WO2018059932A1

WO2018059932A1 - Method for guiding a cab of a lift for simulating low gravity compared with earth gravity

Info

Publication number: WO2018059932A1
Application number: PCT/EP2017/072879
Authority: WO
Inventors: Sylvain Roumegas
Original assignee: Jodelroom
Priority date: 2016-09-29
Filing date: 2017-09-12
Publication date: 2018-04-05
Also published as: FR3056809A1; FR3056809B1

Abstract

The invention relates to a method for guiding a cab (21) of a lift (20) for simulating low gravity compared with earth gravity, comprising at least one motorised device for controlled lifting and lowering of the cab (21), characterised in that it comprises, upon detecting an emergency situation during the lifting of the cab (21) in the lift (20), an emergency stop phase comprising: a step (53) of decelerating the lifting of the cab (21) until the cab (21) reaches a lifting speed of zero or a positive lowering speed; followed by a step (56) of positive acceleration of the lowering of the cab (21); followed by a deceleration step (57), referred to as final deceleration step, of the cab (21) until the cab comes to a halt (21).

Description

METHOD FOR GUIDING AN ELEVATOR CAB

SIMULATION OF GRAVITY REDUCED IN RELATION TO GRAVITY

EARTHLY

The invention relates to a method for guiding a cabin of a gravity simulation elevator. It extends to a gravity simulation elevator with which a guide method according to the invention can be implemented.

Simulation of weightlessness is used in the context of scientific experiments or entertainment, especially in amusement parks so as to obtain weightlessness conditions in the presence of a gravitational field. The weightlessness simulation on a given body can be obtained when this body, placed in a mobile chamber, is propelled and that the mobile speaker reproduces the trajectory as close as possible to the gravitational trajectory of the propelled body.

A known means for simulating weightlessness is parabolic flight such as those made by commercial aircraft, for example by Airbus A300 ZERO-G. In particular, during a parabolic flight, the aircraft follows a parabolic trajectory so as to obtain weightlessness conditions as described in US2008 / 0078875. The main disadvantage of parabolic flight is that it is expensive, and is therefore not easily accessible to the general public.

The weightlessness simulation can also be obtained thanks to weightlessness tricks adapted to perform free falls so as to obtain weightlessness conditions. Nevertheless, in these towers the duration of fall, and therefore of the weightlessness simulation, is relatively short. In addition, given the different risks induced by a free fall (during the free fall and in the final deceleration phase) the gravity towers are generally used only to perform experimental tests on objects in the absence of human being .

In order to increase the duration of a simulation of weightlessness US2011 / 256512 proposes a vehicle guided vertically in relation to the ground, in a similar way to an elevator, so that individuals placed inside a cabin of the vehicle can experiment weightlessness during a climb phase and a phase of descent of the vehicle along vertical guides. To do this, similar to parabolic flights, the vehicle accelerates during the climb phase to 2g then is decelerated in a controlled manner to the top of the vertical guides and then descends in a controlled manner to achieve an acceleration of lg during the phase downhill. The passengers present in the vehicle experience weightlessness during deceleration after the climb phase until the controlled descent of the vehicle before the descent phase at lg. Nevertheless, the problem that arises with this type of device is also that of the safety of the passengers which must be in all circumstances assured and guaranteed. However, US2011 / 256512 does not raise this problem in any way and does not propose any corresponding solution.

In particular, the safety of the contents of the cabin, that is to say at least one body, must imperatively be assured and guaranteed when a problem is detected during operation of the elevator, such as a failure of an elevator element.

However, this safety problem arises even more than the position of each body experiencing zero gravity between the ceiling and the floor of the cabin is not known and that in particular a sudden braking of the cabin could cause a sudden shock of this body against the ceiling or floor of the cabin. In particular, during the cabin climbing phase, a simple deceleration of the cabin is not sufficient to avoid with certainty a sudden shock of the body against the ceiling of the cabin and against the floor of the cabin. Thus, a simple braking of the cabin does not reduce the risk of hurting passengers in such a simulated zero gravity lift cabin except to fasten them with seat belts.

However, the inventor has now determined that it is possible to ensure and guarantee the total safety of the bodies inside a cabin of a gravity simulation elevator only by appropriate guidance of the cabin without need to attach such bodies, including human passengers.

The invention therefore aims to overcome all these drawbacks and to propose a method for guiding an elevator car of reduced gravity simulation (in particular weightlessness) compared to the earth's gravity to ensure in all circumstances the safety of each body in this cabin and experimenting weightlessness.

The invention aims in particular to provide such a guiding method to avoid with certainty any sudden shock of each body present in the cabin with the latter.

The invention aims in particular to provide such a guide method which is compatible with an elevator car comprising no means of attachment of the bodies present in this cabin.

The aim of the invention is to propose such a guiding method making it possible to avoid the use of airbags and to provide human passengers with clothing and / or crash helmets.

The invention aims to provide such a simple guide method, reliable and fast enough operation.

The invention also aims at providing a simulation elevator of reduced gravity (in particular of weightlessness) with respect to the terrestrial gravity adapted to be able to implement a guiding method according to the invention as necessary.

The invention also relates to such an elevator having a simple and safe structure of each body present in a cabin of the elevator.

To do this, the invention relates to a method for guiding a elevator car of reduced gravity simulation with respect to the earth's gravity comprising at least one motorized device for controlled raising / lowering of the cabin,

characterized in that it comprises, following an emergency stop engagement during a rise of the cabin in the elevator, an emergency stop phase comprising:

a step of decelerating uphill of the cabin until the cabin reaches a zero climb speed or a positive descent speed, - then a step of positive acceleration down the cabin,

- Then a deceleration step - especially downhill - said last stage of deceleration, the cabin to a stop of the cabin.

The invention also extends to a simulation elevator of reduced gravity with respect to the Earth's gravity for the implementation of a guiding method according to the invention. It therefore also relates to a simulation elevator of reduced gravity with respect to the terrestrial gravity comprising a cabin and at least one motorized device for controlled up / down of the cabin characterized in that it comprises a control unit which, following a emergency stop interlocking when the car is mounted in the elevator, is programmed to:

applying at least one climb deceleration setpoint to at least one-each motorized up / down controlled device so as to reduce an uphill speed of the car until the car reaches a zero climbing speed or a positive speed downhill,

then to apply at least one downward positive acceleration instruction to at least one each motorized up / down device controlled so as to increase a speed of descent from the cabin,

and then to apply at least one deceleration setpoint -especially downhill- to at least one -particularly each- motorized up / down controlled device so as to reduce a speed of the car until the cab stops.

The invention also extends to a method of guiding a elevator cabin of reduced gravity simulation with respect to the Earth's gravity implemented with a gravity lift of reduced gravity compared to the Earth's gravity according to the invention.

