DE102022204852A1 - Device with two coupled shaft sections and with a detection device for detecting and determining angle information of the shaft sections - Google Patents

Abstract

Device (1), comprising a first shaft section (2) coupled to a second shaft section (3) and a detection device (5) which is designed to detect second angle information (β) of the second shaft section (3) and first angle information (α) of the first shaft section (2) based on the detected second angle information (β) of the second shaft section (3) and an angular relation (γ, δ) between the first angle information (α) and the second angle information (β), where the detection device (5) is designed to determine a change in the angular relation (γ, δ) and the first angle information (α) based on the second angle information (β) of the second shaft section (3) and the changed angular relation (γ*, δ *) to be determined.

Description

The invention relates to a device comprising a first shaft section coupled to a second shaft section and a detection device which is designed to detect second angle information of the second shaft section and first angle information of the first shaft section based on the detected second angle information of the second shaft section and a To determine the angle relationship between the first angle information and the second angle information.

Devices, for example in the form of transmission devices for motor vehicles with two shaft sections coupled to one another, in which a first angle information of a first shaft section is determined based on a detected second angle information and an angular relationship between the first angle information and the second angle information, are basically from the prior art known. For example, such a second shaft section can be coupled to a rotor of an electrical machine, wherein in order to be able to reliably detect an orientation or a rotation angle, in particular a mechanical angle or an electrical angle, of the rotor during operation of the electrical machine, a transmitter element on one second shaft section can be arranged, which is firmly mechanically coupled to the first shaft section. This allows the detection position, at which the orientation of the transmitter element, which is fixedly arranged on the second shaft section, to be detected by means of the detection device, for example by means of a rotor position sensor, to be moved to a location suitable for the detection within the device, for example outside the electric machine.

In other words, the first angle information of the first shaft section does not have to be detected directly on the first shaft section, but rather the detection takes place “indirectly” via detection of the second angle information of the second shaft section, which is due to its fixed coupling to the first shaft section based on the angular relation the determination of the first angle information is allowed. For example, the angular relation is determined by detecting the first angle information and the second angle information during assembly or as part of the production of the device and determining the orientation of the respective shaft sections to one another. During the subsequent operation of the device, only the second angle information is recorded and conclusions are drawn about the first angle information based on the second angle information in connection with the angle relation. In other words, the second angle information is actively detected, for example by detecting the current orientation of the encoder element on the second shaft section and the first angle information is determined based on the initially carried out calibration between the first angle information and the second angle information.

However, the coupling between the first shaft section and the second shaft section can be changed over the operation of the device. Depending on the type of coupling, for example a spline, a change in the angular relation, albeit a comparatively minor one, can occur due to wear, which means that the determination of the first angular information can no longer be carried out precisely. In the example of determining the rotor position or determining a mechanical angle or an electrical angle for the operation of an electrical machine, even minor deviations can lead to an impairment of the control of the electrical machine.

The invention is based on the object of specifying a device that is improved in comparison.

The task is solved by a device with the features of claim 1. Advantageous refinements are the subject of the subclaims.

As described, the invention relates to a device which has a first shaft section which is coupled to a second shaft section, wherein a detection device is provided for detecting second angle information of the second shaft section, for example by means of a detection element arranged on the second shaft section, in particular a sensor wheel or a sensor element. Based on a previously established or calibrated angular relation between the first shaft section and the second shaft section, the detection device is set up to determine the first angle information of the first shaft section, in particular based on the detected second angle information by taking into account the previously described angular relation.

The invention is based on the knowledge that the detection device is designed to determine a change in the angular relation and to determine the first angle information based on the second angle information of the second shaft section and the changed angular relation. The invention therefore proposes one over the lifespan or operation of the device To determine the change in the angle relationship that occurs and to take into account that the angle relationship between the first angle information and the second angle information is changeable due to a change in the coupling of the first shaft section and the second shaft section. The coupling between the first shaft section and the second shaft section can therefore change throughout the operation of the device, for example due to wear or plastic or elastic deformation of the, in particular mechanical, coupling between the first shaft section and the second shaft section. As a result, the established angular relation mentioned at the beginning can change and therefore a changed angular relation can occur due to the change. By determining the change in the angle relationship, the first angle information can then be determined based on the second angle information, which can be detected by means of the detection device, as described above.

