
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-208184 (URN)978-91-7729-408-5 (ISBN)
Public defence
2017-05-31, F3, Lindstedtsvägen 26, KTH Royal Institute of Technology, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20170602

Available from: 2017-06-02 Created: 2017-06-01 Last updated: 2017-06-02Bibliographically approved

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CiteExportLink to record
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Output format
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