Device and method for determining a multi-dimensional driver parameter for trialling a vehicle component or a vehicle

Abstract

The invention concerns a device and computer-implemented method for determining a multi-dimensional driver parameter for trialling a vehicle component or a vehicle, wherein velocity profiles of a vehicle are provided (202) which are measured during journeys made by a driver with the vehicle. Multiple parts of the profiles are identified (204) as a function of velocity level, with at least one dimension of the driver parameter being determined (206) as a function of the velocity in said parts.

Description

[0001] Description

[0002] title

[0003] Device and method for determining a multidimensional driver parameter for testing a vehicle component or a vehicle

[0004] State of the art

[0005] The invention is based on a device and a method for determining a multidimensional driver parameter for testing a vehicle component or a vehicle.

[0006] Disclosure of the invention

[0007] A computer-implemented method for determining a multidimensional driver parameter for testing a vehicle component or a vehicle provides measured vehicle speed profiles during a driver's journeys. Depending on the speed, several parts of the profiles are identified, with at least one dimension of the driver parameter being determined in the parts depending on the speed. The testing includes, for example, a test of the vehicle or the vehicle component.

[0008] For example, several parts of the curves are identified, each comprising acceleration from a vehicle standstill or essentially from a vehicle standstill or deceleration to a vehicle standstill or essentially a vehicle standstill, whereby a dimension of the driver parameter that characterizes an acceleration or deceleration tolerated by the driver is determined in the parts. This takes into account the dependence of the acceleration or deceleration level on the speed. At high speeds on the motorway, for example, due to the vehicle's limited engine power, only lower accelerations will occur than when accelerating from a vehicle standstill. The same applies to decelerations that may occur. This determines the most realistic driver parameter possible.

[0009] For example, a dimension of the driver parameter that characterizes a driver-tolerated acceleration is determined based on the sections where an acceleration is greater than an acceleration threshold, or a dimension of the driver parameter that characterizes a driver-tolerated deceleration is determined based on the sections where a deceleration is greater than a deceleration threshold. This allows only acceleration and braking processes with a speed change greater than the respective threshold to be considered. This determines a realistic value for the tolerated acceleration or deceleration.

[0010] It can be provided that the dimension of the driver parameter that characterizes the acceleration tolerated by the driver comprises a quantile, in particular a quantile between a 50% quantile or a 90% quantile, and a standard deviation or variance of the acceleration from the parts that each comprise an acceleration from the vehicle standstill or substantially from the vehicle standstill, or wherein the dimension of the driver parameter that characterizes the deceleration tolerated by the driver comprises a quantile, in particular a quantile between a 50% quantile or a 90% quantile, and a standard deviation or variance of the deceleration from the parts that each comprise a deceleration to the vehicle standstill or substantially to the vehicle standstill. This means that to describe the tolerated acceleration or deceleration, a statistical scatter is taken into account, which, for example,affects the speed due to traffic density or the driver's current state of mind.

[0011] It can be provided that an average speed is determined for several sections of the curves, wherein several sections are assigned to a speed zone comprising the average speed depending on the average speed determined for the respective section, and wherein a dimension of the driver parameter that characterizes a driver's driving style or an average speed deviation tolerated by the driver is determined depending on the average speeds of the sections assigned to the speed zone. The driving style or the tolerated speed deviations differ depending on the type of road traveled. For example, the driving style or the tolerated speed deviation differs on a motorway from that in a city.The speed zones determine the most realistic driver parameters possible, regardless of the type of road on which the curves are measured.

[0012] It can be provided that for a speed zone, for each part assigned to the speed zone, an amplitude of a speed oscillation in the part is determined as a function of the average speed determined for the part, wherein an average value of the amplitudes determined for the parts assigned to the speed zone is determined, and wherein the dimension of the driver parameter characterising the driving style of the driver in the speed zone comprises the average value of the amplitudes.

[0013] It can be provided that, for a speed zone, for each part assigned to the speed zone, a standard deviation or variance of a speed oscillation in the part is determined as a function of the average speed determined for the part, wherein a mean value of the standard deviations or variances determined for the parts assigned to the speed zone is determined, and wherein the dimension of the driver parameter characterising the driving style of the driver in the speed zone comprises the mean value of the standard deviations or variances.