Compared to the previously described prior art, it is therefore possible to take into account changes in the angular relationship throughout the operation of the device. A change in the coupling between the first shaft section and the second shaft section can therefore be taken into account, so that over the operation of the device, the determination of the first angle information based on the second angle information and the angle relation does not deteriorate due to an unconsidered change in the angle relation, but rather the change in the angle relation is consciously determined and is included in the determination of the first angle information.

The angle relation, which defines the relationship between the first angle information of the first shaft section and the second angle information of the second shaft section, can change over the operation of the device, as described. For example, the first angle information can describe the orientation of the first shaft section, for example a rotor position, and the second angle information of the second shaft section can describe the orientation of the encoder element on the second shaft section. If the coupling changes, for example due to wear, the initially calibrated or recorded alignments between the first shaft section and the second shaft section, for example between the rotor and the encoder element, no longer match the current alignments. This is taken into account according to the invention by the specific change in the angular relation.

In the context of this application, the term “determine” or “determination” of the first angle information or the change in the angle relation is understood in particular as detecting or recording or determining or determining. The change in the angular relation can, for example, be specified in a defined manner, for example as a fixed value. It is also possible to carry out a recording that is dependent on state parameters or operating parameters in order to actively record the change in the angular relation. The individual mechanisms of how the change in the angular relation can be determined are presented below as examples. In principle, the change in the angle relation can be taken into account by introducing a correction term, which is taken into account in the calculation or determination of the first angle information. The detection device can have or be connected to a control device that can carry out the corresponding calculations or determinations.

The device can, for example, be designed as a gear device or be coupled to one. The transmission device can optionally be designed for torque conversion or for transmitting a rotary movement. The transmission device can optionally have a single-stage or multi-stage transmission.

According to a further development of the device, it can be provided that the detection device is designed to determine the changed angular relation by means of a wear-related correction term and/or an elastic correction term. The wear-related correction term can in particular take into account or describe wear-related changes in the coupling between the first shaft section and the second shaft section. In the example of a spline, wear can occur throughout the operation of the device, so that the coupling of the first shaft section to the second shaft section via the spline is changed by the wear and thus the angular relationship is also changed.

Further wear properties or wear effects can occur which, for example, describe or cause a plastic deformation of the coupling between the first shaft section and the second shaft section. Particularly in the case of shaft sections that are subjected to greater force in one direction than in another direction, the coupling can be plastically deformed during the operation of the device by a preferred torque transmission in one direction, so that a change in the angular relationship is also brought about. The wear-related correction term can therefore ensure that the change in the angular relation is taken into account so that, for example, the effects of the change in the angular relation over the operation of the device are kept in a defined interval, for example by (over-)compensation at the beginning of the start of operation of the device, which (over-)compensation over the operation the device is broken down due to wear.

Alternatively or additionally, an elastic correction term can also be taken into account or determined by the detection device. An elastic correction term is understood to be a correction term that describes elastic changes in the angular relation. If, for example, a defined torque is applied to the coupling between the first shaft section and the second shaft section in an operating situation of the device, this leads to an elastic deformation, which also causes an elastic change in the angular relationship. The detection device can detect or determine such elastic changes and output an elastic correction term accordingly. When determining the first angle information, the elastic correction term can be taken into account, so that in the load conditions described, the deformation of the first shaft section relative to the second shaft section can be taken into account and the first angle information can be determined accordingly.

