damping coefficient [ ns / m ]
DESCRIPTION
ACTIVE. DAMPING COEFFICIENT [ Ns / m ]. Hydraulic. FREQUENCY [ Hz ]. - PowerPoint PPT PresentationTRANSCRIPT
New developments for tilting trains
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Roller mechanism and Electro-mechanical Electro-mechanical Active Lateral Suspensionelectro-mechanic actuator bogie assembly tilting actuator in electro-mechanical
tilting bogie
Tilting mechanism: Roller link between the tilting bolster and the bogie frame.Electromechanical Tilting Actuator: planetary roller spindle + brushless motor driven by Electric Power Unit..Secondary suspension = single air-spring + two roll-bars.Longitudinal traction link drives anti-yaw dampers.No Active Lateral Suspension is required by swept envelope.Active Lateral Suspension where very high levels of comfort are requiredPantograph is controlled vs. catenary by an active electromechanical servo-system (brushless motor + slidingframe)
SLIDE 5 - The Electro-Mechanic Tilting Bogie
New developments for tilting trains
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Centre ofgravity
Tiltingcentre
8 °
w
w'
TAct
Kinematics of tilting and self-centring effect
Tilting systems is intrinsically self-centring in case of fault.During the tilting phase, centre of gravity is kept approximately at the same position.During the tilt rotation the reaction centre position guarantees the stabilityNo reaction is transmitted to bogie; therefore, effects to wheel/rail are negligible.
SLIDE 6- Self-centring effect.
New developments for tilting trains
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Train control system Hydraulic tilting Electro-mechanical tilting functional scheme functional scheme
SLIDE 7 - Tilting control system
Serial line 2
Serial line 1
Serial line 2
Serial line 1
MASTERUNIT
MASTERUNIT
SLAVEUNIT
SLAVEUNIT
INPUT
OUTPUT
INPUT
OUTPUT
INPUT
OUTPUT
INPUT
OUTPUT
HEADVEHICLE
HEADVEHICLE
INTERMEDIATEVEHICLE
INTERMEDIATEVEHICLE
HYDRAULICEQUIPMENT
ELECTRICALSUPPLY
SWITCH ON/OFFSIGNAL
HYDRAULICPOWER
REFERENCESIGNAL
ERRORSIGNAL
FEEDBACKSIGNAL
ELECTRONICCONTROL UNIT
HYDRAULICJACKS
CARBODYTILTING
HYDRAULIC JACKPOSITIONINGDELIVERY
Oil levelTemperatureOil pressure
ANGLETRANSDUCER
SERVOVALVE
HYDRAULICPOWER
GENERATION
CONTROL SIGNAL
KINEMATICMOTION
ELECTROMECHANICAL SYSTEM - BLOCK SCHEME
measured angle angular rateI current motorÿ lateral acceleration
z vertical axle gyro
SENSORBOXSE
ZNR
ÿ Z
WNR
DRU DRU
i
i
SA SA
I I
1, 2, i,
Z
Y X
CARBODY
z
i
i
I
DRU
i
New developments for tilting trains.
SLIDE 8 - Pendolino in the world
New developments for tilting trains
SLIDE 9 - Developments - High Cant deficiency bogies, with EM actuators and tilting rods
New developments for tilting trains
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SLIDE 10 - Developments - TILTRONIX concept
New developments for tilting trains
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SLIDE 11 - Developments – Semi active lateral Suspension
New developments for tilting trains
SLIDE 12 - Developments – Active Dampers
DA
MP
ING
CO
EF
FIC
IEN
T [
Ns
/ m ]
ACTIVEACTIVE
HydraulicHydraulic
FREQUENCY [ Hz ]
0 5 10 15 200
1
2
3
4
5
am
p. [
m/s2 ]
freq. [Hz]
file:accbocc.axtr
250 acc. can 1 r.m.s. 5.9044
0 0.5 1 1.5 2 2.5 3 3.5 4-15
-10
-5
0
5
10
15
time [s]
[m/s
2 ]
New developments for tilting trains