Combined active suspension and structural damping control for suppression of flexible bodied railway vehicle vibration

Xiang Zheng, Argyrios Zolotas, Roger Goodall

Research output: Contribution to journalArticle

Abstract

The design trend for future high-speed trains is envisaged to be lightweight, rising the cost of structural vibration due to the extra flexibility. In this context, studies have looked into the suppression of such vibrations via the use of either (conventional actuators) active suspensions or by structural damping via piezoelectric actuators. The addition of extra macro-actuators will highly impact vehicle weight and is subject to location constraints, while the use of only piezo-actuators normally does not reach the required force levels for appropriate suppression. However, piezo-actuators provide appropriate complementary action with conventional active suspension. In this paper, we present a decentralised control scheme for suppressing the vertical vibration of the vehicle body, combining active structural damping via frequency-weighted H2 control and active suspension control using skyhook damping via structured H synthesis. A vertical side-view model of a flexible-bodied railway vehicle is used for the control study, with the configuration of piezoelectric actuators and sensors determined via structural norms. Stability robustness of the controller is analysed with respect to parametric and dynamic uncertainties using μ analysis techniques. Results illustrate the effectiveness of the proposed control scheme for both flexible and rigid modes while guaranteeing robustness to model uncertainty.

LanguageEnglish
JournalVehicle System Dynamics
Early online date4 Feb 2019
DOIs
Publication statusE-pub ahead of print - 4 Feb 2019
Externally publishedYes

Fingerprint

Actuators
Damping
Piezoelectric actuators
Decentralized control
Robustness (control systems)
Vibrations (mechanical)
Macros
Controllers
Sensors
Costs
Uncertainty

Cite this

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title = "Combined active suspension and structural damping control for suppression of flexible bodied railway vehicle vibration",
abstract = "The design trend for future high-speed trains is envisaged to be lightweight, rising the cost of structural vibration due to the extra flexibility. In this context, studies have looked into the suppression of such vibrations via the use of either (conventional actuators) active suspensions or by structural damping via piezoelectric actuators. The addition of extra macro-actuators will highly impact vehicle weight and is subject to location constraints, while the use of only piezo-actuators normally does not reach the required force levels for appropriate suppression. However, piezo-actuators provide appropriate complementary action with conventional active suspension. In this paper, we present a decentralised control scheme for suppressing the vertical vibration of the vehicle body, combining active structural damping via frequency-weighted H2 control and active suspension control using skyhook damping via structured H∞ synthesis. A vertical side-view model of a flexible-bodied railway vehicle is used for the control study, with the configuration of piezoelectric actuators and sensors determined via structural norms. Stability robustness of the controller is analysed with respect to parametric and dynamic uncertainties using μ analysis techniques. Results illustrate the effectiveness of the proposed control scheme for both flexible and rigid modes while guaranteeing robustness to model uncertainty.",
keywords = "active structural damping, active suspension control, frequency-weighted control, Railway vehicle, skyhook damping, μ analysis",
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