In principle, the first shaft section and the second shaft section can be designed in any way and be mechanically coupled to one another. The first shaft section and the second shaft section can, for example, be arranged on the same shaft or form components of the same shaft. The shaft can, for example, be made in one piece, with a first end or a first section of the shaft being referred to as the “first shaft section” and a second end of the shaft or a second section of the shaft being referred to as the “second shaft section”. For example, the first shaft section can be coupled to a rotor or be part of a rotor shaft and the second shaft section can carry the encoder element. Here, the second shaft section and the first shaft section can be part of the rotor shaft, the sensor element being arranged in the second shaft section and the rotor being connected in the first shaft section.

Alternatively or additionally, it is possible for the first shaft section and the second shaft section to be designed as shaft sections that are cohesively connected to one another or to form such shaft sections, with the wear-related correction term describing a plastic change in the angular relation. As described at the beginning, a plastic change in the angular relationship can occur throughout the operation of the device. If the shaft on which the first shaft section and the second shaft section is arranged or the two shaft sections which are cohesively connected to one another is subjected to torque sufficiently often or sufficiently strongly, a plastic deformation, for example a plastic torsion, of the shaft sections can occur relatively appear to each other. In particular, if the shaft sections are comparatively long, for example if a comparatively large distance is provided between the connection of a rotor and the connection of a turntable designed as a transmitter element, even a slight torsion can lead to a significant angular deviation. By taking such a plastic change in the angle relation into account through the wear-related correction term, the change in the angle relation can be taken into account and the determination of the first angle information can be improved.

As described at the beginning, a further embodiment of the device can provide that the shaft sections are positively coupled to one another. For example, the first shaft section can be positively coupled to the second shaft section, in particular by means of a spline, the wear-related correction term describing wear of at least one transmission component between the first and the second shaft section. In principle, the first shaft section can be coupled to the second shaft section via further transmission components. Here, wear can occur, for example, on the positive coupling, in particular on a spline between the first shaft section and the second shaft section.

The wear of the at least one gear component also changes the relationship or the angular relationship between the first shaft section and the second shaft section, since, for example, a rotation of the first shaft section does not lead to a uniform rotation of the second shaft section. The spline can wear out, so that tooth flanks are worn away and thus a change in the alignment of the individual gear components to one another is caused, for example the first shaft section and the second shaft section are not in an initially set or calibrated alignment to one another. Such wear of the at least one transmission component can be described by the wear-related correction term and taken into account in the determination of the first angle information.

The wear-related correction term can basically be of any design or can describe any dependencies and functional relationships. In a simple embodiment, the wear-related correction term can comprise at least one defined scalar value, in particular a correction of the angular relation in a direction opposite to the change generated by the expected wear effect. In other words, the wear effect that will occur over the operation of the device can be determined. For example, before operating the device, it can be determined in which way the coupling between the first shaft section and the second shaft section will wear.

For example, the wear of a spline can be determined and taken into account accordingly. The wear-related correction term can thus change the angle relationship between the first angle information and the second angle information in such a way that the expected wear effect is compensated for. Here, the correction term causes a correction of the angular relation in the opposite direction, so the wear-related correction term causes a correction of the angular relation, which is directed in the opposite direction to the change in the angular relation due to wear. The wear-related correction term can in particular be chosen so that the change in the angular relation is kept within a certain operating range or value range over the operating period of the device.

The expected wear effect can thus be described by the wear-related correction term in such a way that overcompensation is achieved at the start of operation of the device. Throughout the operation of the device, the change in the angular relation introduced by the correction term is initially reduced until the wear-related change in the angular relation corresponds to the actual desired value of the angular relation. A further wear-related change in the angular relation thus initially leads to a reduction in the deviation from the angular relation introduced by the wear-related correction term and then to a wear-related deviation from the desired angular relation. By appropriately selecting the wear-related correction term, it can be achieved that the wear-related change in the angular relation can be reduced relative to its absolute value over the entire operating period of the device. In this embodiment, the wear-related correction term can be understood as an “offset”, particularly in the opposite direction of the expected wear effect, or as a “buffer around the setpoint”.

