Reference model based adaptive control of a hybrid suspension system

Koch, Guido; Spirk, Sebastian; Lohmann, Boris

doi:10.3182/20100712-3-de-2013.00177

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…The ride safety index is chosen to be the dynamic wheel load F dyn , which should be bounded. More details about the system requirements can be found in [9] and in [10]. The test rig used for the experiments is shown in Fig.…”

Section: System Requirements and Sensor Conceptmentioning

confidence: 99%

Experimental validation of a new model-based control strategy for a semi-active suspension system

Pellegrini

Spirk

Pletschen

et al. 2012

2012 American Control Conference (ACC)

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Aiming at the control of a continuously variable hydraulic semi-active damper, in this paper a dynamic feedforward control approach is combined with a feedback component. In order to track reference forces from higher level suspension controllers, in practice, the damper current inputs are mainly calculated by means of static damper characteristics. Thereby, dynamic effects of the damper force generation are neglected. By taking the dynamic damper behavior into account, the model used in the proposed feedforward control component describes the damper behavior considerably better than the state of the art. Moreover, the additional feedback element further improves the precision of the actual provided damping force. The new concept is validated in real-time experiments on a quarter-car test rig for a semi-active suspension system. Using a skyhook law, its performance is analyzed in comparison to the static characteristic-based control. As better force tracking is provided, the proposed model-based strategy is able to improve ride comfort and ride safety simultaneously.

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Section: System Requirements and Sensor Conceptmentioning

confidence: 99%

Experimental validation of a new model-based control strategy for a semi-active suspension system

Pellegrini

Spirk

Pletschen

et al. 2012

2012 American Control Conference (ACC)

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“…In some works an approximation of the damper dynamics has been considered introducing first order lag elements for the currents and for the force dynamics with different time constants (see e.g. Koch et al (2010b)). Due to their complexity, hysteresis phenomena have been a subject of intensive mathematical and engineering research, see e.g.…”

Section: Introductionmentioning

confidence: 99%

A dynamic feedforward control approach for a semi-active damper based on a new hysteresis model

Pellegrini

Koch

Spirk

et al. 2011

IFAC Proceedings Volumes

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“…FREQUENCY-SELECTIVE CONTROL CONCEPT The controller concept examined in this paper is based upon the adaptive control approach proposed in Koch et al (2010b) and experimentally validated in Koch et al (2011b). The idea of the original concept is to determine the desired suspension forces by means of a passive suspension setting (natural frequency f c and damping ratio D c of the sprung mass) that is most suited for the current driving state.…”

Section: System Specificationmentioning

confidence: 99%

“…Other quantities needed for control purposes, such as the damper relative velocityẑ cw and the dynamic tire loadF dyn , are estimated by means of a signal-based filtering approach, see Koch et al (2010b). The passive suspension configuration is realized by keeping the spring mount adjustment at a constant level and applying a constant current to the damper valves such that a medium damper characteristic results.…”

Section: Suspension Modelmentioning

confidence: 99%

“…The potential of the respective actuator configurations can best be exploited when an adaptive control law is applied, i. e. when there is not a fixed trade-off between ride comfort and ride safety, but rather a shift in controller parameterization according to the current vehicle states and road characteristics. This idea has been taken on in Koch et al (2010b), where the hybrid actuator combination is used to emulate the dynamic behavior of a passive reference model with time-variant stiffness and damping that is optimally tuned for the current driving state, Fig. 1 (ri.).…”

Section: Introductionmentioning

confidence: 99%

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Frequency-Selective Adaptive Control of a Hybrid Suspension System

Pletschen

Spirk

Lohmann

2013

IFAC Proceedings Volumes

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This paper deals with a frequency-selective reference model that is used within an adaptive control structure for mechatronic vehicle suspensions. Based on a hybrid actuator configuration which consists of a slow-active actuator and a semi-active damper, the basic idea of the control approach is to emulate the dynamic behavior of a passive, but time-variant reference suspension being optimally attuned for the current driving state. The new reference incorporates the limited bandwidth of the active device in the design step and is also able to address the divergent damping demand of sprung and unsprung mass of modern vehicles. An additional potential of the resulting frequency-selective reference model of up to 25 % in comfort is revealed in comparison to the original reference without frequency-dependent properties. However, as suggested by a comparative study in terms of simulation results of a quarter-car setting based on real series suspension components this potential depends heavily on the restrictions that are imposed by the available damper characteristics.

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Reference model based adaptive control of a hybrid suspension system

Cited by 11 publications

References 7 publications

Experimental validation of a new model-based control strategy for a semi-active suspension system

Experimental validation of a new model-based control strategy for a semi-active suspension system

A dynamic feedforward control approach for a semi-active damper based on a new hysteresis model

Frequency-Selective Adaptive Control of a Hybrid Suspension System

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