Objectification methods for ride comfort

Enders, Erik; Burkhard, Georg; Fent, Felix; Lienkamp, Markus; Schramm, Dieter

doi:10.1007/s10010-019-00361-6

Cited by 15 publications

(4 citation statements)

References 28 publications

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“…The authors performed a comparison of objectification methods for ride comfort. The results indicate, that the standardized methods are more robust and reliable than methods developed by other researchers [9]. All of these methods have in common that they objectify the ride comfort (vibration discomfort) as perceived by an untrained customer.…”

Section: Objective Performance Measuresmentioning

confidence: 81%

“…However, this all changes when it comes to automated and autonomous vehicles, as there is a lack of accumulated experience, and it is not clear how the customer preferences might change. Previous studies of the authors indicate a demand for increased comfort during an automated drive [7][8][9]. This is in conflict with traditional driving-dynamics requirements where requirements placed on longitudinal and lateral dynamics generally have priority over comfort, except in the case of luxury vehicles.…”

Section: Introductionmentioning

confidence: 88%

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Analysis of the Influence of Suspension Actuator Limitations on Ride Comfort in Passenger Cars Using Model Predictive Control

2020

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Active suspension systems help to deliver superior ride comfort and can be used to resolve the objective conflict between ride comfort and road-holding. Currently, there exists no method for analyzing the influence of actuator limitations, such as maximum force and maximum rate of change, on the achievable ride comfort. This research paper presents a method that is capable of doing this. It uses model predictive control to eliminate the influence of feedback controller performance and to integrate both actuator limitations and necessary constraints on dynamic wheel-load variation and suspension travel. Various scenarios are simulated, such as driving over a speed bump and inner city driving, as well as driving on a country road and motorway driving, using a state-of-the-art quarter-car model, parameterized for a luxury class vehicle. It is analyzed how comfort, or in one scenario road-holding, can be improved with consideration for the actuator limitations. The results indicate that actuator rate limitation has a strong influence on vertical vehicle dynamics control system performance, and that relatively small maximum forces of around 1000 to 2000 N are sufficient to successfully reject disturbances from road irregularities, provided the actuator is capable of supplying the forces at a sufficiently high rate of change.

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Section: Objective Performance Measuresmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 88%

Analysis of the Influence of Suspension Actuator Limitations on Ride Comfort in Passenger Cars Using Model Predictive Control

2020

Self Cite

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“…11 The standardized evaluation methods are more suitable for predicting vibration comfort. 12 These results are related to stochastic roadway excitations. A method for the prediction of the subjective comfort impression during single-obstacle crossings is provided by Fischer-von Ro¨nn.…”

Section: Introductionmentioning

confidence: 93%

Acceleration signal simulation induced by single obstacle crossings by means of nonlinear, block-oriented models for an automotive comfort simulator

Reichel

Meywerk

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper presents a method for replicating transient signals induced in a passenger car by single-obstacle crossings. These replicated signals should be used in a ride comfort simulator. By using feedforward-inverse-model-control with direct identification of the inverse transfer function, time-consuming iterations of conventional time waveform replication methods are eliminated. The quality of the system identification for approximating the inverse transfer function is significantly increased by decomposing the frequency band and the complexity is considerably reduced. The use of nonlinear block-oriented models significantly decreases the replication errors in frequency bands with high nonlinearity influence.

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“…The evaluation of the vibration comfort by lifting and pitching motions [7] or the evaluation in case of pulsed interference [8] are well-known evaluation methods. In comparison of these methods, the standardized approaches are more suitable for the evaluation of comfort [9]. The changed framework conditions resulting from autonomous driving open up further fields of research.…”

Section: Introductionmentioning

confidence: 99%

A MIMO system for the replication of accelerations excited in a vehicle by single obstacle crossings at comfort-relevant excitation points in a comfort simulator

Reichel¹,

Meywerk²

2023

J. vibroeng.

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This paper presents the replication of accelerations in a vehicle excited from single obstacle crossings. The accelerations should be replicated at multiple comfort-relevant excitation points in a comfort-simulator. For the vertical accelerations at the seat rails and the foot rests, research on the positions and the number of shakers is conducted. The implementation of an electrodynamic shaker for each controlled measurement point turns out to be mandatory. By positioning them at the left and right seat rails, errors can be minimized due to similarities in the transmission behavior. The longitudinal excitations of the seat back by means of shakers are performed very precisely. The direct coupling by a construction on the headrest allows fast exchange of the vehicle seats. The combination of all acceleration replications simultaneously can be performed satisfactorily comparing them with in-vehicle field measurements. The noise-based excitation signal for system identification turns out to be a significant parameter.

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Objectification methods for ride comfort

Cited by 15 publications

References 28 publications

Analysis of the Influence of Suspension Actuator Limitations on Ride Comfort in Passenger Cars Using Model Predictive Control

Analysis of the Influence of Suspension Actuator Limitations on Ride Comfort in Passenger Cars Using Model Predictive Control

Acceleration signal simulation induced by single obstacle crossings by means of nonlinear, block-oriented models for an automotive comfort simulator

A MIMO system for the replication of accelerations excited in a vehicle by single obstacle crossings at comfort-relevant excitation points in a comfort simulator

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