The cabin comprises a void space between a ceiling and a floor of the cabin in which at least one body to experience a reduced gravity with respect to the earth's gravity can be installed. This body can be a being human or any other type of body. Thus, an elevator according to the invention makes it possible to simulate conditions of weightlessness or of any other gravity lower than earth's gravity such as Martian gravity in order to carry out scientific experiments on the bodies or be used as entertainment, particularly in amusement parks.

Said at least one motorized controlled up / down device allows controlled guidance up and down the elevator cabin according to a given speed and / or acceleration along a vertical axis with respect to the ground on which the elevator rests . In particular, said at least one motorized up / down controlled device is adapted to move the cabin between two altitudes defining the top and the bottom of the elevator.

During the emergency stop phase, the raising and lowering of the cabin is controlled by a control unit programmed to control the at least one motorized controlled rise / fall device by instructions it produces. The instructions can be electrical signals for example.

More particularly, advantageously and according to the invention, at least one-in particular each motorized device for controlled rise / fall of the cabin comprises:

at least two pulleys, a first pulley, called upper pulley, being placed at the top of the elevator and a second pulley, called lower pulley, being placed at the bottom of the elevator, each pulley having a rim hollowed out of a groove ,

at least one line extending partly in the groove of the lower pulley and the upper pulley, and having two ends attached to the elevator cabin,

- At least one motor adapted to drive in rotation at least one pulley motorized up / down controlled to cause the rise or fall of the cabin in a direction of rotation of the pulley. In particular, the engine of the motorized controlled up / down device can be chosen from the group consisting of electromagnetic motors, hydraulic motors and pneumatic motors.

More particularly, at least one pulley, called active pulley, in particular a lower pulley, of a motorized controlled up / down device is rotated by a transmission shaft which itself is driven by a motor of this motorized device. controlled climb / descent. This motor allows the rotation of the active pulley in two opposite directions so as to allow a sliding of the hanger and thus a rise and a descent of the cabin in the elevator in the direction of rotation of the active pulley. In addition, a pulley, called a passive pulley, in particular an upper pulley, of the same motorized controlled up / down device and connected by the suspension to the active pulley is guided in rotation only by the sliding of the suspension and therefore of the rotation. active pulley. Nevertheless, nothing prevents to have a line whose sliding is allowed through two active pulleys, including a lower pulley and a pulley above, the same motorized device up / down controlled. Nothing also prevents having a first motor driving the rotation of a lower pulley in a single direction of rotation and a second motor driving the rotation of an upper pulley, connected to the lower pulley by a hanger, in one direction opposite of rotation, the first and the second motor operating alternately to raise or lower the cabin in the elevator.

In certain advantageous embodiments, at least one lower pulley of a motorized controlled up / down device is an active pulley and at least one upper pulley of the same motorized downhill / controlled device is a passive pulley. Nevertheless, in certain other embodiments, at least one lower pulley of a motorized controlled up / down device is a passive pulley and at least one upper pulley of the same motorized downhill / controlled device is an active pulley.

According to at least one instruction applied to the motor by the control unit to at least one-in particular each motor of at least one -In particular each motorized device controlled rise / fall, the motor increases or reduces or maintains a rotational speed of at least one active pulley of this motorized device for controlled rise / fall. In particular, this instruction also indicates the direction of rotation to be applied to this active pulley. This instruction allows to increase or reduce or maintain the speed uphill or down the elevator cabin.

In some embodiments of the invention, the elevator is provided with a plurality of motorized controlled rise / fall devices. In particular, each motorized controlled up / down device comprises at least one hanger having a first end attached to a portion of the cabin wall opposite the top of the elevator and a second end attached to a portion of the passenger compartment wall. the cabin facing the bottom of the elevator. More particularly, the lines of the controlled climb / descent devices are attached to cab attachment points positioned to provide horizontal stability of the car in the elevator when the car is raised or lowered. . In addition, the use of several powered up / down controlled devices ensures a minimum safety of the elevator in case of failure of one of the components of the elevator (engine failure, breakage of a hanger ...). More particularly, the elevator preferably comprises at least two motorized controlled up / down devices.

In certain embodiments of the invention, the elevator also comprises non-motorized devices for raising / lowering the car. These non-motorized up / down devices therefore do not include a motor. In particular, in certain embodiments of the invention, a non-motorized up / down device comprises:

at least two pulleys, a first pulley, called upper pulley, being placed at the top of the elevator and a second pulley, called lower pulley, being placed at the bottom of the elevator, each pulley having a rim hollowed out of a groove , - At least one line extending partially in the groove of the lower pulley and the upper pulley, and having two ends attached to the elevator cab.

A non-motorized up / down device is thus guided by at least one motorized device for controlled raising / lowering of the car.

Furthermore, in certain embodiments according to the invention, the elevator also comprises fixed rails extending over a height of the elevator in which the car can be moved and on which the elevator car is mounted. In particular, the cabin is mounted on these rails so that the rails provide horizontal stability of the cabin during its guidance.

In particular, fixed rails can be used when the elevator comprises a single motorized controlled up / down device comprising a single hanger, a lower pulley and an upper pulley. In other embodiments, the elevator has rails and a plurality of motorized controlled rise / fall devices. In other embodiments, the elevator has rails and at least one motorized controlled rise / fall device and at least one non-motorized up / down device.

An elevator according to the invention can be mounted on natural and / or artificial bearing structures, in particular on tall buildings such as buildings, bridges, towers or structures dedicated solely to this lift such as a pillar for example.

Furthermore, in certain advantageous embodiments of the invention, at least one motorized controlled rise / fall device comprises at least one braking device adapted to reduce a rotational speed of at least one pulley of this motorized climbing device. / controlled descent.

In addition, the non-motorized up / down devices may also comprise braking devices that can be used in particular during the emergency stop phase of a guiding method according to the invention. Each braking device comprises at least one brake that can be selected from the group consisting of mechanical brakes, electromagnetic or other, including disc brakes, shoe brakes, eddy current brakes. A braking device may also comprise, in combination with brakes, a device for recovering mechanical energy from the elevator car.

Said control unit makes it possible, during a normal operating cycle of the elevator, to control at least one of each motorized controlled climb / descent device, in particular the direction and speed of rotation of at least one pulley. this motorized up / down controlled device by applying a setpoint to a motor associated with this pulley.

In particular, during the downward deceleration phase of a guiding method according to the invention, the control unit is programmed to control at least one braking device of the elevator (motorized controlled descent / descent devices and / or non-motorized up / down devices) to decelerate the elevator car. Preferably, the control unit comprises a first unit programmed to implement the normal operation of the elevator and a second unit programmed to implement the emergency stop phase. Nevertheless, nothing prevents having a single control unit adapted to control the motorized devices for controlled rise / fall during normal operation of the elevator and during an emergency stop phase.

