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

Abstract

Device and computer-implemented method for determining a multidimensional driver parameter for testing a vehicle component or a vehicle, wherein measured curves of a speed of the vehicle are provided during journeys of a driver with a vehicle (202), wherein a plurality of parts of the curves are identified depending on the level of the speed (204), wherein at least one dimension of the driver parameter is determined depending on the speed in the parts (206).

Description

Prior ArtThe invention is based on a device and a method for determining a multi-dimensional driver parameter for a test of a vehicle component or a vehicle.Disclosure of the InventionA computer-implemented method for determining a multidimensional driver parameter for a test of a vehicle component or of a vehicle provides that curves of a speed of the vehicle measured during journeys of a driver with a vehicle are provided, wherein a plurality of parts of the curves are identified depending on the height of the speed, wherein at least one dimension of the driver parameter is determined depending on the speed in the parts. The test comprises, for example, a test of the vehicle or of the vehicle component.For example, a plurality of parts of the profiles are identified, each of which comprises an acceleration from a vehicle standstill or substantially from a vehicle standstill or a deceleration to a vehicle standstill or to substantially a vehicle standstill, wherein a dimension of the driver parameter, which characterizes an acceleration or deceleration tolerated by the driver, is determined in the parts. This takes into account a dependence of the acceleration or deceleration level on the speed. At high speeds on the freeway, for example, only lower accelerations will occur because of limited engine output of the vehicle than when accelerating from a standstill of the vehicle. The same applies to delays that may occur. As a result, a driver parameter that is as realistic as possible is determined.For example, a dimension of the driver parameter characterizing driver-tolerated acceleration is determined depending on the parts where acceleration is greater than an acceleration threshold or a dimension of the driver parameter characterizing driver-tolerated deceleration is determined depending on the parts where deceleration is greater than a deceleration threshold. As a result, only starting or braking processes with a speed change which is greater than the respective threshold value are taken into account. This determines a realistic value for the tolerated acceleration or deceleration.It can be provided that the dimension of the driver parameter characterizing 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, or wherein the dimension of the driver parameter characterizing 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 which each comprise a deceleration until the vehicle standstill or substantially until the vehicle standstill. This means that, for describing the tolerated acceleration or deceleration, a statistical spread is taken into account in each case, which has an effect on the speed, for example on the basis of a traffic density or a current mood state of the driver.It can be provided that an average speed is determined for a plurality of parts of the profiles, wherein a plurality of parts are assigned to a speed zone which comprises 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. The driving style or the tolerated speed deviations differ depending on a road type being traveled on. For example, the driving style or tolerated speed deviation on a freeway differs from that in a city. The speed zones determine a most realistic possible driver parameter independently of the road type on which the curves are measured.It may be provided that for a speed zone per part associated with the speed zone, an amplitude of a speed oscillation in the part is determined depending on the average speed determined for the part, wherein an average value of the amplitudes determined for the parts associated with 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 average value of the amplitudes.It may be provided that for a speed zone per part associated with the speed zone, a standard deviation or variance of a speed oscillation in the part is determined depending on the average speed determined for the part, wherein an average of the standard deviations or variances determined for the parts associated with 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 average of the standard deviations or variances.It can be provided that the curves measured during journeys of the driver with the vehicle are each provided with information about speed limits on the route being traveled, wherein for a speed zone, for each part which is assigned to the speed zone, a quotient of a theoretical travel time which results when the speed limits are exactly complied with on a section of the route being traveled contained in the part, and the real travel time which the vehicle requires, in particular without taking into account times of a standstill of the vehicle for the travel on the section of the route being traveled contained in the part, is determined, wherein an average value of the quotients which are determined for the parts which are assigned to the speed zone is determined, and wherein the dimension of the driver parameter which characterizes the average speed deviation in the speed zone tolerated by the driver is determined, the mean value of the quotients.It can be provided that the curves measured during journeys of the driver with the vehicle are each provided with information about speed limits on the route being traveled, sections of the routes being traveled on which no speed limits are present being determined, a dimension of the driver parameter characterizing a selected speed on unrestricted freeway sections being determined as a function of an average value of the speeds in the sections of the routes being traveled on which no speed limits are present.It can be provided that parts of the curves are ignored when determining the mean value of the speeds in which the speed falls below a predefined lower speed threshold.It can be provided that the testing of the vehicle component is carried out as a function of the multidimensional driver parameter.An apparatus for determining a multi-dimensional driver parameter for a test of 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, the apparatus executing the method when executed by the at least one processor.A computer program comprises computer-readable instructions, the execution of which by a computer on the computer carries out the method for determining a multidimensional driver parameter for a test of a vehicle component or a vehicle.Further advantageous embodiments can be seen from the following description and the drawing. The drawing shows: FIG. 1 shows a schematic illustration of a device for determining a multidimensional