EP0636527A1 - Method for centering of steerable axles of a bogie - Google Patents

Method for centering of steerable axles of a bogie Download PDF

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Publication number
EP0636527A1
EP0636527A1 EP94401724A EP94401724A EP0636527A1 EP 0636527 A1 EP0636527 A1 EP 0636527A1 EP 94401724 A EP94401724 A EP 94401724A EP 94401724 A EP94401724 A EP 94401724A EP 0636527 A1 EP0636527 A1 EP 0636527A1
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EP
European Patent Office
Prior art keywords
axles
bogie
centering
signal
axle
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP94401724A
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German (de)
French (fr)
Inventor
Roger Bernard
Jacques Bevand
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Alstom Transport SA
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GEC Alsthom Transport SA
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Publication date
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Publication of EP0636527A1 publication Critical patent/EP0636527A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/38—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/38—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
    • B61F5/383—Adjustment controlled by non-mechanical devices, e.g. scanning trackside elements

Definitions

  • the present invention relates to a method for centering the steerable axles of a bogie.
  • the method for centering the steerable axles of a bogie of the invention applies more particularly to a bogie with two steerable axles.
  • Such bogies include, for example, a chassis connected to each axle by means of two axle boxes and a primary suspension formed from deformable elastic blocks.
  • the orientation of the axles is achieved by means of jacks controlled by a track sensor. Under the action of these cylinders, the elastic primary suspensions are deformed to allow the axle to assume a radial position in a track curve. Axle orientation is usually accomplished by flexible suspension. Stability of the axle in a straight line is then ensured by means other than flexible suspensions.
  • the advantage of bogies with steerable axles, more particularly for the metro and tramway networks, is to reduce the nuisance caused by the "iron” equipment, namely: squealing, wear of rails and wheels, as well as solidian vibrations transmitted to buildings.
  • the method for centering the steerable axles of a bogie of the invention is characterized in that, at the entrance to a track curve, at least one of the axles is oriented towards the center of the curve and in that each wheel is positioned transversely to the track so that each of the wheels is at the same distance from its rail.
  • the method of centering the steerable axles of a bogie of the invention is characterized in that, in a track curve, at least one of the axles is arranged radially to the curved and is centered transversely to the two lines of rail in the track.
  • the method of centering the steerable axles of a bogie of the invention is characterized in that a signal whose value would not fall within a predefined range of values is considered to be invalid , the resulting signal then being extrapolated from a previous value and the only signal remaining valid.
  • the method for centering the steerable axles of a bogie of the invention is characterized in that, if only a valid signal exists, it is also invalidated, the last resulting signal being then considered invariant until the two signals have become valid again.
  • the method for centering the steerable axles of a bogie is characterized in that, following a failure of the control or power devices, the bogie's axle control is neutralized by an internal detection device by eliminating all power controls so that the vehicle returns to a conventional configuration.
  • the particularity of the method for centering the steerable axles of a bogie according to the invention lies in the fact that the servo-control described below makes it possible to center the axle in the track.
  • An advantage of the method for centering the steerable axles of a bogie according to the invention is that it applies to any bogie with steerable axles of the prior art having at least one lane detector.
  • An advantage of the bogie with steerable axles according to the invention is therefore to provide positive security for the stability function of the bogie with steerable axles.