According to a further embodiment of the device, it can be provided that the wear-related correction term is time-dependent, in particular increasing with the operating hours of the device. The time dependence of the correction term can be chosen to be linear or non-linear. In particular, the way in which the wear effect changes the angular relation can be taken into account. For example, it can be taken into account whether the change in the angular relation is greater at the start of operation of the device than over the course of operation. The correction term can, for example, have almost no influence on the determination of the angular relation at the start of operation of the device, since the wear effect is small or non-existent at the start of operation of the device. The longer the device is operated, the greater the expected wear effect, so that the correction term also increases with the number of operating hours and thus describes the wear of the coupling.

A further embodiment of the device can provide that the wear-related correction term is load-dependent. For this purpose, the correction term or the detection device for determining the correction term can be supplied with or take into account various load-dependent parameters. For example, load cases, load peaks, transmitted torques, shocks and other events can be taken into account. Tolerances or unbalance occurring in the coupling can also be taken into account in the correction term. Such load-dependent events or parameters can therefore be taken into account, since different levels of wear can be expected depending on the load condition. The corresponding parameters can, for example, also be summed or integrated in order to enable a description of the wear that has occurred that is as realistic as possible in the current operating state. In the time-dependent and/or load-dependent execution of the correction term, the correction term can be understood, for example, as a function of the respective parameters, in particular as a function of the time or the operating hours of the device and/or as a function of at least one load-dependent parameter. The wear can also be recorded directly, for example by recording the geometry of a tooth flank. The wear-related correction term can therefore directly reflect the state of wear.

As described above, the first angle information and the second angle information each describe the alignment and the orientation of the Shaft sections or the units arranged on the shaft sections. In principle, the first angle information and/or the second angle information can include or describe an electrical angle and/or a mechanical angle. Any combinations are also possible here, so that, for example, the electrical angle of a rotor of an electrical machine, which is connected to the first shaft section and is described via the first angle information, can be described and determined based on a mechanical angle in the form of second angle information. In principle, the first shaft section can be coupled to a rotor of an electrical machine, for example as a section of a rotor shaft. The second shaft section can be tilted with a sensor element, for example a sensor wheel.

The device can further be developed in such a way that the detection device is designed to determine different correction terms for different directions of rotation and/or load of the first shaft section and/or the second shaft section. As previously described, the load on the coupling between the first shaft portion and the second shaft portion may determine the extent to which the coupling will wear over operation of the device. Differences in the possible directions of rotation and/or load of the first shaft section and/or the second shaft section can occur. In devices for motor vehicles, for example, one direction of rotation and/or load of the shaft sections can be preferred over the other, for example opposite, direction of rotation and/or load.

If one direction of rotation and/or load is assigned to the forward gears and the other direction of rotation and/or load is assigned to the reverse gear, it can be assumed that the direction of rotation and/or load assigned to the forward gears generates significantly more torque, for example more starting processes, more switching processes, etc. , transmitted as the opposite direction of rotation and/or load. When the direction of rotation or the direction of load changes, flank changes in particular occur, so that different loads occur on the flanks of the toothings coupling the shaft sections. A flank change on a spline can occur much more frequently when the load direction changes (e.g. when a motor vehicle accelerates and brakes via the electric machine) than when the driving direction changes. This means that the coupling between the first shaft section and the second shaft section is also subject to greater stress in one of the two possible directions of rotation and/or load and wear will therefore also occur more strongly in this direction of rotation and/or load. If the two shaft sections are coupled to one another, for example by means of a spline, this can result in the tooth flanks wearing more in one direction of rotation and/or load than in the other direction of rotation and/or load. By providing different correction terms for the different directions of rotation and/or load, such effects can be taken into account and the determination of the first angle information for both directions of rotation and/or load can be improved.