Advantageously and according to the invention, the cabin comprises a first mattress, said upper mattress, defining at least a portion of a ceiling of the cabin and a second mattress, said lower mattress, defining at least a portion of a floor of the cabin.

The lower mattress and the upper mattress make it possible to cushion the shocks or even to guarantee against shocks between the bodies present in the cabin and the ceiling or the floor of the cabin. In certain advantageous embodiments according to the invention, the emergency stop phase is performed following an emergency stop engagement occurring when a ratio between a total mechanical energy (kinetic and potential) of the cabin and a maximum total mechanical energy of the car that can be reached when the car reaches a maximum height of the car in the elevator is greater than or equal to 0.3.

A guiding method comprises an emergency stop phase following an emergency stop engagement during a phase of raising the car in the elevator during normal operation of the elevator. In particular, the normal operation of the elevator comprises a first phase of raising the car in the elevator and then a descent phase of the car in the elevator. In particular, during normal operation of the elevator, the cabin follows a vertical path relative to a floor on which the elevator is placed. The cab up phase starts from a boarding area allowing the corpses to experience reduced gravity (including weightlessness) relative to earth's gravity entering the cabin. In addition, the cabin height as a function of time during normal operation follows a parabolic variation function.

An emergency situation is detected, for example, when a defect or a deflection of control parameters, such as exceeding a speed limit of the car, is detected or when a failure of a motorized device of controlled climb / descent makes critical of other remaining controlled downhill motorized devices or malfunction of the normal operation control unit or when an emergency stop instruction is triggered manually by an operator. An emergency situation is also detected when the elevator car exceeds a predefined threshold height when the car is lowered into the elevator or a predefined ceiling height when raising the car in the elevator. In particular, the threshold height and the ceiling height are between the top and bottom of the elevator.

Sensors can be used to detect an emergency situation. The emergency stop phase includes a step of decelerating uphill of the car by reducing the speed of the uphill car until the uphill speed of the car is zero or until a speed of the positive cabin downhill. Indeed, at the end of the deceleration step uphill, the speed of the cabin becomes zero and the cabin can go down slightly in the elevator so as to have a positive cabin speed downhill. For example, the descent speed of the car at the end of the uphill deceleration stage is 0.1 m-s ^"1. For this purpose, during the uphill deceleration stage, at least one instruction The ramping deceleration is applied by the control unit to at least one motorized controlled climb / descent device, more particularly this setpoint makes it possible to obtain a deceleration in the climb of the cabin greater than 1 g.

In addition, during the step of deceleration uphill of the cabin, the speed of the cabin is reduced thanks to at least one braking device of at least one motorized device controlled up / down and / or at least a braking device of at least one non-motorized climbing / lowering device.

In particular, in certain embodiments according to the invention, the step of climbing deceleration comprises:

a first substep of deceleration up the cabin,

and then a second sub-step of deceleration up the cabin during which the cabin undergoes a reduction of a higher uphill speed of the cabin to a reduction of a car uphill speed during the first sub-stage. deceleration stage uphill, until the car reaches a zero climb speed or a positive descent speed.

Nevertheless, the uphill deceleration step includes only the first uphill deceleration substep when the first uphill deceleration substep begins when the car speed is low enough that deceleration of the car during this deceleration. first substep of deceleration uphill allows to quickly obtain a zero speed of the cabin. More particularly, in certain embodiments according to the invention, the first deceleration substep ends when a contact is detected between at least one-in particular each body present in the elevator cabin and a mattress, said upper mattress, defining at least a portion of a ceiling of the cabin.

As the car climbs into the elevator, each body in the cabin can be projected upward to experience reduced gravity (including weightlessness) relative to Earth's gravity. The first deceleration sub-step makes it possible to bring the said at least one projected body upwards against the upper mattress, avoiding a brutal shock of the said at least one body against the upper mattress in the case of a sudden deceleration of the elevator. . Nevertheless, the first substep may stop before said at least one body comes into contact with the upper mattress, in particular when the cabin reaches a zero climb speed or a positive descent speed before said at least one body returns. in contact with the upper mattress.

When the first deceleration sub-step does not allow to reach a zero climb speed or a positive descent speed of the cabin, the second deceleration sub-step then makes it possible to increase the deceleration of the cabin to quickly reach a zero speed, said at least one body being always in contact with the upper mattress. Thus, the step of decelerating uphill of the elevator makes it possible to rapidly reduce the speed of the elevator by taking into account said at least one body projected upwards so as to avoid a sudden shock of said at least one body against the upper mattress.

The booth may include sensors, such as pressure sensors and / or proximity sensors, for detecting contact between at least one body and the upper mat.

Nevertheless, nothing prevents the first sub-deceleration step from ending when a predefined period has elapsed from the beginning of the first deceleration substep.

In particular, in certain advantageous embodiments according to the invention, at least one climb deceleration instruction is applied. during the first substep of deceleration uphill by a control unit to at least one-in particular each motorized up / down controlled device so as to obtain a reduction of a cabin upshift speed greater than 9,807 m - s ^"2 , for example between 10 m- s ^{" 2} and 20 m- s ^"2 , in particular of the order of 15 m- s ^{" 2} . In addition, in certain advantageous embodiments according to the invention, at least one climbing deceleration instruction is applied during the second substep of deceleration upwards by a control unit to at least one-in particular each motorized device. controlled raising / lowering so as to obtain a reduction in a cabin climbing speed of between 15 m.sup.- ² and 50 m.sup.- ² , in particular of the order of 30 m.sup.- ² .

At the end of the uphill deceleration stage each body present in the cabin undergoes the force of gravity so that it is caused to fall towards the floor of the cabin. In order to avoid a sudden shock of these bodies against the lower mattress, the step of positive acceleration downhill to dampen the fall of these bodies guiding the cabin so that it accompanies the bodies in their fall downhill at a positive descent acceleration of less than 1 g so as to have a cabin descent speed slightly lower than a falling speed of these bodies present in the cabin. The step of positive acceleration downhill thus allows to bring said at least one body against the lower mattress avoiding a sudden impact of said at least one body against the lower mattress. For this purpose, during the step of positive acceleration during descent, at least one descent acceleration instruction is applied by a control unit to at least one-in particular each motorized up / down device controlled so as to increase a speed down the cabin.

Thus, advantageously and according to the invention, the step of positive acceleration downhill ends when a contact is detected between at least one-in particular each body present in the cabin of the elevator and a mattress, said lower mattress defining at least a portion of a floor of the cabin.

The booth may include sensors, such as pressure sensors and / or proximity sensors, for detecting contact between at least one body and the lower mat. Nevertheless, nothing prevents the end of the step of positive acceleration downhill when a predefined period has elapsed from the beginning of the first sub-deceleration step.