  • Another advantage of the method for centering the steerable axles of a bogie according to the invention lies in the fact that the vehicles using the steerable bogies of the invention can be driven on tracks which do not require any particular adaptation.
  • the orientation of the axles of the bogie of the invention is achieved by servo-control.
  • the servo-control operates permanently on a track in alignment or when crossing curves.
  • Sensors 1-4 equip the axles 5 and 6 and each have the function of detecting the axis of magnetic symmetry of the rail 7 or 8 with which it is associated.
  • Each sensor is arranged longitudinally in front of or behind the axis of the axle.
  • the sensors are for example of the type described in French application N ° 90.04436.
  • Each active sensor delivers a signal which is a function of the offset between its position and the magnetic axis of the rail. However, these signals are not measured vertically but in front of the axles. The signals delivered are summed so as to have, for each axle, a signal resulting from the offset of the axle relative to the longitudinal axis of the track.
  • the resulting signal constitutes the disturbance added to a zero setpoint in the external loop of a servo in position which may include one or more other internal loops.
  • the output signal from the servo circuit controls a set of two cylinders 9,10; 11.12; 13.14 and 15.16 per axle. These cylinders are arranged approximately longitudinally in the bogie and control the orientation of the axle by bearing on the chassis 17, 18 of bogie. The torque exerted by the jacks acts in the favorable direction to reduce the signal resulting from the set point produced from each of the two axle sensors.
  • the objective sought is to keep the axles as close as possible to the center of the track, while eliminating the influence of the variations in the spacing of the rails, by seeking to center the axles laterally at the level of the sensors, that is to say , in front of their own axis of rotation.
  • the axle orientation control device described above is an active system. Its implementation requires at least one power source 19.20, for example a hydraulic source.
  • the servo In the event of failure of the control or power devices, the servo is neutralized by an internal detection device by eliminating all power commands. The vehicle is then in a conventional configuration. Control is therefore no longer ensured and the vehicle's security level is that of a conventional vehicle.
  • the bogie with steerable axles is fitted with relatively stiff primary suspensions to ensure sufficient stability of the vehicle at maximum commercial speed.
  • each sensor delivers a signal whose value is compared to a predefined range of values. A value which is not included in the predefined range of values is considered invalid. The resulting signal is then extrapolated from a previous value and the only signal remaining valid. This situation is encountered in particular when passing over singular points such as switches and crossings. This procedure is applied until both signals have become valid again.
  • the bogie with orientable axles comprises four sensors arranged on the side external to the axles of the bogie.
  • the bogie with steerable axles has a set of two active sensors for each direction of travel.
  • the sensors therefore make it possible to obtain a single resulting signal.
  • This unique resulting signal is associated with the first of the two axles disposed in the direction of travel and is used to drive the two axles.
  • the vehicle axles can either be conventional axles, with wheels fixed on the same axis, or axles with independent wheels, using a differential.
  • Vehicles may use the safety system and procedure of the invention only for part of their bogies with steerable axles.
  • the extreme axles of a vehicle are equipped for both directions of travel. We then have a single resulting signal associated with the driving axle to drive four axles. To do this and taking into account the real values of the dimensions that come into play, namely: distance between bogie, length of connection curves, speed, it is necessary to develop a signal out of phase with the first, to control the second bogie.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)