In addition to the device, the invention relates to a motor vehicle, comprising such a previously described device. The device can be designed as a transmission device of the motor vehicle or can be coupled to one. The invention further relates to a method for controlling operation of a device, comprising a first shaft section coupled to a second shaft section and a detection device, wherein second angle information of the second shaft section is detected by means of the detection device and first angle information of the first shaft section based on the detected second angle information of the second shaft section and an angle relationship between the first angle information and the second angle information is determined, a change in the angle relationship being determined and the first angle information being determined based on the second angle information of the second shaft section and the changed angle relationship. The method described can be carried out on or to control the previously described device. The method may relate in particular to the control of the operation of a previously described device, which is designed as a transmission device of a motor vehicle.

All advantages, details and features described in relation to the device are fully transferable to the motor vehicle and the method.

• 1 eine Prinzipdarstellung eines Ausschnitts einer Vorrichtung;
• 2 einen schematischen Ausschnitt einer Vorrichtung; und
• 3 ein schematisches Ablaufdiagramm eines Verfahrens zur Steuerung eines Betriebs einer Vorrichtung.

The invention is explained below using exemplary embodiments with reference to the figures. The figures are schematic representations and show:

• 1 a schematic representation of a section of a device;
• 2 a schematic section of a device; and
• 3 a schematic flowchart of a method for controlling operation of a device.

1 shows a schematic representation of a section of a device 1, for example for a motor vehicle, not shown in detail. Such a motor vehicle therefore has the device 1. The device 1 can have further components, not shown, or can be coupled or coupled to them. The device 1 can be designed as a transmission device of the motor vehicle 1 and can optionally be designed to transmit a rotary movement and/or torque conversion.

Basically, the device 1 has a first shaft section 2 and a second shaft section 3, which are coupled to one another via a coupling 4. The two shaft sections 2, 3 can in turn be coupled to different devices of the device 1 or other units. The coupling 4 can be designed as a positive or cohesive coupling. Further transmission components, for example toothings of gears or other elements, which are designed for coupling between the first shaft section 2 and the second shaft section 3, can also be provided in the coupling 4. When assembling the device 1, the first shaft section 2 is coupled to the second shaft section 3 in a defined orientation or alignment, namely when the coupling 4 is established. Here, the angle relationship between a first angle information of the first shaft section 2 and a second angle information of the second shaft section 3 can be established or determined or calibrated.

Subsequently, during operation of the device 1, the second angle information of the second shaft section 3 can be detected by means of a detection device 5. For this purpose, for example, on the second shaft section 3 an in 1 A sensor element, not shown in detail, for example a sensor wheel, can be arranged, whose orientation around the axis of rotation can be detected as second angle information via a sensor. In particular, the current orientation of the second shaft section 3 can thereby be detected by means of the detection device 5. The detection device 5 can, for example, be present as part of a control device 50 for controlling the electrical machine. Optionally, a storage unit 5a assigned to the detection device 5 can be present, with which detected angle values are stored for further processing. Based on the coupling 4 and the previously established angle relation, the first angle information of the first shaft section 2 can therefore be determined by detecting the second angle information of the second shaft section 3.

However, wear can occur during the operation of the device 1, so that the coupling 4 is changed and thus the previously established angular relationship between the first shaft section 2 and the second shaft section 3 is also changed. The detection of the second angle information via the detection device 5 can therefore no longer be used reliably enough to determine the first angle information using the previously calibrated or established angle relation. The detection device 5 is designed to determine a change in the angular relationship during the operation of the device 1. In particular, the detection device 5 can determine a correction term by which the initially determined angle relationship between the first angle information and the second angle information must be changed in order to take into account the change in the coupling 4 or the change in the coupling 4 over the operation of the device 1 to be taken into account.

The correction term can basically be defined due to wear or elastically, since the coupling 4 is changed, for example, due to wear properties. This can be done, for example, in relation to 2 be described in more detail. In principle, any coupling of the first shaft section 2 to the second shaft section 3 can be present, so that the wear can, on the one hand, relate to the removal of material, for example on a toothing, as in the exemplary embodiment in 2 is described. It is also possible for the two shaft sections 2, 3 to belong to the same shaft and for the coupling 4 to describe a cohesive coupling or a material-uniform coupling. Due to the wear, a plastic deformation of the coupling 4 can occur, for example if a torsion of the shaft occurs during the operation of the device 1, which twists or plastically twists the first shaft section 2 relative to the second shaft section 3.

