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US 8,948,941 B2Granted
Railway vehicle vibration damping device
AssigneeKayaba Industry Co., Ltd.
InventorTakayuki Ogawa
Life of this patent
Estimating the term…
Abstract
A railway vehicle vibration damping device having at least two vibration suppression force generating sources interposed between a bogie and a vehicle body of a railway vehicle extracts from a transverse direction velocity of the vehicle body a frequency component at or above a frequency of a centrifugal acceleration of the vehicle body, and calculates a high frequency vibration suppression force on the basis thereof. When the railway vehicle travels in a curve section, at least a part of the vibration suppression force generating sources is caused to output the high frequency vibration suppression force, and the remaining vibration suppression force generating sources are caused to function as passive dampers. As a result, passenger comfort in the railway vehicle during travel in a curve section is improved.
Claims7
A railway vehicle vibration damping device comprising:
- at least two vibration suppression force generating sources interposed between a bogie and a vehicle body of a railway vehicle;
- a sensor that detects a transverse direction velocity of the vehicle body;
- and
- a programmable controller programmed to:
- extract from the transverse direction velocity of the vehicle body a frequency component at or above a frequency of a centrifugal acceleration that acts on the vehicle body when the railway vehicle travels in a curve section;
- calculate a high frequency vibration suppression force on the basis of the extracted frequency component of the transverse direction velocity;
- extract a vehicle body resonance frequency component from the transverse direction velocity of the vehicle body;
- calculate a low frequency vibration suppression force on the basis of the vehicle body resonance frequency component of the transverse direction velocity of the vehicle body;
- and
- when the railway vehicle travels in a curve section, cause at least a part of the vibration suppression force generating sources to output the high frequency vibration suppression force while causing all of the remaining vibration suppression force generating sources to function as passive dampers, and
- when the railway vehicle travels in a non-curve section, cause at least a part of the vibration suppression force generating sources to output the high frequency vibration suppression force while causing all of the remaining vibration suppression force generating sources to output the low frequency vibration suppression force.
8 more elements
A railway vehicle vibration damping device comprising:
- at least two vibration suppression force generating sources interposed between a bogie and a vehicle body of a railway vehicle;
- a sensor that detects a transverse direction velocity of the vehicle body;
- and
- a programmable controller programmed to:
- extract from the transverse direction velocity of the vehicle body a frequency component at or above a frequency of a centrifugal acceleration that acts on the vehicle body when the railway vehicle travels in a curve section;
- calculate a high frequency vibration suppression force on the basis of the extracted frequency component of the transverse direction velocity;
- extract a vehicle body resonance frequency component from the transverse direction velocity of the vehicle body;
- calculate a low frequency vibration suppression force on the basis of the vehicle body resonance frequency component of the transverse direction velocity of the vehicle body;
- when the railway vehicle travels in a non-curve section, cause at least a part of the vibration suppression force generating sources to output the high frequency vibration suppression force while causing all of the remaining vibration suppression force generating sources to output the low frequency vibration suppression force;
- and
- when the railway vehicle travels in a non-curve section, cause all of the vibration suppression force generating sources to output a combined force of the high frequency vibration suppression force and the low frequency vibration suppression force.
8 more elements
A railway vehicle vibration damping device comprising:
- at least two vibration suppression force generating sources interposed between a bogie and a vehicle body of a railway vehicle;
- a sensor that detects a transverse direction velocity of the vehicle body;
- and
- a programmable controller programmed to:
- extract from the transverse direction velocity an extracted frequency component at or above a frequency of a centrifugal acceleration that acts on the vehicle body when the railway vehicle travels in a curve section;
- calculate a high frequency vibration suppression force on a basis of the extracted frequency component;
- extract a vehicle body resonance frequency component from the transverse direction velocity;
- calculate a low frequency vibration suppression force on a basis of the vehicle body resonance frequency component;
- and
- being responsive to the railway vehicle travelling in the curve section, by causing at least one, but not all, of the vibration suppression force generating sources to output the high frequency vibration suppression force, while causing all of the remaining vibration suppression force generating sources to function as passive dampers, and
- being responsive to the railway vehicle travelling in a non-curve section, by causing at least one, but not all, of the vibration suppression force generating sources to output the high frequency vibration suppression force, while causing all of the remaining vibration suppression force generating sources to output the low frequency vibration suppression force.
8 more elements
Dependencies are inferred from the claim text.