Abstract

The present invention relates to a method for centring the steerable axles of a bogie, characterised in that, at the entrance of a track curve, at least one of the axles (5,6) is steered towards the centre of the curve, and in that each wheel is positioned transversely relative to the track, in such a way that each of the wheels is at the same distance from its rail (7,8). <IMAGE>

Description

La présente invention concerne un procédé de centrage des essieux orientables d'un bogie.The present invention relates to a method for centering the steerable axles of a bogie.

Le procédé de centrage des essieux orientables d'un bogie de l'invention s'applique plus particulièrement à un bogie à deux essieux orientables. De tels bogies comportent, par exemple, un châssis relié à chaque essieu par l'intermédiaire de deux boîtes d'essieux et d'une suspension primaire formée de blocs élastiques déformables.The method for centering the steerable axles of a bogie of the invention applies more particularly to a bogie with two steerable axles. Such bogies include, for example, a chassis connected to each axle by means of two axle boxes and a primary suspension formed from deformable elastic blocks.

Dans de tels bogies de l'art antérieur, l'orientation des essieux est réalisée au moyens de vérins commandés par un capteur de voie. Sous l'action de ces vérins, les suspensions primaires élastiques se déforment pour permettre à l'essieu de prendre une position radiale dans une courbe de voie. L'orientation d'essieux est habituellement réalisée au moyen de suspension souples. La stabilité de l'essieu en ligne droite est alors assurée par d'autres moyens que les suspensions souples.In such bogies of the prior art, the orientation of the axles is achieved by means of jacks controlled by a track sensor. Under the action of these cylinders, the elastic primary suspensions are deformed to allow the axle to assume a radial position in a track curve. Axle orientation is usually accomplished by flexible suspension. Stability of the axle in a straight line is then ensured by means other than flexible suspensions.

L'intérêt des bogies à essieux orientables, plus particulièrement pour les réseaux de métro et de tramway, est de diminuer les nuisances engendrées par le marériel "fer", à savoir: les crissements, l'usure des rails et des roues, ainsi que les vibrations solidiennes transmises aux bâtiments.The advantage of bogies with steerable axles, more particularly for the metro and tramway networks, is to reduce the nuisance caused by the "iron" equipment, namely: squealing, wear of rails and wheels, as well as solidian vibrations transmitted to buildings.

C'est le mérite de la demanderese que de proposer un procédé de centrage des essieux orientables d'un bogie basé sur un nouveau principe d'asservissement et permettant de diminuer le niveau sonore du matériel roulant.It is the merit of the request to propose a method for centering the steerable axles of a bogie based on a new principle of servo-control and making it possible to reduce the noise level of rolling stock.

Conformément à une caractéristique essentielle de l'invention, le procédé de centrage des essieux orientables d'un bogie de l'invention, est caractérisé en ce que, à l'entrée d'une courbe de voie, l'un au moins des essieux est orienté vers le centre de la courbe et en ce que chaque roue est positionnée transversalement par rapport à la voie de manière à ce que chacune des roues soit à la même distance de son rail.In accordance with an essential characteristic of the invention, the method for centering the steerable axles of a bogie of the invention is characterized in that, at the entrance to a track curve, at least one of the axles is oriented towards the center of the curve and in that each wheel is positioned transversely to the track so that each of the wheels is at the same distance from its rail.

Conformément à une autre caractéristique de l'invention, le procédé de centrage des essieux orientables d'un bogie de l'invention, est caractérisé en ce que, dans une courbe de voie, l'un au moins des essieux est disposé radialement à la courbe et est centré transversalement par rapport aux deux files de rail de la voie.According to another characteristic of the invention, the method of centering the steerable axles of a bogie of the invention, is characterized in that, in a track curve, at least one of the axles is arranged radially to the curved and is centered transversely to the two lines of rail in the track.

Conformément à une autre caractéristique de l'invention, le procédé de centrage des essieux orientables d'un bogie de l'invention, est caractérisé par:

  • la détection d'un axe de symétrie magnétique du rail associé à au moins un détecteur de manière à obtenir un signal fonction de la position dudit détecteur et dudit axe magnétique;
  • la sommation desdits signaux de manière à obtenir, pour chaque essieu, un signal résultant fonction du décalage entre l'essieu et ledit axe magnétique; et par
  • le déplacement en rotation d'au moins un essieu dans le sens permettant de réduire ledit signal résultant.
According to another characteristic of the invention, the method of centering the steerable axles of a bogie of the invention is characterized by:
  • detecting an axis of magnetic symmetry of the rail associated with at least one detector so as to obtain a signal which is a function of the position of said detector and of said magnetic axis;
  • summing said signals so as to obtain, for each axle, a signal resulting from the offset between the axle and said magnetic axis; and by
  • the displacement in rotation of at least one axle in the direction making it possible to reduce said resulting signal.

Conformément à une autre caractéristique de l'invention, le procédé de centrage des essieux orientables d'un bogie de l'invention, est caractérisé en ce que un signal dont la valeur ne serait pas comprise dans une gamme de valeurs prédéfinnie est considéré comme invalide, le signal résultant étant alors extrapolé à partir d'une valeur précédente et du seul signal restant valide.According to another characteristic of the invention, the method of centering the steerable axles of a bogie of the invention, is characterized in that a signal whose value would not fall within a predefined range of values is considered to be invalid , the resulting signal then being extrapolated from a previous value and the only signal remaining valid.