The correction term, which describes the change in the angular relation over the operation of the device 1, can be specified as a fixed scalar value or determined as a function of at least one parameter, in particular the time, the operating hours or a load-dependent parameter. This makes it possible to take into account the extent to which wear or elastic deformations change the coupling 4. For example, the wear causes a constant change in the coupling 4 over the operation of the device 1, so that the change in the angular relationship also occurs over the operating period or depending on the load.

2 shows opposite the in 1 The schematic diagram shown shows a specific example in which the first shaft section 2 is connected to the second shaft section 3 via a form-fitting coupling 4, for example as a spline 6. As described at the beginning, the shaft sections 2, 3 can in principle be connected to any components, devices or units. The execution in 2 is therefore only to be understood as an example and can be changed accordingly in relation to the connected components. The first shaft section 2 is in the exemplary embodiment 2 coupled to a rotor 7 of an electrical machine 8, which is rotatably mounted relative to a stator 9. A sensor element 10, in particular a sensor wheel, is attached to the second shaft section 3, the orientation of which can be determined via a sensor 11, in particular a rotor position sensor.

The sensor 11 is coupled to the previously described detection device 5, so that the measured values of the sensor 11 can be recorded and thus the second angle information, for example a rotation angle of the second shaft section 3, can be detected by the detection device 5. As described at the beginning, the first shaft section 2 is connected to the second shaft section 3 via the coupling 4, so that there is initially a defined angular relationship. It is therefore possible to infer or determine the first angle information, for example the electrical angle of the rotor 7, by “translating” or converting the second angle information into the first angle information based on the initially defined angle relation.

In order to ensure the determination of the first angle information throughout the operation of the device 1, the detection device 5 takes a change in the angular relation into account. For this purpose, the detection device 5 determines a correction term, which, as described above, can be a scalar value, or a function of time or operating hours or a load-dependent parameter. The angle relation can therefore be changed by the correction term, so that the state of wear of the device 1 in the current operating state can be taken into account and therefore the changed angle relation can be used to transfer the second angle information into the first angle information or the first angle information based on the second To be able to determine angle information.

The first angle information determined by the detection device 5 can then be used by the control device 50 to generate a control signal of the electrical machine 8. For this purpose, in the present exemplary embodiment, the control device 50 is connected to an inverter 12, which, according to the specification of the control device 50, can apply an alternating voltage to the stator of the electrical machine with variable frequency and amplitude. For this purpose, the electrical machine 8 is connected to an electrical energy storage device 13 by means of the inverter 12.

A method for controlling the operation of a device 1, for example an in 1 or 2 Device 1 shown is schematic in 3 shown. Optionally, the method starts in a block 14, in which the coupling 4 between the first shaft section 2 and the second shaft section 3 is provided. For example, a positive connection can be added to produce the coupling 4, for example if it is as in 2 shown, is designed as a spline 6. The first angle information α and the second angle information β can then be determined in blocks 15, 16. From this, an angle deviation or difference angle information is subsequently determined in a block 17, which can also be determined or referred to as an angle relation. This can alternatively be determined as γ=α-β or as δ=β-α. If the first angle information α is to be determined based on the second angle information β, the first angle information α can be calculated by detecting the second angle information β, namely on the basis of the previously determined angle relation γ, δ.

In a block 18, the method carries out a compensation for the change in the previously described angle relation γ, δ, which, for example, takes into account a wear-related or an elastic change in the angle relation γ, δ in order to determine the first angle information α based on the angle relation γ, δ improve. In other words, as described above, wear or elastic deformation of the coupling 4 can cause a change in the angular relation γ, δ, which can be determined by the detection device 5. For this purpose, the previously described angle relation γ, δ is expanded by a correction term ε, which correction term ε can be defined due to wear or elastically. The correction term ε can be defined as a scalar value or as a function, in particular as a time-dependent or load-dependent function, i.e., for example, depending on the operating hours of the device 1 or depending on at least one load-dependent parameter.

