Development of a Vertical Semi-active Suspension System Using Variable Hydraulic Dampers
Plans are being made in Japan to launch luxury cruise trains for sightseeing tours. These trains are expected to use both main and secondary railway lines on the network. Secondary lines in particular can sometimes be subject to significant irregularities because maintenance criteria are lower than for mainlines. As a result, rigid-body-mode vibrations, and in particular those in the 1–2 Hz frequency range, tend to increase, which may result in reduced ride comfort. As such, a secondary suspension damping control system using variable vertical hydraulic dampers was developed to mitigate this type of vibration. The system consists of four dampers, a controller, and four accelerometers. Variable vertical dampers are mounted parallel to the secondary air springs. The damping force can be controlled by the command current. The control algorithm which controls the variable dampers is based on the sky-hook control theory. The controller is also equipped with an algorithm which is geared to monitor the state of the damper, which does not require the use of sensors in the system. The algorithm examines the phase difference between the bounce and pitch vibration modes of the car body with the accelerometers used to control the dampers. When a fault is detected, a fail-safe function is activated, stopping damper controlling automatically. Vehicle running tests using an actual vehicle equipped with the control system were carried out. In the tests, the system reduced the peak in the power spectrum density for vertical vibration acceleration due to the rigid-body-mode vibration of the car body by almost 40 per cent compared to when the system was not used.
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Availability:
- Find a library where document is available. Order URL: http://www.witpress.com/books/978-1-78466-123-6
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Supplemental Notes:
- Abstract reprinted with permission from WIT Press.
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Corporate Authors:
Ashurst Lodge
Ashurst, Southampton United Kingdom SO40 7AA -
Authors:
- Sugahara, Y
- Kojima, T
- Akami, Y
- Igarashi, Y
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Conference:
- 15th International Conference on Railway Engineering Design and Operation (COMPRAIL 2016)
- Location: Madrid , Spain
- Date: 2016-7-19 to 2016-7-21
- Publication Date: 2016
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 469-477
- Monograph Title: Computers in Railways XV: Railway Engineering Design and Operation
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Serial:
- WIT Transactions on the Built Environment
- Volume: 162
- Publisher: Wessex Institute of Technology
- ISSN: 1743-3509
- Serial URL: http://library.witpress.com/pages/listBooks.asp?tID=2
Subject/Index Terms
- TRT Terms: Dampers; Passenger trains; Ride quality; Sensors; Tourism; Vibration
- Geographic Terms: Japan
- Subject Areas: Maintenance and Preservation; Operations and Traffic Management; Railroads;
Filing Info
- Accession Number: 01614563
- Record Type: Publication
- ISBN: 9781784661236
- Files: TRIS
- Created Date: Oct 25 2016 9:59AM