The maximum speed of the car reached during the step of positive acceleration in descent is between 0 ms ^-1 and 18 ms ^-1 , in particular of the order of 4 to 10 ms ^-1 .

In particular, in certain advantageous embodiments according to the invention, at least one downhill acceleration command is applied during the downward positive acceleration step by a control unit to at least one-in particular each device. motorized up / down controlled so as to obtain an increase in a speed of descent from the cabin of between 1 m-s ^"2 and 10 m-s ^{" 2} , in particular of the order of 5 m-s ^"2 .

Said last stage of deceleration of the cabin makes it possible to stop the cabin, each body present in the cabin remaining in contact with the lower mattress until the stopping of the cabin. To do this, during said last deceleration step, at least one descent acceleration set point is applied by a control unit to at least one-in particular each motorized controlled up / down device so as to reduce a speed of rotation. the cabin.

In addition, during said last deceleration step, the speed of the cabin is reduced thanks to at least one braking device of at least one motorized controlled climb / descent device.

More particularly, in certain advantageous embodiments according to the invention, at least one downhill deceleration set point is applied during said last deceleration step by a control unit to at least one-in particular each motorized up / down device. controlled so as to obtain a reduction of a speed - especially downhill - of the cabin between 5 ms- ² and 15 ms- ² , in particular of the order of 10 ms- ² .

This last deceleration step is preferably performed down the cabin in the elevator. Nevertheless, nothing prevents to achieve this last stage of deceleration uphill of the cabin, if following the step of positive acceleration downhill, the cabin is driven uphill.

The cabin can then be returned to the boarding area so as to disembark from the cabin each body - especially every passenger - present in the cabin.

Thus, advantageously and according to the invention, during the emergency stop phase and more particularly from the beginning of the deceleration step uphill until the end of the positive acceleration step downhill, the acceleration of the cabin is always negative and non-zero compared to the direction of the rise of the cabin (vector acceleration directed towards the bottom of the elevator).

A guidance method according to the invention therefore makes it possible to quickly stop an elevator car in its climb phase while taking into account that said at least one body experiences a reduced gravity with respect to the Earth's gravity during this phase of mounted so as to avoid shocks between said at least one body and the ceiling and floor of the cabin.

A guidance method according to the invention thus makes it possible to guide a simulated elevator cabin of reduced gravity with respect to the earth's gravity while guaranteeing the safety of the passengers. In addition, a guiding method according to the invention makes it possible to refrain from attaching said at least one body in the cabin so that it can experience a reduced gravity with respect to earth gravity freely in the cabin of the cabin. 'elevator.

A guiding method according to the invention is simple, reliable and safe.

An emergency stop phase during a descent phase of the cabin can also be performed after an emergency stop engagement by reducing the speed of descent from the cabin to the stopping of the cabin. The speed can for example be reduced by a deceleration of between 25 m.sup.- ² and 50 m.sup.- ² , in particular of the order of 39 m.sup.- ² .

An emergency stop phase, called the low-energy emergency stop phase, during a cab-up phase can also be carried out after an emergency stop activation when the cabin is up and that energy total mechanical cabin is not sufficient to engage an emergency stop phase according to the invention. The emergency stop phase then consists in slightly reducing the uphill speed of the car until the stopping of the car so as to keep the at least one body in contact with the lower mattress. The speed can for example be reduced by a deceleration lower than the normal value of the acceleration of gravity, or approximately 9.807 m-s ^"2 , in particular of the order of 7 m-s ^{" 2} .

The invention also relates to a method for guiding a lift cabin of reduced gravity simulation with respect to the Earth's gravity and a gravity lift reduced in relation to the Earth's gravity characterized in combination by all or some of the characteristics. mentioned above or hereafter.

Other objects, features and advantages of the invention will appear on reading the following non-limiting description which refers to the appended figures in which:

FIG. 1 is a diagrammatic front view of a gravitational lift of reduced gravity with respect to earth's gravity according to a first embodiment according to the invention,

FIG. 2 is a diagrammatic side view of the simulated gravity lift reduced with respect to the Earth's gravity of FIG. 1;

FIG. 3 is a diagrammatic front view of a gravity elevator of reduced gravity with respect to earth's gravity according to a second embodiment according to the invention,

FIG. 4 is a schematic view from above of the elevator of simulation of gravity reduced with respect to the terrestrial gravity of FIG. 3,

FIG. 5 is a representative graph of a normal operation of a method of guiding a elevator car of simulation of gravity reduced with respect to the Earth's gravity,

FIG. 6 is a sequential diagram of an emergency stop phase of a guidance method according to the invention. A lift 20 of gravity simulation reduced with respect to the Earth's gravity according to the invention, represented in a first embodiment in FIGS. 1 and 2 and in a second embodiment in FIGS. 3 and 4, comprises a cabin 21. cabin 21 comprises a wall delimiting an internal space of the cabin 21. In addition, the internal space comprises a void space between a ceiling and a floor of the cabin 21 in which can be installed at least one body to experience a reduced gravity by relative to Earth's gravity, and in particular weightlessness in the embodiments shown. This body can be a human being or any other type of body. In the embodiments shown, the bodies present in the cabin 21 are human passengers.

In the embodiments shown, the wall of the cabin 21 has a parallelepiped shape. The wall thus comprises an upper wall 34 facing the top of the elevator 20 and a lower wall 35 facing the bottom of the elevator 20. Nevertheless, the wall of the cabin 21 may have any shape.

The cabin 21 is equipped with a first mattress, said upper mattress 24, defining at least a portion of a ceiling of the cabin 21 and a second mattress, said mattress 23 below, defining at least a portion of a floor of the cabin 21. The cabin 21 may also include mattresses on the lateral sides of the cabin 21 between the ceiling and the floor of the cabin 21. The mattresses allow to cushion the shocks or to guarantee against shocks between the bodies present in the cabin 21 and the ceiling, the floor and the lateral sides of the cabin 21.

The lower mat 23 is spaced from the upper mattress 24 by a distance greater than or equal to 60 cm for example, more particularly of the order of 2 meters.

The cabin 21 may comprise at least one sensor, said contact sensor with the upper mattress 24, such as a pressure sensor and / or a proximity sensor, in order to detect a contact between at least one body, in particular at least one passenger 22, and the upper mattress 24. In addition, the cabin 21 may also comprise at least one sensor, said contact sensor with the lower mat 23, such as a pressure sensor and / or a proximity sensor, to detect a contact between at least one body, including at least one passenger 22, and the lower mattress 23.

When the cabin 21 is at a standstill, the passengers 22 of the cabin 21 are positioned on the lower mat 23, in particular in an extended position.

In particular, the elevator 20 comprises a boarding area adapted so that the passengers 22 can enter the cabin 21. At the beginning and at the end of a normal operating cycle of the elevator 20, the cabin 21 is positioned in the boarding area.

