### Abstract

The paper proposes methods for both the analysis and the synthesis of variable-geometry suspension systems. The nonlinear polynomial Sum-of-Squares (SOS) programming method is applied in the analysis and it gives the optimal utilization of the maximum control forces on the tires. Moreover, the construction of the system can be based on the nonlinear analysis. The variable-geometry suspension system affects the wheel camber angle and generates an additional steering angle, thus the coordination of steering and wheel tilting can be handled. An LPV (Linear Parameter-Varying) based control-oriented modeling and control design for lateral vehicle dynamics are also proposed. The novelty of the method is the combination of the LPV-based control design and the SOS-based invariant set analysis. The simulation example presents the efficiency of the variable-geometry suspension system and it shows that the system is suitable to be used as a driver assistance system. In the SIL (software-in-the-loop) simulation both the dSPACE-AutoBox hardware and the CarSim simulator are used as standard industrial tools.

Original language | English |
---|---|

Pages (from-to) | 279-291 |

Number of pages | 13 |

Journal | Control Engineering Practice |

Volume | 61 |

DOIs | |

Publication status | Published - ápr. 1 2017 |

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### ASJC Scopus subject areas

- Control and Systems Engineering
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering

### Cite this

**Nonlinear analysis and control of a variable-geometry suspension system.** / Németh, Balázs; Gáspár, P.

Research output: Article

*Control Engineering Practice*, vol. 61, pp. 279-291. https://doi.org/10.1016/j.conengprac.2016.09.015

}

TY - JOUR

T1 - Nonlinear analysis and control of a variable-geometry suspension system

AU - Németh, Balázs

AU - Gáspár, P.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - The paper proposes methods for both the analysis and the synthesis of variable-geometry suspension systems. The nonlinear polynomial Sum-of-Squares (SOS) programming method is applied in the analysis and it gives the optimal utilization of the maximum control forces on the tires. Moreover, the construction of the system can be based on the nonlinear analysis. The variable-geometry suspension system affects the wheel camber angle and generates an additional steering angle, thus the coordination of steering and wheel tilting can be handled. An LPV (Linear Parameter-Varying) based control-oriented modeling and control design for lateral vehicle dynamics are also proposed. The novelty of the method is the combination of the LPV-based control design and the SOS-based invariant set analysis. The simulation example presents the efficiency of the variable-geometry suspension system and it shows that the system is suitable to be used as a driver assistance system. In the SIL (software-in-the-loop) simulation both the dSPACE-AutoBox hardware and the CarSim simulator are used as standard industrial tools.

AB - The paper proposes methods for both the analysis and the synthesis of variable-geometry suspension systems. The nonlinear polynomial Sum-of-Squares (SOS) programming method is applied in the analysis and it gives the optimal utilization of the maximum control forces on the tires. Moreover, the construction of the system can be based on the nonlinear analysis. The variable-geometry suspension system affects the wheel camber angle and generates an additional steering angle, thus the coordination of steering and wheel tilting can be handled. An LPV (Linear Parameter-Varying) based control-oriented modeling and control design for lateral vehicle dynamics are also proposed. The novelty of the method is the combination of the LPV-based control design and the SOS-based invariant set analysis. The simulation example presents the efficiency of the variable-geometry suspension system and it shows that the system is suitable to be used as a driver assistance system. In the SIL (software-in-the-loop) simulation both the dSPACE-AutoBox hardware and the CarSim simulator are used as standard industrial tools.

KW - LPV control design

KW - Performance and stability analysis

KW - SOS programming method

KW - Tire characteristics

KW - Variable-geometry suspension system

UR - http://www.scopus.com/inward/record.url?scp=85001848930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85001848930&partnerID=8YFLogxK

U2 - 10.1016/j.conengprac.2016.09.015

DO - 10.1016/j.conengprac.2016.09.015

M3 - Article

AN - SCOPUS:85001848930

VL - 61

SP - 279

EP - 291

JO - Control Engineering Practice

JF - Control Engineering Practice

SN - 0967-0661

ER -