driver parameter for a test of a vehicle component or a vehicle, FIG. 2 shows a flow chart with steps of a method for determining the multi-dimensional driver parameter.FIG. 1 schematically illustrates a device 100 for determining a multidimensional driver parameter for a test of a vehicle component or a vehicle.The apparatus 100 comprises at least one processor 102 and at least one memory 104.The at least one memory 104 comprises instructions executable by the at least one processor 102, the device 100, when executed by the at least one processor 102, executing a method for determining a multi-dimensional driver parameter for a test of a vehicle component or a vehicle.The device 100 comprises a computer, for example. A computer program executable by the computer comprises, for example, the instructions.FIG. 2 shows a flow chart with steps of the method.The method comprises a step 202.In step 202, curves of a speed of the vehicle measured during journeys of a driver with a vehicle are provided.It can be provided that the curves measured during journeys of the driver with the vehicle are each provided with information about speed limits on the route being traveled.The method comprises a step 204.In step 204, a plurality of parts of the curves are identified depending on the height of the speed.For example, a plurality of parts of the profiles are identified, each of which comprises an acceleration from a vehicle standstill or substantially from a vehicle standstill.For example, a plurality of parts of the profiles are identified, each of which comprises deceleration until a vehicle standstill or until substantially a vehicle standstill.It can be provided that an average speed is determined for a plurality of parts of the profiles, wherein a plurality of parts are assigned to a speed zone which comprises the average speed, depending on the average speed determined for the respective part.The method comprises a step 206.In step 206, at least one dimension of the driver parameter is determined depending on the speed in the parts.For example, a dimension of the driver parameter characterizing acceleration tolerated by the driver is determined depending on the speed in the parts comprising the acceleration. For example, a dimension of the driver parameter characterizing a driver-tolerated deceleration is determined depending on the speed in the parts comprising the deceleration.The dimension of the driver parameter characterizing the acceleration tolerated by the driver is determined, for example, depending on the parts in which an acceleration is greater than an acceleration threshold.The dimension of the driver parameter characterizing the acceleration tolerated by the driver comprises, for example, a quantile of the accelerations, in particular a quantile between a 50% quantile or a 90% quantile.It can be provided that the dimension of the driver parameter, which characterizes the acceleration tolerated by the driver, comprises a standard deviation or variance of the acceleration from the parts, which each comprise an acceleration from the standstill of the vehicle or substantially from the standstill of the vehicle.The dimension of the driver parameter characterizing the driver-tolerated delay comprises e.g. a quantile of the delays, in particular a quantile between a 50% quantile or a 90% quantile.It may be provided that the dimension of the driver parameter characterizing the driver-tolerated deceleration comprises a standard deviation or variance of the deceleration from the parts each comprising a deceleration until vehicle standstill or substantially until vehicle standstill.It may be provided that a dimension of the driver parameter characterizing 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.For example, for a speed zone per part associated with the speed zone, an amplitude of a speed oscillation in the part is determined depending on the average speed determined for the part. For example, an average of the amplitudes determined for the parts associated with the speed zone is determined.The dimension of the driver parameter characterizing the driver's driving style in the speed zone comprises, for example, the mean value of the amplitudes.For example, for a speed zone per part associated with the speed zone, a standard deviation or variance of a speed vibration in the part is determined depending on the average speed determined for the part. For example, an average of the standard deviations or variances determined for the parts associated with the speed zone is determined.The dimension of the driver parameter characterizing the driver's driving style in the speed zone comprises, for example, the mean value of the standard deviations or variances.It can be provided that for a speed zone, for each part which is assigned to the speed zone, a quotient is determined from a theoretical travel time which results when the speed limits on a section of the route traveled contained in the part are exactly complied with, and from the real travel time for the section contained in the part, in particular without taking into account times of a vehicle standstill.It can be provided that an average value of the quotients is determined which are determined for the parts which are assigned to the speed zone.The dimension of the driver parameter, which characterizes the average speed deviation tolerated by the driver in the speed zone, comprises, for example, the average value of the quotients.It can be provided that sections of the traveled routes are determined on which no speed limits are present.A dimension of the driver parameter characterizing a selected speed on unlimited highway sections is determined, for example, depending on an average of the speeds in the sections of the traveled routes on which no speed limits are present.It can be provided that parts of the curves are ignored when determining the mean value of the speeds in which the speed falls below a predefined lower speed threshold, e.g., 100 km / h or 80 km / h or 60 km / h.The method optionally comprises a step 208. In step 208, the evaluation of the vehicle component is carried out as a function of the multidimensional driver parameter.For a reliability design of vehicle components, load collective distributions from the field are used, for example. In the early development phase, if there is still no field data present, these distributions are estimated, for example, with the aid of a virtual measurement campage. In this type of test, the behavior of a large number of users is simulated, for example, and the load collective distribution in the field is estimated in this way.Different driver types are modeled in the test via a respective multi-dimensional driver parameter.The method can provide that multidimensional driver parameters for different driver types are provided from the measured curves of a plurality of drivers.The method may provide for the execution of the test with multi-dimensional driver parameters for different driver types.