[0014] It can be provided that the profiles measured during journeys by the driver with the vehicle are each provided with information about speed limits on the route traveled, wherein for each speed zone for each part assigned to the speed zone, a quotient is determined from a theoretical travel time resulting from exact compliance with the speed limits on a section of the route traveled contained in the part, and the actual travel time required by the vehicle for traveling on the section of the route traveled contained in the part, in particular without taking into account times of vehicle standstill, wherein an average value of the quotients is determined which are determined for the parts assigned to the speed zone, and wherein the dimension of the driver parameter which characterizes the average speed deviation tolerated by the driver in the speed zone,the mean of the quotients.

[0015] It can be provided that the profiles measured during journeys by the driver with the vehicle are each provided with information about speed limits on the route travelled, wherein sections of the routes travelled are determined on which no speed limits apply, wherein a dimension of the driver parameter which characterises a selected speed on unrestricted motorway sections is determined as a function of an average value of the speeds in the sections of the routes travelled on which no speed limits apply.

[0016] It may be provided that parts of the curves in which the speed falls below a predetermined lower speed threshold are not taken into account when determining the mean value of the speeds.

[0017] It may be provided that the testing of the vehicle component is carried out depending on the multidimensional driver parameter.

[0018] A device for determining a multidimensional driver parameter for testing a vehicle component or a vehicle comprises at least one processor and at least one memory, wherein the at least one memory comprises instructions executable by the at least one processor, upon execution of which instructions by the at least one processor, the device carries out the method.

[0019] A computer program comprises computer-readable instructions which, when executed by a computer, carry out on the computer the method for determining a multi-dimensional driver parameter for testing a vehicle component or a vehicle.

[0020] Further advantageous embodiments can be found in the following description and the drawing. The drawing shows: Fig. 1 a schematic representation of a device for determining a multidimensional driver parameter for testing a vehicle component or a vehicle,

[0021] Fig. 2 is a flowchart showing steps of a method for determining the multidimensional driver parameter.

[0022] Figure 1 schematically shows a device 100 for determining a multidimensional driver parameter for testing a vehicle component or a vehicle.

[0023] The device 100 comprises at least one processor 102 and at least one memory 104.

[0024] The at least one memory 104 comprises instructions executable by the at least one processor 102, upon execution of which instructions by the at least one processor 102, the device 100 executes a method for determining a multidimensional driver parameter for testing a vehicle component or a vehicle.

[0025] The device 100 comprises, for example, a computer. A computer program executable by the computer comprises, for example, the instructions.

[0026] Figure 2 shows a flowchart with steps of the process.

[0027] The method includes a step 202.

[0028] In step 202, measured vehicle speed profiles are provided when a driver travels with a vehicle.

[0029] It may be provided that the courses measured during the driver's journeys with the vehicle are each provided with information about speed limits on the route travelled.

[0030] The method includes a step 204.

[0031] In step 204, several parts of the curves are identified depending on the speed level. For example, several parts of the curves are identified, each of which includes acceleration from a vehicle standstill or essentially from a vehicle standstill.

[0032] For example, several parts of the courses are identified, each of which includes deceleration to a vehicle standstill or essentially to a vehicle standstill.

[0033] It may be provided that an average speed is determined for several parts of the courses, whereby several parts are assigned to a speed zone comprising the average speed depending on the average speed determined for the respective part.

[0034] The method includes a step 206.

[0035] In step 206, at least one dimension of the driver parameter is determined depending on the speed in the parts.

[0036] For example, a dimension of the driver parameter that characterizes an acceleration tolerated by the driver is determined depending on the speed in the parts that include the acceleration. For example, a dimension of the driver parameter that characterizes a deceleration tolerated by the driver is determined depending on the speed in the parts that include the deceleration.

[0037] The dimension of the driver parameter, which characterizes the acceleration tolerated by the driver, is determined, for example, depending on the parts in which an acceleration is greater than an acceleration threshold.