Conformément à une autre caractéristique de l'invention, le procédé de centrage des essieux orientables d'un bogie de l'invention, est caractérisé en ce que, si seul un signal valide existe celui-ci est également invalidé, le dernier signal résultant étant alors considéré comme invariant jusqu'à ce que les deux signaux soient redevenus valides.According to another characteristic of the invention, the method for centering the steerable axles of a bogie of the invention, is characterized in that, if only a valid signal exists, it is also invalidated, the last resulting signal being then considered invariant until the two signals have become valid again.

Conformément à une autre caractéristique de l'invention, le procédé de centrage des essieux orientables d'un bogie est caractérisé en ce que, suite à une défaillance des dispositifs de commande ou de puissance, l'asservissement des essieux du bogie est neutralisé par un dispositif de détection interne en éliminant toutes les commandes de puissances de telle manière que le véhicule redevienne dans une configuration conventionnelle.According to another characteristic of the invention, the method for centering the steerable axles of a bogie is characterized in that, following a failure of the control or power devices, the bogie's axle control is neutralized by an internal detection device by eliminating all power controls so that the vehicle returns to a conventional configuration.

La particularité du procédé de centrage des essieux orientables d'un bogie selon l'invention réside dans le fait que l'asservissement décrit ci-après permet de centrer l'essieu dans la voie.The particularity of the method for centering the steerable axles of a bogie according to the invention lies in the fact that the servo-control described below makes it possible to center the axle in the track.

Compte-tenu des valeurs réelles des dimensions du rayon des courbes, du déport des capteurs en avant de l'essieu, des coefficients de roulement transversal et du jeu des essieux dans la voie, lorsque le centrage défini précédemment est satisfait dans des limites acceptables, la radialité de l'essieu dans la voie devient une conséquence de celui-ci.Taking into account the actual values of the dimensions of the radius of the curves, the offset of the sensors in front of the axle, the transverse rolling coefficients and the play of the axles in the track, when the previously defined centering is satisfied within acceptable limits, the radiality of the axle in the track becomes a consequence of it.

Un avantage du procédé de centrage des essieux orientables d'un bogie selon l'invention est qu'il s'applique à tout bogie à essieux orientables de l'art antérieur disposant d'au moins un détecteur de voies.An advantage of the method for centering the steerable axles of a bogie according to the invention is that it applies to any bogie with steerable axles of the prior art having at least one lane detector.

Un autre avantage du procédé de centrage des essieux orientables d'un bogie selon l'invention réside dans le fait que la rotation de chaque essieu se fait autour de son centre géométrique, d'où:

  • une répartition des déflections des suspensions et donc des valeurs moindres,
  • une symétrie des éléments, et
  • un débattement plus réduit de la liaison essieu et accouplement sur moteur.
Another advantage of the method for centering the orientable axles of a bogie according to the invention lies in the fact that the rotation of each axle takes place around its geometric center, hence:
  • a distribution of deflections from the suspensions and therefore lower values,
  • symmetry of the elements, and
  • reduced travel of the axle and coupling on the engine.

Un avantage du bogie à essieux orientables selon l'invention est donc d'assurer une sécurité positive de la fonction stabilité du bogie à essieux orientables.An advantage of the bogie with steerable axles according to the invention is therefore to provide positive security for the stability function of the bogie with steerable axles.

Un autre avantage du procédé de centrage des essieux orientables d'un bogie selon l'invention réside dans le fait que les véhicules utilisant les bogies à essieux orientables de l'invention peuvent circuler sur des voies ne nécessitant aucune adaptation particulière.Another advantage of the method for centering the steerable axles of a bogie according to the invention lies in the fact that the vehicles using the steerable bogies of the invention can be driven on tracks which do not require any particular adaptation.

