damping coefficient [ ns / m ]

New developments for tilting trains

.

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


.

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.


.

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


SLIDE 9 - Developments - High Cant deficiency bogies, with EM actuators and tilting rods


.

SLIDE 10 - Developments - TILTRONIX concept


.

SLIDE 11 - Developments – Semi active lateral Suspension


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 ]

damping coefficient [ ns / m ]

Documents