Fahrbarkeitsuntersuchungen auf dem Rollenprüfstand

Nehlsen, Markus; Jedicke, Frank; Bogner, Erik; Schöggl, Peter

doi:10.1007/bf03221788

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…It was shown in [36] that significant divergences exist between the on-road emissions and fuel consumption measurements and the driving cycles' measurements on the chassis dynamometer. It was also proven in [20] that slip at the contact point between the vehicle's tires and the dynamometer's rollers leads to unmanageable inconsistency in emission measurements, while tightening the vehicle restraints may increase emissions and energy consumption. A conclusion was made in [37] that the uncertainty in determining the road load coefficients, i.e., typically the so-called ABC factors, will significantly affect the reliability of the test measurements for the vehicle system.…”

Section: Nedc and Wltp2 Driving Cycles Results From The Dynamometer T...mentioning

confidence: 99%

“…This restraint does not establish any constraints to the vertical axis, preventing additional vertical forces into the vehicle. However, the restraint should be sufficiently stiff in dynamic operations to prevent displacements during the test course [10,13,20]. Two methods of retaining the test vehicle on a chassis dynamometer are examined in [11]: the typical strap tie-down restraint and an adjustable barrier/corner restraint.…”

Section: Limitations Of Chassis Roller Dynamometermentioning

confidence: 99%

“…The tire's contact patch is different for roller contact (L LT ) than for flat surface contact (L LE ), as shown in Figure 24. The ratio between the two cases is also estimated in [20] with a correction factor e Cα , as shown in Equation (47). This concept is employed in this work to estimate the variable (L) in Equations ( 43) and (45), which enables a comparison between on-road testing and the rollers of the dynamometer.…”

Section: Friction Tire Modelmentioning

confidence: 99%

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Thorough Analysis of the Reliability of Measurements on Chassis Roller Dynamometer and Accurate Energy Consumption Estimation for Electric Vehicles

Alhanouti,

Gauterin

2023

Energies

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The energy consumption of the electric test vehicle on the roller dynamometer test bench is thoroughly investigated in this work. Initially, we extensively examined the relevant testing approaches on chassis dynamometer test benches. Then, we presented the main issues and limitations of this type of testing facility. After that, an experimental analysis was performed by recording the NEDC and the WLTP-class 2 standard driving cycle test data. It was found that the power consumption associated with specific test maneuvers could be accurately simulated via the roller dynamometer system. However, the experimental test results showed some disparities compared to the expected results from the simulation models. These findings supported identifying the dynamic behavior resulting from the tire and roller contact. The LuGre friction model provided the solution, incorporating friction-related physical models such as stick-slip and the Stribeck effect. In addition, adjustments were made to the LuGre model to consider the dynamic influences of the roller on the tire. Finally, we created a systematic estimation model for energy consumption by integrating the boundary conditions of the test bench, a generic model for energy estimation of electric vehicles, and the proposed tire–roller contact model. The overall model requires only the measured traction speed of the test vehicle and the auxiliary energy losses as physical inputs. The results proved that the proposed model enabled the estimation of the total power consumption with high accuracy.

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Section: Nedc and Wltp2 Driving Cycles Results From The Dynamometer T...mentioning

confidence: 99%

Section: Limitations Of Chassis Roller Dynamometermentioning

confidence: 99%

Section: Friction Tire Modelmentioning

confidence: 99%

See 1 more Smart Citation

Thorough Analysis of the Reliability of Measurements on Chassis Roller Dynamometer and Accurate Energy Consumption Estimation for Electric Vehicles

Alhanouti,

Gauterin

2023

Energies

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“…So, the loading machines will be coupled to the vehicle's powertrain [1,2]. This setup establishes high stability and allows the powertrain to operate without restraint while the wheel-hubs are attached to electrical load machines [3]. Therefore, powertrain test benches are practical tools for highly dynamic driving condition simulation and advanced driving assistance systems applications.…”

Section: Introductionmentioning

confidence: 99%

Robust Speed Control of a Multi-Mass System: Analytical Tuning and Sensitivity Analysis

Alhanouti,

Gauterin

2023

Applied Sciences

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The regeneration of highly dynamic driving maneuvers on vehicle test benches is challenging due to several influences, such as power losses, vibrations in the overall system that involves the vehicle with the test bench, uncertainties in the model parameterization, and time delays from both the test bench and the measurement systems. In order to improve the dynamic response of the vehicle test bench and to overcome system disturbances, we employed different types of control algorithms for a mechanical multi-mass model. First, those controllers are extensively investigated in the frequency domain to analyze their stability and evaluate the noise rejection quality. Then, the expectations from the frequency analysis are confirmed in a time-domain simulation. Furthermore, sensitivity analysis tests were conducted to evaluate each controller’s robustness against the modeling parameters’ uncertainty. The linear quadratic controller with integral action demonstrated the best compromise between performance and robustness.

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