D'autres buts, caractéristiques et avantages du procédé de centrage des essieux orientables d'un bogie selon l'invention apparaîtrons à la lecture de la description du principe d'asservissement de l'invention faite en liaison avec les dessins joints dans lesquels:

  • la figure 1 est une vue de côté des bogies d'un véhicule ferroviaire dont les essieux orientables sont centrés conformément au procédé de l'invention; et
  • la figure 2 est une vue de dessous des bogies de la figure précédente.
Other aims, characteristics and advantages of the method for centering the steerable axles of a bogie according to the invention will appear on reading the description of the principle of servo-control of the invention made in conjunction with the accompanying drawings in which:
  • Figure 1 is a side view of the bogies of a railway vehicle whose steerable axles are centered according to the method of the invention; and
  • Figure 2 is a bottom view of the bogies of the previous figure.

L'orientation des essieux du bogie de l'invention est réalisé par asservissement.The orientation of the axles of the bogie of the invention is achieved by servo-control.

Selon un premier mode de réalisation, l'asservissement fonctionne en permanence sur voie en alignement ou lors du franchissement de courbes.According to a first embodiment, the servo-control operates permanently on a track in alignment or when crossing curves.

Des capteurs 1-4 équipent les essieux 5 et 6 et ont chacun pour fonction de détecter l'axe de symétrie magnétique du rail 7 ou 8 auquel il est associé.Sensors 1-4 equip the axles 5 and 6 and each have the function of detecting the axis of magnetic symmetry of the rail 7 or 8 with which it is associated.

Chaque capteur est disposé longitudinalement en avant ou en arrière de l'axe de l'essieu. Les capteurs sont par exemple du type décrit dans la demande française N° 90.04436.Each sensor is arranged longitudinally in front of or behind the axis of the axle. The sensors are for example of the type described in French application N ° 90.04436.

Chaque capteur actif délivre un signal fonction du décalage entre sa position et l'axe magnétique du rail. Ces signaux ne sont toutefois pas mesurés à la verticale des essieux mais en avant de ceux-ci. Les signaux délivrés sont sommés de manière à disposer, pour chaque essieu, d'un signal résultant fonction du décalage de l'essieu par rapport à l'axe longitudinal de la voie.Each active sensor delivers a signal which is a function of the offset between its position and the magnetic axis of the rail. However, these signals are not measured vertically but in front of the axles. The signals delivered are summed so as to have, for each axle, a signal resulting from the offset of the axle relative to the longitudinal axis of the track.

Le signal résultant constitue la perturbation ajoutée à une consigne nulle dans la boucle externe d'un asservissement en position pouvant comporter une ou plusieurs autres boucles internes.The resulting signal constitutes the disturbance added to a zero setpoint in the external loop of a servo in position which may include one or more other internal loops.

Le signal de sortie du circuit d'asservissement commande un jeu de deux vérins 9,10; 11,12; 13,14 et 15,16 par essieu. Ces vérins sont disposés à peu près longitudinalement dans le bogie et commandent l'orientation de l'essieu en prenant appui sur le châssis 17, 18 de bogie. Le couple exercé par les vérins agit dans le sens favorable pour réduire le signal résultant de consigne élaboré à partir de chacun des deux capteurs de l'essieu.The output signal from the servo circuit controls a set of two cylinders 9,10; 11.12; 13.14 and 15.16 per axle. These cylinders are arranged approximately longitudinally in the bogie and control the orientation of the axle by bearing on the chassis 17, 18 of bogie. The torque exerted by the jacks acts in the favorable direction to reduce the signal resulting from the set point produced from each of the two axle sensors.

L'objectif recherché est de maintenir les essieux le plus près possible du centre de la voie, tout en éliminant l'influence des variations d'écartement des rails, en cherchant à centrer les essieux latéralement au niveau des capteurs, c'est à dire, en avant de leur axe de rotation propre.The objective sought is to keep the axles as close as possible to the center of the track, while eliminating the influence of the variations in the spacing of the rails, by seeking to center the axles laterally at the level of the sensors, that is to say , in front of their own axis of rotation.