[0038] The dimension of the driver parameter that characterizes the acceleration tolerated by the driver includes, for example, a quantile of the accelerations, in particular a quantile between a 50% quantile or a 90% quantile.

[0039] It may be provided that the dimension of the driver parameter characterising the acceleration tolerated by the driver comprises a standard deviation or variance of the acceleration from the parts each comprising an acceleration from the vehicle standstill or substantially from the vehicle standstill.

[0040] The dimension of the driver parameter that characterizes the deceleration tolerated by the driver includes, for example, a quantile of the decelerations, in particular a quantile between a 50% quantile or a 90% quantile.

[0041] It may be provided that the dimension of the driver parameter characterising the deceleration tolerated by the driver comprises a standard deviation or variance of the deceleration from the parts each comprising a deceleration until the vehicle comes to a standstill or substantially until the vehicle comes to a standstill.

[0042] It may be provided that a dimension of the driver parameter characterising a driving style of the driver or an average speed deviation tolerated by the driver is determined depending on the average speeds of the parts assigned to the speed zone.

[0043] For example, for a speed zone, an amplitude of a speed oscillation in the part is determined for each part assigned to the speed zone, depending on the average speed determined for the part. For example, an average value of the amplitudes determined for the parts assigned to the speed zone is determined.

[0044] The dimension of the driver parameter that characterizes the driver's driving style in the speed zone includes, for example, the mean value of the amplitudes.

[0045] For example, for a speed zone, a standard deviation or variance of a speed oscillation in the part is determined for each part assigned to the speed zone, depending on the average speed determined for the part. For example, a mean of the standard deviations or variances determined for the parts assigned to the speed zone is determined. The dimension of the driver parameter that characterizes the driver's driving style in the speed zone includes, for example, the mean of the standard deviations or variances.

[0046] It may be provided that for a speed zone, for each part assigned to the speed zone, a quotient is determined from a theoretical travel time resulting from exact compliance with the speed limits on a section of the route travelled contained in the part, and the actual travel time for the section contained in the part, in particular without taking into account times when the vehicle is stationary.

[0047] Provision may be made for an average value to be determined of the quotients determined for the parts assigned to the speed zone.

[0048] For example, the dimension of the driver parameter that characterizes the mean speed deviation tolerated by the driver in the speed zone includes the mean value of the quotients.

[0049] It may be possible to identify sections of the routes travelled where there are no speed limits.

[0050] For example, a dimension of the driver parameter characterizing a chosen speed on unrestricted motorway sections is determined depending on an average value of the speeds in the sections of the driven routes where there are no speed limits.

[0051] It may be provided that parts of the curves are disregarded when determining the mean value of the speeds in which the speed falls below a predetermined lower speed threshold, e.g. 100 km / h or 80 km / h or 60 km / h.

[0052] The method optionally includes a step 208. In step 208, the testing of the vehicle component is carried out depending on the multidimensional driver parameter.

[0053] For example, load spectrum distributions from the field are used for the reliability design of vehicle components. In the early development phase, when no field data is yet available, these distributions are estimated using a virtual measurement campaign, for example. In this type of testing, the behavior of a large number of users is simulated, for example, and the load spectrum distribution in the field is estimated.

[0054] Different driver types are modeled in testing using a respective multidimensional driver parameter.

[0055] The method can provide multidimensional driver parameters for different driver types from the measured profiles of several drivers.

[0056] The method may provide for testing to be carried out with multidimensional driver parameters for different driver types.

Claims

Claims 1 . A computer-implemented method for determining a multidimensional driver parameter for testing a vehicle component or a vehicle, characterized in that measured curves of a speed of the vehicle are provided (202) when a driver travels with a vehicle, wherein a plurality of parts of the curves are identified (204) depending on the level of the speed, wherein at least one dimension of the driver parameter is determined in the parts depending on the speed (206).

2. Method according to claim 1, characterized in that a plurality of parts of the courses are identified, each comprising an acceleration from a vehicle standstill or substantially from a vehicle standstill or a deceleration to a vehicle standstill or substantially to a vehicle standstill, wherein a dimension of the driver parameter characterizing an acceleration or deceleration tolerated by the driver is determined in the parts (206).