Claims

Computer-implemented method for determining a multidimensional driver parameter for a test of a vehicle component or a vehicle, characterized in that, when a driver drives with a vehicle, measured profiles of a speed of the vehicle are provided (202), wherein a plurality of parts of the profiles are identified (204) as a function of the height of the speed, wherein at least one dimension of the driver parameter is determined (206) as a function of the speed in the parts.Method according to Claim 1, characterized in that a plurality of parts of the profiles are identified, each of which comprises an acceleration from a vehicle standstill or substantially from a vehicle standstill or a deceleration to a vehicle standstill or to substantially a vehicle standstill, wherein a dimension of the driver parameter which characterizes an acceleration or deceleration tolerated by the driver is determined (206) in the parts.Method according to claim 1, characterized in that a dimension of the driver parameter characterizing a driver-tolerated acceleration is determined (206) depending on the parts in which an acceleration is greater than an acceleration threshold or that a dimension of the driver parameter characterizing a driver-tolerated deceleration is determined (206) depending on the parts in which a deceleration is greater than a deceleration threshold.Method according to either of Claims 2 and 3, characterized in that the dimension of the driver parameter characterizing the acceleration tolerated by the driver comprises (206) 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 each comprising an acceleration from standstill of the vehicle or substantially from standstill of the vehicle, or wherein the dimension of the driver parameter characterizing the deceleration tolerated by the driver comprises (206) 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 comprising a deceleration until standstill of the vehicle or substantially until standstill of the vehicle.Method according to one of the preceding claims, characterized in that an average speed is determined for a plurality of parts of the profiles, wherein a plurality of parts are assigned to a speed zone which comprises 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 (206), depending on the average speeds of the parts assigned to the speed zone.Method according to any one of the preceding claims, characterized in that, for a speed zone per part associated with 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, an average value of the amplitudes determined for the parts associated with the speed zone being determined, and the dimension of the driver parameter characterizing the driving style of the driver in the speed zone comprising the average value of the amplitudes (206).Method according to claim 5, characterised in that for a speed zone per part associated with 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, an average of the standard deviations or variances determined for the parts associated with the speed zone being determined, and the dimension of the driver parameter characterizing the driving style of the driver in the speed zone comprising the average of the standard deviations or variances (206).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 (202) with information about speed limits on the route driven, wherein for a speed zone per part which is assigned to the speed zone a quotient is determined from a theoretical travel time which results when the speed limits are exactly complied with on a section of the route driven contained in the part and from the real travel time which the vehicle requires in particular without taking into account times of a standstill of the vehicle for the travel on the section of the route driven contained in the part, wherein an average value of the quotients which are determined for the parts which are assigned to the speed zone is determined, and wherein the dimension of the driver parameter is determined, which characterizes the average speed deviation tolerated by the driver in the speed zone, which comprises the average value of the quotients (206).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 (202) with information about speed limits on the route being driven, sections of the routes being determined on which no speed limits are present, a dimension of the driver parameter which characterizes a selected speed on unrestricted freeway sections being determined (206) on the basis of an average value of the speeds in the sections of the routes being driven on which no speed limits are present.Method according to Claim 9, characterized in that parts of the curves in which the speed falls below a predefined lower speed threshold (206) are ignored in the determination of the mean value of the speeds.Method according to one of the preceding claims, characterized in that the testing of the vehicle component is carried out (208) as a function of the multidimensional driver parameter.Device (100) for determining a multi-dimensional driver parameter for a test of 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), the device (100), when executed by the at least one processor (102), executing the method according to one of Claims 1 to 11.A computer program, characterized in that the computer program comprises computer readable instructions, the method according to any one of claims 1 to 11 being executed on the computer by a computer.

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