Le dispositif de commande d'orientation des essieux décrit précédemment est un système actif. Sa mise en oeuvre nécessite au moins une source de puissance 19,20, par exemple une source hydraulique.The axle orientation control device described above is an active system. Its implementation requires at least one power source 19.20, for example a hydraulic source.

En cas de défaillance des dispositifs de commande ou de puissance, l'asservissement est neutralisé par un dispositif de détection interne en éliminant toutes les commandes de puissances. Le véhicule est alors dans une configuration conventionnelle. L'asservissement n'est donc plus assuré et le niveau de sécurité du véhicule est celui d'un véhicule conventionnel.In the event of failure of the control or power devices, the servo is neutralized by an internal detection device by eliminating all power commands. The vehicle is then in a conventional configuration. Control is therefore no longer ensured and the vehicle's security level is that of a conventional vehicle.

Pour ce faire le bogie à essieux orientables est équipé de suspensions primaires relativement raides pour assurer une stabilité suffisante du véhicule en vitesse commerciale maximale.To do this, the bogie with steerable axles is fitted with relatively stiff primary suspensions to ensure sufficient stability of the vehicle at maximum commercial speed.

Comme décrit précédemment, chaque capteur délivre un signal dont la valeur est comparée à une gamme de valeurs prédéfinie. Une valeur qui ne serait pas comprise dans la gamme de valeurs prédéfinnie est considérée comme invalide. Le signal résultant est alors extrapolé à partir d'une valeur précédente et du seul signal restant valide. Cette situation se rencontre en particulier lors du passage sur des points singuliers tels que les appareils de voie. Cette procédure est appliquée jusqu'à ce que les deux signaux soient redevenues valides.As described above, each sensor delivers a signal whose value is compared to a predefined range of values. A value which is not included in the predefined range of values is considered invalid. The resulting signal is then extrapolated from a previous value and the only signal remaining valid. This situation is encountered in particular when passing over singular points such as switches and crossings. This procedure is applied until both signals have become valid again.

Conformément à une autre procédure, si seul un signal valide existe celui-ci est également invalidé. Le dernier signal résultant est alors considéré comme invariant jusqu'à ce que les deux signaux soient redevenues valides.According to another procedure, if only a valid signal exists, this is also invalidated. The last resulting signal is then considered to be invariant until the two signals have become valid again.

Il est évident que d'autres procédures sont possibles.It is obvious that other procedures are possible.

Dans le cas ou deux capteurs d'essieux délivrent des signaux considérés comme étant invalides, une solution consiste à considérer le dernier signal résultant comme invariant.In the case where two axle sensors deliver signals considered to be invalid, one solution consists in considering the last resulting signal as invariant.

Dans tous les cas, ces procédures dégradées, si elles se poursuivent sur une distance supérieure à une valeur pré-définie, peuvent être assimilées à une défaillance de l'asservissement.In all cases, these degraded procedures, if they continue for a distance greater than a predefined value, can be assimilated to a failure of the servo-control.

Conformément à un autre mode de réalisation de l'invention, le bogie à essieux orientables comporte quatre capteurs disposés du côté externe aux essieux du bogie. En d'autres termes, le bogie à essieux orientables comporte un jeu de deux capteurs actifs pour chaque sens de marche.According to another embodiment of the invention, the bogie with orientable axles comprises four sensors arranged on the side external to the axles of the bogie. In other words, the bogie with steerable axles has a set of two active sensors for each direction of travel.

Dans un tel mode de réalisation, les capteurs permettent donc l'obtention d'un seul signal résultant. Ce signal résultant unique est associé au premier des deux essieux disposé dans le sens de la marche et est utilisé pour piloter les deux essieux.In such an embodiment, the sensors therefore make it possible to obtain a single resulting signal. This unique resulting signal is associated with the first of the two axles disposed in the direction of travel and is used to drive the two axles.