3. The method according to claim 1, characterized in that a dimension of the driver parameter which characterizes an acceleration tolerated by the driver is determined (206) as a function of the parts in which an acceleration is greater than an acceleration threshold value or that a dimension of the driver parameter which characterizes a deceleration tolerated by the driver is determined (206) as a function of the parts in which a deceleration is greater than a deceleration threshold value.

4. Method according to one of claims 2 or 3, characterized in that the dimension of the driver parameter which characterizes the acceleration tolerated by the driver comprises a quantile, in particular a quantile between a 50% quantile or a 90% quantile, and a standard deviation or variance of the acceleration from the parts which each comprise an acceleration from the vehicle standstill or substantially from the vehicle standstill (206), or wherein the dimension of the driver parameter which characterizes the deceleration tolerated by the driver characterized, comprises a quantile, in particular a quantile between a 50% quantile or a 90% quantile, and a standard deviation or variance of the deceleration from the parts, each of which comprises deceleration until the vehicle comes to a standstill or substantially until the vehicle comes to a standstill (206).

5. Method according to one of the preceding claims, characterized in that an average speed is determined for several parts of the curves, wherein several parts are assigned to a speed zone comprising the average speed depending on the average speed determined for the respective part, and wherein a dimension of the driver parameter which characterizes a driving style of the driver or an average speed deviation tolerated by the driver is determined depending on the average speeds of the parts assigned to the speed zone (206).

6. Method according to one of the preceding claims, characterized in that for a speed zone, for each part assigned to the speed zone, an amplitude of a speed oscillation in the part is determined as a function of the average speed determined for the part, wherein a mean value of the amplitudes determined for the parts assigned to the speed zone is determined, and wherein the dimension of the driver parameter which characterizes the driving style of the driver in the speed zone comprises the mean value of the amplitudes (206).

7. The method according to claim 5, characterized in that for a speed zone, for each part assigned to the speed zone, a standard deviation or variance of a speed oscillation in the part is determined as a function of the average speed determined for the part, wherein a mean value of the standard deviations or variances determined for the parts assigned to the speed zone is determined, and wherein the dimension of the driver parameter characterizing the driving style of the driver in the speed zone comprises the mean value of the standard deviations or variances (206).

8. Method according to one of claims 5 to 7, characterized in that the profiles measured during journeys of the driver with the vehicle are each provided with information about speed limits on the route traveled (202), wherein for a speed zone for each part assigned to the speed zone, a quotient is determined from a theoretical travel time resulting from exact compliance with the speed limits on a section of the route traveled contained in the part, and the real travel time required by the vehicle, in particular without taking into account times of a vehicle standstill, for traveling on the section of the route traveled contained in the part, wherein an average value of the quotients is determined which are determined for the parts assigned to the speed zone, and wherein the dimension of the driver parameter,which characterizes the mean speed deviation tolerated by the driver in the speed zone, includes the mean value of the quotients (206)., 9. Method according to one of the preceding claims, characterized in that the profiles measured during journeys of the driver with the vehicle are each provided with information about speed limits on the route traveled (202), wherein sections of the routes traveled are determined on which no speed limits exist, wherein a dimension of the driver parameter which characterizes a selected speed on unrestricted motorway sections is determined as a function of an average value of the speeds in the sections of the routes traveled on which no speed limits exist (206).

10. Method according to claim 9, characterized in that parts of the curves in which the speed falls below a predetermined lower speed threshold are not taken into account when determining the mean value of the speeds (206).

11. Method according to one of the preceding claims, characterized in that the testing of the vehicle component is carried out depending on the multidimensional driver parameter (208).

12. Device (100) for determining a multidimensional driver parameter for testing a vehicle component or a Vehicle, characterized in that the device (100) comprises at least one processor (102) and at least one memory (104), wherein the at least one memory (104) comprises instructions executable by the at least one processor (102), upon execution of which instructions by the at least one processor (102), the device (100) carries out the method according to one of claims 1 to 11.

13. A computer program, characterized in that the computer program comprises computer-readable instructions, the execution of which by a computer on the computer carries out the method according to one of claims 1 to 11.

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