The elevator 20 also comprises at least one motorized controlled rise / fall device. This motorized up / down controlled device is adapted to raise and lower the cabin 21 of the elevator 20 along an axis vertical with respect to the ground on which the elevator 20 rests. In particular, this motorized up / down device controlled is adapted to move the cabin 21 between two altitudes defining the top and bottom of the elevator 20.

In particular, the elevator 20 shown in FIGS. 1 and 2 comprises a single motorized controlled climb / descent device.

Each motorized controlled climb / descent device comprises two pulleys. A first pulley, called the upper pulley 26, is placed at the top of the elevator 20 and a second pulley, called the lower pulley 27, is placed at the bottom of the elevator 20, each pulley having a rim dug out of a groove. Each pulley has an axis of rotation orthogonal to the vertical axis of the elevator 20. In particular, the upper pulley 26 is assembled to a yoke 28 fixed to a support 30 at the top of the elevator 20. In addition the pulley 27 lower end is assembled to a yoke 29 fixed to a support 31 at the bottom of the elevator 20. Nevertheless, nothing prevents to have a motorized device 25 up / down controlled with more than two pulleys.

Each powered up / down controlled device also includes a hanger 32 having a first end and a second end attached to the booth 21. The hanger 32 extends between its two ends. ends in the groove of the lower pulley 27 and in the groove of the lower pulley 27 to form a closed loop with the cabin 21. In particular, the ends of the hanger 32 are attached to points 33 of attachment of the These attachment points 33 are preferably placed on the upper wall 34 and the lower wall of the cabin 21.

More particularly, the cabin 21 of the elevator 20 shown in FIGS. 1 and 2 has a first attachment point 33 placed on the upper wall 34 of the cabin 21 and in the center of this wall on which is attached a first end of the suspension 32 and a second attachment point 33 placed on the bottom wall of the cabin 21 and in the center of this wall on which is attached a second end of the hanger 32.

In addition to the motorized controlled ascending / descending devices, the elevator 20 may also comprise at least one non-motorized device 61 for raising / lowering the car, as shown in FIG. 4.

Each non-motorized up / down device 61 comprises:

- At least one line extending partially in the groove of the lower pulley and the upper pulley, and having two ends attached to the elevator cab.

Each non-motorized up / down device 61 is thus guided by at least one motorized device 25 for controlled raising / lowering of the car.

Such non-motorized up / down devices 61 can be used to improve the horizontal stability of the car. In particular, the elevator 20 shown in FIGS. 3 and 4 comprises two motorized controlled up / down devices and four non-motorized up / down devices 61.

In addition, the cabin 21 of the elevator 20 shown in FIGS. 3 and 4 has six attachment points 33 placed on the upper wall 34 of the cabin 21 and six attachment points 33 placed on the lower wall of the cabin. 21. Four of the six points 33 for attaching the upper wall 34, respectively the lower wall, of the cabin 21 are placed at the four corners of the upper wall 34, respectively of the lower wall, of the cabin 21 and are assembled to the lines of the 61 non-motorized devices of up / down. The other two attachment points 33 are placed between two attachment points 33 on two opposite sides of the lower face 34 and the upper face of the cabin 21 and are connected to the lines of the motorized controlled rise / fall devices. . Alternatively, the attachment points 33 may be placed near a vertical axis passing through the center of gravity of the cabin.

Each line of the lift is a traction cable that can be of any kind and any material to withstand the usual mechanical stresses occurring in known lifts.

In the embodiment shown in FIGS. 3 and 4, a suspension tension regulator 32 is placed on each of the lower pulleys 27 of each motorized up / down device controlled in such a way as to keep the hanger 32 stretched in the throat these lower pulleys 27 and maintain a desired tension in the hanger 32.

Each motorized up / down controlled device comprises a device 60 for ascending / lowering the cabin 21. The up / down control device 60 comprises at least one motor 36 adapted to rotate a pulley, called an active pulley. , the motorized device for controlled rise / fall. To do this, a transmission shaft 37 is placed between the motor 36 and the active pulley so as to transmit a torque of the motor 36 to the active pulley. The up / down control device 60 also comprises a mechanical gearbox 38 placed between each motor 36 and the transmission shaft 37 associated with the motor 36 so as to be able to modify the torque ratio between the motor 36 and the transmission shaft 37.

The motor 36 of the controlled rise / fall control device 60 may be selected from the group consisting of electromagnetic motors, hydraulic motors and pneumatic motors.

The rotation of the active pulley allows the sliding of the hanger 32 causing a rotation of at least one other pulley, called passive pulley, domotic device of controlled rise / fall. In particular, the lower pulley 27 of the elevator 20 shown in FIGS. 1 and 2 is the active pulley and the upper pulley 26 is the passive pulley.

At least one up / down control device 60 also comprises at least one braking device 39. Each braking device 39 comprises at least one brake which may for example be selected from the group consisting of disc brakes, shoe brakes and eddy current brakes. A braking device 39 may also comprise, in combination with brakes, a device for recovering mechanical energy from the cabin 21 of the elevator 20.

Moreover, the use of several motorized controlled up / down devices makes it possible to ensure a minimum safety of the elevator 20 in the event of failure of one of the components of the elevator 20 (failure of an engine 36, rupture of a hanger 32 ...).

More particularly, the lines 32 of the powered up / down controlled devices are attached to cab attachment points 21 positioned to provide horizontal stability of the cab 21 in the elevator 20 when climbing or from the descent of the cabin 21.

In the embodiment shown in FIGS. 1 and 2, the elevator 20 also comprises two fixed rails 59 extending over a height of the elevator 20 in which the cabin 21 can be moved and on which the cabin 21 of the elevator 20 is mounted. The rails 59 make it possible to ensure horizontal stability of the cabin 21. In addition, as an alternative to the embodiment shown in FIGS. 3 and 4, the elevator may comprise rails 59 complement motorized devices 25 up / down controlled and 61 non-motorized devices up / down.

The elevator 20 also comprises a control unit 40. The control unit 40 comprises at least one processor and / or one microprocessor and / or at least one microcontroller. This control unit 40 is programmed to control at least one motorized controlled rise / fall device, in particular the direction and speed of rotation of at least one pulley of this motorized up / down device controlled by applying a setpoint to a motor 36 associated with this pulley. The control unit 40 can be centralized so as to be able to control all the motorized devices for controlled raising / lowering of the elevator. Alternatively, each up / down control device 60 may include a control unit 40 programmed to control only that up / down control device 60.

Thus, the control unit 40 makes it possible to control at least one motorized controlled rise / fall device during a normal operating cycle of the elevator 20. The control unit 40 can also control the motorized device 25 of the elevator. controlled climb / descent during an emergency stop phase.

