Event-triggered control for active vehicle suspension systems with network-induced delays

Wang, Gang; Chadli, Mohammed; Chen, Haihong; Zhi-jin, Zhou

doi:10.1016/j.jfranklin.2018.10.012

Cited by 80 publications

(29 citation statements)

References 38 publications

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“…The principle of power shift [6][7][8] is to ensure the continuous power transmission during the shift by the sliding friction of the wet clutch, which is very important for tractors that often work in heavy load conditions. The hydrostatic power split CVT is a complex mechanic-electronic-hydraulic integrated system, which requires high robustness and reliability for each subsystem [9][10][11]. Once the hydraulic system that controls the clutches fails, it may affect the driving comfort and even endanger the driving safety during the shift [12,13].…”

Section: Introductionmentioning

confidence: 99%

Study on the Shifting Quality of the CVT Tractor under Hydraulic System Failure

Wang

Song

Wang³

et al. 2020

Applied Sciences

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The failure of a hydraulic system will affect the shifting quality and driving safety of a CVT tractor. In order to reveal the response of the tractor under different hydraulic system failures without destroying the transmission, the following methods are proposed in this paper: firstly, building the simulation model of CVT; secondly, building a test bench to test and verify the transmission model to ensure that the simulation model can accurately predict the response of CVT under different clutch oil pressures; thirdly, obtaining the fault oil pressure data without starting the engine and taking the data of fault oil pressure as the input variable of the simulation model; finally, obtaining the response of the CVT tractor under different hydraulic system failures by simulation. It is found that the damage of the seal ring inside the rotary joint has little effect on shifting quality; oil way block can lead to greater shift impact; when seal ring damage and oil way block occur together, the clutch cannot reach the minimum working pressure; clutch piston jamming and oil leak can cause power interruption of the tractor. The results show that it is feasible to study the response of CVT in fault mode by simulation.

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Section: Introductionmentioning

confidence: 99%

Study on the Shifting Quality of the CVT Tractor under Hydraulic System Failure

Wang

Song

Wang³

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Hence, a great deal of effort has been devoted to the studies of active and semi-active suspensions in recent years. [1][2][3][4][5][6] Various control strategies are presented to improve the performance of the suspension such as sliding mode control, fuzzy control, H 1 control and so on.…”

Section: Introductionmentioning

confidence: 99%

Control parameter optimization of a nonlinear vehicle suspension system with time-delayed acceleration feedback

Sun

2020

Journal of Low Frequency Noise, Vibration and Active Control

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A time-delayed acceleration feedback control is proposed to improve the vibration performance of a nonlinear vehicle suspension system. First, the harmonic balance method is applied to obtain the vertical acceleration amplitude of the system excited by simple harmonic road excitation. Then, taking the amplitude of the sprung mass acceleration and control force into account, the single-objective and multiple-objective optimization problems of time-delayed feedback control parameters, respectively, are discussed. Finally, the mathematical simulation is provided to verify the correctness of the optimization results. It is concluded that the nonlinear suspension with optimal time-delayed feedback control has better vibration control performance compared to passive one. The acceleration amplitude of the sprung mass is significantly reduced by the single-objective optimization of the control parameters. Moreover, when the optimal time delay is introduced, the active control force input is fewer than that without time delay. The phenomenon of energy transfer between the sprung mass and the unsprung mass is observed in some road-excitation frequencies.

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“…The vehicle suspension systems have attracted a great deal of attention of both academics and engineers over the past few years, due to their great contributions to ride comfort, suspension packaging and road holding. [1][2][3] It is well recognized that passive suspension and semi-active suspension cannot satisfy the drivers' and passengers' tight requirements under different road conditions. Therefore, active suspension is paid considerable interest, which has the ability to add and dissipate energy from system by using a force actuator, so as to achieve a remarkable vibration isolation effect.…”

Section: Introductionmentioning

confidence: 99%

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

Zhao

et al. 2020

Journal of Low Frequency Noise, Vibration and Active Control

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This study investigates the vibration control issue of active suspension systems. Unlike previous results that neglect the actuator dynamics or consider the impractical symmetrical hydraulic cylinder model, this paper incorporates more reasonable asymmetric electrohydraulic actuator into active suspension system and derives its dynamic model. However, whether active suspension or electrohydraulic actuator suffers from nonlinearities (e.g. nonlinear spring, nonlinear damper and nonlinear actuator dynamics) and parameters uncertainties (e.g. the variations of sprung mass and hydraulic fluid’s bulk modulus as well as hydraulic cylinder original control volumes) , which were rarely synthetically considered in the existing researches.To address these issues, we develop a novel dual adaptive robust controller (ARC). An ARC is firstly designed for main-loop system for stabilizing the car body and improving ride comfort in the presence of nonlinearities and parameter uncertainties as well as road disturbances. In order to meet the constraints requirements of suspension system, the tunable parameters in main-loop control law are optimized by solving linear matrix inequality with kidney-inspired algorithm. Another ARC is further synthesized for sub-loop system to deal with the nonlinear and uncertain dynamics in electrohydraulic actuator for ensuring the force tracking performance. Meanwhile, the uncertain parameters are estimated online to compensate the model deviation. The terminal control law is able to guarantee the asymptotic stability of close-loop system within Lyapunov framework. Finally, the effectiveness and robustness of the proposed controller are demonstrated via excessive simulation experiments over different road conditions.

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Event-triggered control for active vehicle suspension systems with network-induced delays

Cited by 80 publications

References 38 publications

Study on the Shifting Quality of the CVT Tractor under Hydraulic System Failure

Study on the Shifting Quality of the CVT Tractor under Hydraulic System Failure

Control parameter optimization of a nonlinear vehicle suspension system with time-delayed acceleration feedback

Dual adaptive robust control for uncertain nonlinear active suspension systems actuated by asymmetric electrohydraulic actuators

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