Les avantages de ce mode de réalisation, sont ses très bonnes performances malgré le nombre réduit des éléments.The advantages of this embodiment are its very good performance despite the reduced number of elements.

Les essieux du véhicule peuvent être soit des essieux conventionnels, à roues calées sur le même axe, soit des essieux à roues indépendantes, utilisant un différentiel.The vehicle axles can either be conventional axles, with wheels fixed on the same axis, or axles with independent wheels, using a differential.

Les véhicules peuvent n'utiliser le système et la procédure de sécurité de l'invention que pour une partie de leurs bogies à essieux orientables.Vehicles may use the safety system and procedure of the invention only for part of their bogies with steerable axles.

A titre d'exemple, les essieux extrêmes d'un véhicule sont équipés pour les deux sens de marche. On dispose alors d'un seul signal résultant associé à l'essieu d'attaque pour piloter quatre essieux. Pour ce faire et compte-tenu des valeurs réelles des dimensions qui entrent en jeu, à savoir: distance entre bogie, longueur des courbes de raccordement, vitesse, il est nécessaire d'élaborer un signal déphasé par rapport au premier, pour commander le deuxième bogie.For example, the extreme axles of a vehicle are equipped for both directions of travel. We then have a single resulting signal associated with the driving axle to drive four axles. To do this and taking into account the real values of the dimensions that come into play, namely: distance between bogie, length of connection curves, speed, it is necessary to develop a signal out of phase with the first, to control the second bogie.

Claims (6)

Procédé de centrage des essieux orientables d'un bogie caractérisé en ce que, à l'entrée d'une courbe de voie, l'un au moins des essieux est orienté vers le centre de la courbe et en ce que chaque roue est positionnée transversalement par rapport à la voie de manière à ce que chacune des roues soit à la même distance de son rail.Method for centering the steerable axles of a bogie characterized in that, at the entrance to a track curve, at least one of the axles is oriented towards the center of the curve and in that each wheel is positioned transversely relative to the track so that each of the wheels is at the same distance from its rail. Procédé de centrage des essieux orientables d'un bogie; caractérisé en ce que, dans une courbe de voie, l'un au moins des essieux est disposé radialement à la courbe et est centré transversalement par rapport aux deux files de rail de la voie.Method for centering the steerable axles of a bogie; characterized in that, in a track curve, at least one of the axles is arranged radially to the curve and is centered transversely with respect to the two rail lines of the track. Procédé de centrage des essieux orientables d'un bogie; caractérisé par: - la détection d'un axe de symétrie magnétique du rail associé à au moins un détecteur de manière à obtenir un signal fonction de la position dudit détecteur et dudit axe magnétique; - la sommation desdits signaux de manière à obtenir, pour chaque essieu, un signal résultant fonction du décalage entre l'essieu et ledit axe magnétique; et par - le déplacement en rotation d'au moins un essieu dans le sens permettant de réduire ledit signal résultant. Method for centering the steerable axles of a bogie; characterized by: the detection of an axis of magnetic symmetry of the rail associated with at least one detector so as to obtain a signal which is a function of the position of said detector and of said magnetic axis; - summing said signals so as to obtain, for each axle, a signal resulting from the offset between the axle and said magnetic axis; and by the displacement in rotation of at least one axle in the direction making it possible to reduce said resulting signal. Procédé de centrage selon la revendication 3; dans lequel un signal dont la valeur ne serait pas comprise dans une gamme de valeurs prédéfinnie est considérée comme invalide, le signal résultant étant alors extrapolé à partir d'une valeur précédente et du seul signal restant valide.Centering method according to claim 3; in which a signal whose value would not fall within a predefined range of values is considered to be invalid, the resulting signal then being extrapolated from a previous value and from the only signal remaining valid. Procédé de centrage selon la revendication 4; dans lequel, si seul un signal valide existe celui-ci est également invalidé, le dernier signal résultant étant alors considéré comme invariant jusqu'à ce que les deux signaux soient redevenues valides.Centering method according to claim 4; in which, if only a valid signal exists, it is also invalidated, the last resulting signal being then considered invariant until the two signals have become valid again. Procédé de centrage selon l'une quelconque des revendications 1 à 5; dans lequel, suite à une défaillance des dispositifs de commande ou de puissance, l'asservissement des essieux du bogie est neutralisé en éliminant toutes les commandes de puissances de telle manière que le véhicule redevienne dans une configuration conventionnelle.Centering method according to any one of claims 1 to 5; in which, following a failure of the control or power devices, the servo-control of the axles of the bogie is neutralized by eliminating all the power controls so that the vehicle returns to a conventional configuration.
EP94401724A 1993-07-30 1994-07-27 Method for centering of steerable axles of a bogie Ceased EP0636527A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9309423A FR2708548B1 (en) 1993-07-30 1993-07-30 Method for centering the steerable axles of a bogie.
FR9309423 1993-07-30

