Method for performing a test run on a test stand

A test-bed, experimental technology, applied in vehicle testing, engine testing, general control systems, etc., to solve problems such as simulated stagnation, inability to compare real situations, and deviations between simulated positions and reference positions

Pending Publication Date: 2021-08-13
AVL LIST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem in this case is that the conditions on the test bench cannot be compared with the real conditions of the vehicle on the real road under the standardized test cycle
This in turn leads to problems when simulating or duplicating, e.g. due to high, incorrectly simulated side accelerations
Furthermore, in the case of position-dependent simulated speeds, after stopping at a certain reference position, it is not possible to start and the simulation thus stalls
[0015] A time-based determination of the simulated velocity thus results in a deviation of the simulated position from the reference position, a position-based determination of the simulated velocity results in a deviation of the simulated time from the reference time

Method used

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

Examples

Experimental program
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Embodiment Construction

[0043] FIG. 1 shows a typical test stand 1 for a test object 2 , here an engine test stand for an internal combustion engine. The test piece 2 is here connected (for example via a connecting shaft as shown in FIG. 1 ) to the loading machine 3 . However, the test piece 2 can also comprise a drive train, the entire vehicle, individual or multiple components, such as transmissions, batteries, etc. The test stand 1 can thus be, for example, a drive train test stand or a roller test stand, in which more than one loader 3 can also be arranged, for example one loader per half-shaft or per axle. Here, a test piece 2 is run on a test bench 1 according to prespecified parameters of a test run in order to obtain conclusions on certain measured parameters m of the vehicle, such as emissions of harmful substances, consumption, acoustic properties of the vehicle, mobility of the vehicle , the durability of the vehicle, tips for configuring / optimizing individual components, and more. At th...

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Abstract

The aim of the invention is to reduce the deviation (x) of a comparison simulation value from a comparison reference value (ref) in the performance of a test run on a test stand (1) with a test object (2), in which test run a number of simulation values (sim) is simulated by a simulation unit (4) by means of a number of specified reference values (ref). This aim is achieved, according to the invention, in that a corrected reference value (ref') is determined, starting from a selected reference value (ref) from the number of reference values, the corrected reference value (ref') is specified to the simulation unit (4), instead of the selected reference value (ref), for the simulation of a corrected simulation value (sim'), and the at least one target value (T) is determined using the corrected simulation value (sim').

Description

technical field [0001] The invention relates to a method for carrying out a test run on a test bench with a test piece, in which a number of reference values ​​are assigned to a simulation unit by a reference unit, wherein the simulation is simulated by the simulation unit using the number of reference values A plurality of analog values, wherein at least one set value and at least one control value for controlling the test piece are determined from the plurality of analog values. [0002] Furthermore, the invention relates to a test rig, which carries out a test run with a test piece, in which a reference unit is provided which assigns a number of reference values ​​to a simulation unit, wherein the simulation unit is designed in such a way that the In this case, several analog values ​​are simulated, from which at least one setpoint value is determined and transmitted to the control unit, wherein the control unit is designed to specify at least one control value for controll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19G01M15/02G01M17/00
CPCG01M15/00G05B19/19G01M15/02G01M17/00G05B2219/35581
Inventor E·库尔勒A·弗莱克
Owner AVL LIST GMBH
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