In addition during an emergency stop phase, the control unit 40 can also be programmed to control a braking device of at least one braking unit 41 dedicated solely to emergency braking of the cabin 21. In particular, the shaft of at least one motorized controlled rise / fall device may be connected to a braking device of such a braking unit. In addition, braking devices of other braking units 41 may be connected to non-motorized up / down devices 61 to provide emergency braking of the elevator car. In particular, such braking units 41 may comprise control units 40 programmed to control the braking device of a non-motorized up / down device 61 connected to this braking unit 41. Preferably, the control unit 40 comprises a first unit programmed to implement the normal operation of the elevator and a second unit programmed to implement the emergency stop phase. However, nothing prevents having a control unit formed of a single unit programmed to control the motorized devices controlled up / down during normal operation of the elevator 20 and during a stop phase of 'emergency.

An emergency situation is detected, for example, when a defect or deflection of control parameters, such as exceeding a speed limit of the car, is detected or when a failure of a motorized device is detected. Controlled up / down movement makes critical of other remaining controlled downhill motor devices or malfunction of said first normal operation control unit or when an emergency stop instruction is triggered manually by an operator. An emergency situation is also detected when the cabin 21 of the elevator 20 exceeds a predetermined threshold height during the descent of the cabin 21 in the elevator 20 or a predefined ceiling height when the cabin 21 is raised in the elevator. In particular, the threshold height and the ceiling height are between the top and the bottom of the elevator.

More particularly, sensors, called emergency detection sensors, not shown, can detect such an emergency situation. In particular, these emergency detection sensors are connected electrically or numerically to the processing unit and / or to a monitoring unit that is not shown. Such emergency situation detection sensors may be sensors for position and / or speed and / or acceleration of the cabin. For example, the detection sensors may be chosen from the group consisting of accelerometers, optical, electromagnetic, electrical, microwave and infrared sensors. In particular, the monitoring unit is programmed to signal to the control unit 40 that an emergency situation has been detected so that the control unit 40 can implement an emergency stop phase. Figure 5 shows a normal operating cycle of an elevator according to the invention. In particular, FIG. 5 shows, on the y-axis as a function of time, expressed in seconds on the abscissa axis:

- the height 49 of the cabin,

- the vertical speed 50 of the cabin,

a height 51 relative to the total mechanical energy of the cabin 21,

- acceleration 48 felt by passengers 22.

In particular, the height relative to the total mechanical energy of the cabin can be calculated by the formula: H _E = where E _T is the total mechanical energy of the cabin, g is the normal value of the acceleration of gravity , ie approximately 9,807 m-s ^"2 and m is the mass of the car, ie 500 kg in the example given In addition, the acceleration felt can be calculated by the formula: Acc _r = ACC + g, where ACC is the acceleration of the cabin and g is the normal value of the acceleration of gravity, the height is expressed in meters, the vertical speed in km-h ^"1 , the height relative to the total mechanical energy in meters and the the acceleration felt in ms ² multiplied by a factor 100. A normal operating cycle comprises a stage 42 for raising the cabin 21 in the elevator 20 and then a stage 45 for lowering the cabin 21 in the elevator 20 cabin 21 can in this example climb to an altitude of 120 m.

The rise phase 42 includes a phase, called the energization phase 43, during which the speed of rise of the car is accelerated so as to increase the total mechanical energy of the car. In particular, during the energization phase 43, each motorized controlled rise / fall device applies a setpoint transmitted to them by the control unit 40 so as to mount the cabin 21 in the elevator 20 according to FIG. vertical axis of the elevator 20 being accelerated upwardly to reach a climb speed greater than 28 m -s- ¹ , for example of the order of 40 m-s ^-1 , and a maximum acceleration greater than 15 m-s ^"2 , in particular of the order of 25 m-s ^{" 2} . For example, the phase 43 of energization makes it possible to mount the cabin 21 at a height of 50 meters compared to the boarding area and lasts 3 seconds. This phase 43 energizing uphill extends for example over 2 seconds.

Then a phase, called phase 44 of weightlessness, takes place during the rise phase 42 and partly during the descent phase 45. During the weightlessness phase 44, the total mechanical energy of the cabin is stabilized by decelerating the car uphill speed to lg until the car reaches zero speed and then the descent speed of the car is accelerated to 1 g so that the cabin follows a function of parabolic variation over time associated with earth's gravity. Thus, passengers 22 experience weightlessness during this weightless phase 44. In particular, during this weightlessness phase 44, each motorized up / down device 25 firstly applies a setpoint transmitted to them by the normal operation control unit 40 so as to decrease the climbing speed. of the cabin 21 until the climbing speed reaches a zero speed at the top of the elevator 20, in particular at a height of the order of 125 m. This deceleration uphill extends over a duration for example of the order of 3.5 seconds.

Then, each motorized controlled up / down device first applies a setpoint transmitted to them by the normal operation control unit 40 so as to lower the cabin 21 in the elevator 20 along the vertical axis of the elevator. the elevator 20 being accelerated until reaching a descent speed greater than 28 m -s- ¹ , for example of the order of 40 m-s ^-1 , and a maximum acceleration greater than 15 m-s ^"2 , in particular of the order of 25 m-s ^"2 . The descent acceleration extends over a duration for example of the order of 3.5 seconds and allows for example to lower the cabin 21 to a height of 50 m.

The phase 44 of weightlessness therefore extends for example over 7 seconds.

Following phase 44 weightlessness, the phase 45 of descent of the cabin 21 in the elevator 20 comprises a phase, called phase 46 of deenergization, during which the total mechanical energy of the cabin is reduced to be nothing. In particular, during phase 46 of deenergization, each motorized controlled rise / fall device applies a setpoint transmitted to them by the control unit 40 so as to reduce the speed of descent of the cabin 21 until the descent speed reaches a zero speed in the zone boarding.

This downward deceleration phase 47 extends for example over 2 seconds.

Thus, during a normal operating cycle, more particularly during phase 44 weightlessness, the height of the cabin 21 follows a function of parabolic variation over time.

A guiding method comprises an emergency stop phase, represented in FIG. 6, following an emergency stop engagement 52 during the rise phase 42 of the normal operating cycle of the elevator 20. In FIG. in particular, the emergency stop phase is performed following an emergency stop activation occurring when a ratio between a total mechanical energy of the cabin 21 and a maximum total mechanical energy of the cabin 21 that can be reached when the cabin 21 arrives at a maximum height of rise of the cabin 21 in the elevator 20 is greater than 0.3. This total mechanical energy is in particular reached at the end of the energization phase 43 and during phase 44 of weightlessness.

An emergency stop 52 can be performed manually by an operator or automatically by the control unit or the monitoring unit. In particular, an emergency stop engagement 52 is performed when an emergency situation is detected by the emergency detection sensors.

