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Method and device for performing a test run on a test stand

A technology of test operation and test bench, which is applied in the direction of measuring device, vehicle test, mechanical component test, etc., can solve problems such as insufficient, high tire model maintenance cost, complex tire model, etc., and achieve the effect of simplified integration

Active Publication Date: 2017-09-26
AVL LIST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Control cycle times of typically 1-3kHz are achievable with this method, but this is not sufficient for close to realistic high dynamic test runs
[0005] However the maintenance cost of the tire model as in EP 1037030 B1 is relatively high since the whole tire model can become quite complex
Besides, changing or adjusting the tire model - even just a part of it - is difficult for that reason
Finally, the tire model is also inflexible, since the implemented tire model is fixed

Method used

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  • Method and device for performing a test run on a test stand
  • Method and device for performing a test run on a test stand
  • Method and device for performing a test run on a test stand

Examples

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Embodiment Construction

[0022] figure 1 A tire 1 on a generally curved roadway 2 is schematically shown. The tire 1 stands on the roadway 2 at the wheel supporting point P ( figure 1 shows the tangential plane 3) of the curved road 2 at the wheel bearing point P and the tire 1 around the axis of rotation y with respect to the center C of the wheel c turn. The tire 1 stands here on the roadway 2 not at a point P, but on the tire contact surface, generally referred to as the tire footprint L. As shown in FIG. For the following considerations, the right-handed coordinate system is used as the starting point, such as figure 1 shown. The x-axis corresponds to the trajectory of the tire 1 . The y-axis is the axis of rotation y passing through the wheel support point P c and the z-axis is a straight line passing through the wheel support point P and the wheel center C. The wheel bearing point P is thus the point at which the distance between the curved roadway 2 and the wheel center C is minimized...

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Abstract

The problem addressed by the invention is that of making the handling of a tire model for the control of a test run on a test stand (11) easier and more flexible and thus more practical. This problem is solved in that at least a longitudinal velocity (vx) of a tire (1) is calculated in a first simulation unit (30) by means of a first simulation model (33) and the longitudinal velocity (vx) is transmitted to a second simulation unit (35), a longitudinal force (Fx) and / or a rolling resistance torque (My) of the tire (1) is calculated on the basis of the longitudinal velocity (vx) in the second simulation (35) by means of a second simulation model (36), and a dynamometer setpoint value (SD) for a drive control unit (34) of a loading machine (17) of the test stand (11) is determined by means of the longitudinal force (Fx) and / or the rolling resistance torque (My).

Description

technical field [0001] The invention relates to a method for carrying out test runs on a test bench, wherein a test piece is loaded by means of a load machine and the load machine is controlled by a drive control unit which uses at least one dynamometer to be adjusted to The load machine is controlled to a target value, said at least one dynamometer target value being calculated by simulation, and the invention also relates to a related device for controlling a test bench for carrying out a test run. Background technique [0002] In order to carry out near-realistic test runs on test benches for testing vehicles or vehicle components (DUTs), such as vehicles, powertrains, internal combustion engines, transmissions, traction batteries, etc., suitable simulation models have been increasingly used in recent years to Simulates the vehicle, the test track, the vehicle environment, the interaction between the vehicle and the roadway, and the driver in order to calculate from them ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/00
CPCG01M13/025G01M17/007G01M17/0074G01D1/16
Inventor F·普菲斯特M·施密特C·雷策
Owner AVL LIST GMBH