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EP0636527A1 true EP0636527A1 (en) 1995-02-01

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EP (1) EP0636527A1 (en)
JP (1) JPH0752794A (en)
KR (1) KR950003103A (en)
AU (1) AU672506B2 (en)
BR (1) BR9402988A (en)
CA (1) CA2128811A1 (en)
FI (1) FI943534A (en)
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AUPN254995A0 (en) * 1995-04-21 1995-05-18 Craft Nominees Pty Ltd Rail head lubricating apparatus
CN100389035C (en) * 2005-08-25 2008-05-21 李岭群 Permanent magnetic suspension composite bogie
ES2316220B1 (en) * 2006-02-24 2010-01-12 Patentes Talgo, S.L. METHOD FOR OPTIMIZING GUIDANCE OF RAILWAY VEHICLES.
KR100911921B1 (en) 2007-11-08 2009-08-13 한국철도기술연구원 Setting Method of Virtual Rigid Axles for Steering Control
US20100248884A1 (en) * 2009-03-31 2010-09-30 Richard Tremblay Transmission for an Electrically Powered Vehicle

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FR2244655A1 (en) * 1973-09-20 1975-04-18 Mte
FR2530567A1 (en) * 1982-07-26 1984-01-27 Anf Ind BOGIE WITH AXLES ORIENTABLE FOR RAILWAY VEHICLES
WO1988002712A1 (en) * 1986-10-14 1988-04-21 Matra Transport Axle with magnetic steering for railway vehicle
EP0318923A1 (en) * 1987-12-03 1989-06-07 Gec Alsthom Sa Railway vehicle with steered axles

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DE882562C (en) * 1951-12-15 1953-07-09 Maschf Augsburg Nuernberg Ag Steering device for steering racks, especially in lightweight rail vehicles
FR2244655A1 (en) * 1973-09-20 1975-04-18 Mte
FR2530567A1 (en) * 1982-07-26 1984-01-27 Anf Ind BOGIE WITH AXLES ORIENTABLE FOR RAILWAY VEHICLES
WO1988002712A1 (en) * 1986-10-14 1988-04-21 Matra Transport Axle with magnetic steering for railway vehicle
EP0318923A1 (en) * 1987-12-03 1989-06-07 Gec Alsthom Sa Railway vehicle with steered axles

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FI943534A0 (en) 1994-07-27
FR2708548B1 (en) 1995-09-01
KR950003103A (en) 1995-02-16
FR2708548A1 (en) 1995-02-10
CA2128811A1 (en) 1995-01-31
NO942807D0 (en) 1994-07-28
AU672506B2 (en) 1996-10-03
JPH0752794A (en) 1995-02-28
US5463963A (en) 1995-11-07
NO942807L (en) 1995-01-31
FI943534A (en) 1995-01-31
BR9402988A (en) 1995-04-11
AU6873994A (en) 1995-01-12

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