The emergency stop phase includes first a step

53 of deceleration uphill of the cabin 21 until the cabin 21 reaches a zero speed or a positive speed downhill. In particular, the step 53 of deceleration uphill comprises a first substep 54 of deceleration uphill of the cabin 21.

In particular, at least one climb deceleration instruction is applied during the first substep 54 of deceleration uphill by a control unit 40 to the motorized controlled rise / fall devices and / or to the non-motorized up / down devices 61 so as to obtain a reduction in an uphill speed of the cabin 21, for example between 10 m. s ^"2 and 20 m-s ^{" 2} , in particular of the order of 15 m-s ^"2 .

At the time of an emergency situation detection during the weightlessness phase 44 or at the end of the energization phase 43, each passenger 22 generally experiences zero gravity. The first sub-step 54 of deceleration makes it possible to bring each passenger 22 up against the upper mattress 24 avoiding a sudden shock of each passenger 22 against the upper mattress 24 in the case of a sudden deceleration of the elevator 20 .

More particularly, the first deceleration substep 54 terminates when a contact is detected by at least one contact sensor with the lower mattress 23 between each passenger 22 present in the cabin 21 of the elevator 20 and a mattress, said upper mattress 24, defining at least a portion of a ceiling of the cabin 21.

Nevertheless, nothing precludes completing the first deceleration sub-step 54 when a predefined period has elapsed from the beginning of the first deceleration sub-step 54.

In addition, the first sub-step 54 of climbing deceleration is followed by a second substep 55 of the deceleration up of the cabin 21 of the step 53 of deceleration uphill. During the second substep 55 of upward deceleration, the cabin 21 undergoes a reduction of an upward speed of the cabin 21 greater than a reduction of an uphill speed of the cabin 21 during the first substep 54 deceleration uphill, until the cabin 21 reaches a zero speed or a positive speed downhill. Indeed, at the end of step 53 of deceleration uphill, the speed of the cabin 21 becomes zero and the cabin 21 can descend slightly in the elevator 20 so as to have a cabin speed of 21 positive downhill. For example, the descent speed of the booth 21 at the end of the climb deceleration step 53 is 0.1 ms ^-1 .

More particularly, at least one climb deceleration instruction is applied during the second deceleration sub-stage 55. mounted by the control units 40 to the motorized controlled rise / fall devices and / or the non-motorized up / down devices 61 so as to obtain a reduction in an uphill speed of the car 21 between 15 m-s ^"2 and 50 m-s ^{" 2} , in particular of the order of 30 m-s ^"2 .

The second sub-step 55 deceleration increases the deceleration of the cabin 21 to quickly reach zero speed, each passenger 22 is always in contact with the upper mattress 24. Thus, the step 53 of deceleration of the elevator 20 allows to quickly reduce the speed of the elevator 20 taking into account the position of each passenger 22 so as to avoid a sudden shock of each passenger 22 against the mattress 24 superior.

In particular, the climb deceleration step 53 only comprises the first climbing deceleration sub-step 54 when the first climbing deceleration substep 54 starts when the speed of the cab 21 is low enough so that the deceleration of the deceleration the cabin 21 during this first substep 54 of climbing deceleration makes it possible to quickly obtain a zero speed of the cabin 21.

At the end of the uphill deceleration stage 53, each passenger 22 present in the cabin 21 undergoes the force of gravity so that it is caused to fall towards the floor of the cabin 21. In order to avoid a sudden shock of these passengers 22 against the lower mat 23, the step 53 of deceleration uphill is followed by a step 56 of positive acceleration downhill from the cabin 21. This step 56 of positive acceleration downhill can dampen the these passengers 22 fall by guiding the cabin 21 so as to accompany the passengers 22 in their fall down at a speed slightly lower than a speed of fall of these passengers 22 present in the cabin 21. The step 56 of positive acceleration downhill allows to bring each passenger 22 against the lower mat 23 avoiding a brutal shock of each passenger 22 against the lower mat 23. To do this, during step 56 of positive acceleration downhill, at least one downhill acceleration command is applied during step 56 of positive acceleration downhill by the control units 40 to the devices 25 motorized up / down controlled and / or devices 61 non-motorized up / down so as to obtain an increase in a speed down cabin 21 for example between 1 m- s ^"2 and 8 m- s ^"2 , in particular of the order of 5 m-s ^{" 2} .

The maximum speed of the cabin 21 reached during step 56 of positive acceleration in descent is between 0.7 m -s- ¹ and 12 m-s ^-1 , in particular of the order of 4.5 m. s ^"1 .

Thus, advantageously and according to the invention, the downwardly positive acceleration step 56 ends when a contact is detected by at least one contact sensor with the lower mattress 23 between each passenger 22 present in the cabin 21 of the passenger compartment. elevator 20 and a mattress, said lower mat 23, defining at least a portion of a floor of the cabin 21.

Nevertheless, nothing prevents completion of the downward positive acceleration step 56 when a predefined period has elapsed from the beginning of the first deceleration sub-step 54.

The step 56 of positive acceleration downhill is followed by a last step 57 of deceleration down from the cabin 21 to the stopping of the cabin 21.

The last stage 57 of deceleration of the cabin 21 makes it possible to stop the cabin 21, each passenger 22 present in the cabin 21 remaining in contact with the lower mat 23 to the stop 58 of the cabin 21. To do this, when of the last deceleration step 57, at least one downhill deceleration set point is applied during the last deceleration step 57 by the control units 40 to the motorized controlled climb / descent devices and / or to the non-motorized devices 61 of up / down so as to obtain a reduction of a downward speed of the cabin 21, for example between 5 m -s ^"2 and 15 m -s ^{" 2} , in particular of the order of 7 m-s ^"2 .

In addition, during the last deceleration step 57, the speed of the cab 21 is reduced by means of at least one braking device 39 of at least one motorized controlled up / down device and / or a control device. braking a unit 41 emergency braking. The cabin 21 can then be returned to the boarding area so as to disembark from the cabin 21 each passenger 22 present in the cabin 21.

A guidance method according to the invention therefore makes it possible to quickly stop an elevator cabin 20 in its climb phase 42 while taking into account that the passengers 22 experience weightlessness during this climb phase 42 so as to avoid shocks between the passengers 22 and the ceiling and the floor of the cabin 21. A guiding method according to the invention is simple, reliable and safe.

An emergency stop phase during a phase 45 of descent from the cabin 21 can also be performed after an engagement 52 of emergency stop by reducing the speed of descent from the cabin 21 to the stop The speed can, for example, be reduced by a deceleration of between 25 m.sup.- ² and 50 m.sup.- ² , in particular of the order of 39 m.sup.- ² .