The change in the angle relation γ, δ, i.e. the changed angle relation γ*, δ* results, for example, from γ*=α-β+ε or from δ*=β-α-ε. The changed can then be made in a block 19 Angle relation γ*, δ* can be used to determine the first angle information α. The block 19 can, for example, be supplied with the further necessary parameters in order to be able to determine the correction term ε in the current operating situation, for example the current operating hours of the device 1 or the current load state or load state of the coupling 4.

The details, advantages and features shown in the individual figures can be combined with one another in any way, interchangeable and transferable to one another. That with reference to 3 The method described can be carried out on or with the device 1 1 , 2 be executed.

Reference symbols

1

contraption

2

first wave section

3

second wave section

4

coupling

5

Detection device

5a

Storage unit

6

splines

7

rotor

8th

electric machine

9

stator

10

donor element

11

sensor

12

Inverters

13

electrical energy storage

14-19

block

50

Control device

Claims (11)

Device (1), comprising a first shaft section (2) coupled to a second shaft section (3) and a detection device (5) which is designed to detect second angle information (β) of the second shaft section (3) and first angle information (α) of the first shaft section (2) based on the detected second angle information (β) of the second shaft section (3) and an angular relation (γ, δ) between the first angle information (α) and the second angle information (β) . characterized in that the detection device (5) is designed to determine a change in the angular relation (γ, δ) and the first angle information (α) based on the second angle information (β) of the second shaft section (3) and the changed angular relation (γ *, δ*). Device (1) according to Claim 1 , characterized in that the detection device (5) is designed to determine the changed angle relation (γ*, δ*) by means of a wear-related correction term (ε) and / or an elastic correction term (ε). Device (1) according to Claim 1 or 2 , characterized in that the first shaft section (2) and the second shaft section (3) are arranged on the same shaft and / or form shaft sections (2, 3) that are cohesively connected to one another, the wear-related correction term (ε) causing a plastic change in the angular relation ( γ*, δ*) describes. Device (1) according to Claim 1 or 2 , characterized in that the first shaft section (2) is positively coupled, in particular by means of a spline (6), to the second shaft section (3), the wear-related correction term (ε) indicating wear of at least one transmission component between the first and the second shaft section (2, 3) describes. Device (1) according to one of the Claims 2 until 4 , characterized in that the wear-related correction term (ε) comprises at least one defined scalar value, in particular a correction of the angular relation (γ*, δ*) in a direction opposite to the change generated by the expected wear effect. Device (1) according to one of the Claims 2 until 5 , characterized in that the wear-related correction term (ε) is time-dependent, in particular increasing with the operating hours of the device (1). Device (1) according to one of the Claims 2 until 6 , characterized in that the wear-related correction term (ε) is load-dependent. Device (1) according to one of the preceding claims, characterized in that the first angle information (α) and/or the second angle information (β) comprises an electrical angle and/or a mechanical angle. Device (1) according to one of the preceding claims, characterized in that the detection device (5) is designed to generate different correction terms (ε ) to determine. Motor vehicle, comprising a device (1) according to one of the preceding claims. Method for controlling an operation of a device (1), comprising a first shaft section (2) coupled to a second shaft section (3) and a detection device (5), wherein by means of the detection device (5) a second angle information (β) of the second shaft section ( 3) and a first angle information (α) of the first shaft section (2) based on the detected second angle information (β) of the second shaft section (3) and an angle relation (γ, δ) between the first angle information (α) and the second angle information (β) is determined, characterized in that a change in the angle relation (γ, δ) is determined and the first angle information (α) is based on the second angle information (β) of the second shaft section (3) and the changed angle relation (γ*, δ*) is determined.

Images