An emergency stop phase, called the low energy emergency stop phase, during a stage 42 of raising of the cabin 21 can also be carried out after an engagement 52 of emergency stop uphill and that the total mechanical energy of the cabin 21 is not sufficient to trigger an emergency stop phase according to the invention. The emergency stop phase then consists in slightly reducing the uphill speed of the cabin 21 until the cabin 21 stops. The speed can for example be reduced by a deceleration of between 1 m-s ^"2 and 10 m-s ^"2 , in particular of the order of 7 m-s ^{" 2} .

The invention therefore relates to a gravity simulation elevator 20 for implementing a method for guiding a elevator simulator elevator cabin 20 comprising an emergency stop phase enabling stopping the cabin 21 ensuring the safety of the passengers 22 after an engagement 52 of emergency stop during a phase 42 of raising the cabin 21 in the elevator 20.

The invention can be the subject of numerous variants with respect to the embodiments described above and represented on the figures. In particular, a gravity simulation elevator 20 may comprise several cabins 21.

A gravity simulation elevator 20 makes it possible to simulate conditions of weightlessness or any other reduced gravity with respect to terrestrial gravity, such as Martian gravity, in order to carry out scientific experiments on the bodies or be used as entertainment especially in amusement parks. In addition, such an elevator 20 is adapted to guarantee the safety of passengers 22 of an elevator cabin 20 in the event of an emergency situation by implementing an emergency stop phase of a guidance method. according to the invention. In particular, an elevator 20 according to the invention can be mounted on natural and / or artificial bearing structures, in particular on tall buildings such as buildings, bridges, towers or structures dedicated solely to this lift. such as a pillar for example.

Claims

1 / - Method for guiding an elevator cabin (21) of reduced severity simulation with respect to earth's gravity, comprising at least one motorized controlled up / down device of the car (21), characterized in that what it understands, following an emergency stop engagement during a rise of the cabin (21) in the elevator (20), an emergency stop phase comprising:

a step (53) for decelerating uphill of the car (21) until the car (21) reaches a zero climb speed or a positive descent speed,

- then a step (56) positive acceleration down the cabin (21),

- And a deceleration step (57), said last stage of deceleration, the cabin (21) to a stop of the cabin (21).

21 - Method according to claim 1, characterized in that the step (53) of climbing deceleration comprises:

a first sub-step (54) for decelerating uphill of the cabin (21),

- then a second sub-stage (55) of deceleration in the cabin (21) during which the cabin (21) undergoes a reduction in a cabin upward speed (21) greater than a reduction of one upward speed of the car (21) during the first uphill deceleration substep (54), until the car (21) reaches a zero climb speed or a positive descent speed.

3 / - Method according to claim 2, characterized in that the first substep (54) of deceleration uphill terminates when a contact is detected between at least one body (22) present in the cabin (21) of the elevator (20) and a mattress (24), said upper mattress, defining at least a portion of a ceiling of the cabin (21).

4 / - Method according to one of claims 1 to 3, characterized in that the step (56) positive acceleration downhill ends when contact is detected between at least one body (22) present in the cabin (21) of the elevator (20) and a mattress (23), said lower mattress, defining at least a portion of a floor of the cabin (21). ).

5 / - Method according to one of claims 2 to 4, characterized in that at least one climb deceleration instruction is applied during the first substep (54) of deceleration uphill by a unit (40) of controlling at least one motorized up / down controlled device so as to obtain a reduction in a cabin upward speed (21) of greater than 9,807 m-s ^"2 .

6 / - Method according to one of claims 2 to 5, characterized in that at least one climb deceleration instruction is applied during the second substep (55) of deceleration uphill by a unit (40) of control at least one powered device ascent / descent controlled so as to obtain a reduction of a velocity in the cabin mounted (21) between 15 m s - ^"2 and 50 m s ^-" 2.

II - Method according to one of claims 1 to 6, characterized in that at least a descent acceleration command is applied during the step (56) of positive acceleration downhill by a unit (40) of controlling at least one motorized raising / lowering device controlled so as to obtain an increase in a downward speed of the car (21) of between 1 m-s ^"2 and 10 m-s ^{" 2} .

8 / - Method according to one of claims 1 to 7, characterized in that at least a descent deceleration setpoint is applied during said last deceleration step (57) by a control unit (40) to at least a motorized raising / lowering device controlled so as to obtain a reduction of a speed of the car (21) between 5 m -s ^"2 and 15 m-s ^{" 2} .

91 - Method according to one of claims 1 to 8, characterized in that the emergency stop phase is performed following an emergency stop activation occurring when a ratio between a total mechanical energy of the cabin (21) and a maximum total mechanical energy of the cabin (21) which can be reached when the car (21) reaches a maximum height of rise of the car (21) in the elevator (20) is greater than 0.3.

10 / - Elevator (20) for simulating gravity reduced with respect to earth's gravity, comprising a cabin (21) and at least one motorized controlled up / down device of the cabin (21), characterized in that it comprises a unit (40) which, following an emergency stop engagement when the car (21) is raised in the elevator (20), is programmed to:

- apply at least one climb deceleration setpoint to at least one motorized controlled climb / descent device so as to reduce a climb speed of the car (21) until the car (21) reaches a climbing speed zero or a positive speed downhill,

then to apply at least one downhill positive acceleration instruction to at least one motorized up / down controlled device so as to increase a downward speed of the car (21),

and then to apply at least one deceleration setpoint to at least one motorized up / down controlled device so as to reduce a speed of the car (21) until the car (21) stops.

11 / - Lift according to claim 10, characterized in that at least one motorized device for controlled rise / fall of the cabin (21) comprises:

- at least two pulleys (26, 27), a first pulley (26), said upper pulley, being placed at the top of the elevator (20) and a second pulley (27), called lower pulley, being placed at the bottom of the the elevator (20), each pulley (26, 27) having an excavated rim of a groove,

- at least one hanger (32) extending partly in the groove of the lower pulley (27) and the upper pulley (26), and having two ends attached to the elevator cabin (21) (20) ,

at least one motor (36) adapted to rotate at least one pulley (26, 27) of the motorized controlled climb / descent device of in order to cause the cabin (21) to rise or fall in a direction of rotation of this pulley (26, 27).

12 / - Lift according to one of claims 10 or 11, characterized in that at least one motorized device for controlled rise / fall comprises at least one braking device (39) adapted to reduce a rotation speed of at least a pulley of this motorized up / down controlled device.

13 / - Lift according to one of claims 10 to 12, characterized in that the cabin (21) comprises a first mattress (24), said upper mattress, defining at least a portion of a ceiling of the cabin (21) and a second mattress (23), said lower mattress, defining at least a portion of a floor of the cabin (21).

14 / - Lift according to one of claims 10 to 13, characterized in that it also comprises fixed rails extending over the height of the elevator (20) in which the cabin (21) can be moved and on which cabin (21) of the elevator (20) is mounted.