Adaptive ride comfort and attitude control of vehicles equipped with active hydro-pneumatic suspension

Saglam, Ferhat; Ünlüsoy, Y. Samim

doi:10.1504/ijvd.2016.078764

Cited by 10 publications

(12 citation statements)

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“…a ca tan (θ s ) + g (14) where 𝑎 is centrifugal acceleration and 𝜃 is the desired roll angle of the car body.…”

Section: Problem Formulation Of Four Degrees Of Freedom (4-dof) Half-car Modelmentioning

confidence: 99%

“…where a ia is inertial acceleration. The desired roll angle in (14) and desired pitch angle in (17) are derived to eliminate the external lateral and longitudinal forces acting on the passengers. These forces are cancelled out such that the gravitational force counterbalances the lateral and longitudinal forces except for the normal forces.…”

Section: Desired Pitch Anglementioning

confidence: 99%

“…A model-based estimation for vehicle yaw rate, side slip and roll angle is designed to achieve an accurate simultaneous estimation of these parameters. A state-dependent Riccati equation-based control method for hydro-pneumatic suspension is investigated in [14] to improve the ride comfort and vehicle attitude motion performance. Basrah et al [15] designed a linear and non-linear model predictive control to regulate wheel slip with proportional braking torque.…”

Section: Introductionmentioning

confidence: 99%

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Predictive Control Using Active Aerodynamic Surfaces to Improve Ride Quality of a Vehicle

et al. 2020

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This work presents a predictive control strategy for a four degrees of freedom (DOF) half-car model in the presence of active aerodynamic surfaces. The proposed control strategy consists of two parts: the feedback control deals with the tracking error while the feedforward control handles the anticipated road disturbance and ensures the desired maneuvering. The desired roll and pitch angles are obtained by using disturbance, vehicle speed and radius of curvature. The proposed approach helps the vehicle to achieve better ride comfort by suppressing the amplitude of vibrations occurring in the vertical motion of the vehicle body, and enhances the road-holding capability by overcoming the amplitude of vibrations in tyre deflection. The control strategy also cancels out the hypothetical forces acting on the vehicle body to help the vehicle to track the desired attitude motion without compromising the ride comfort and road-holding capability. The simulations results show that the proposed control strategy successfully reduces the root mean square error (RMSE) values of sprung mass acceleration as well as tyre deflection.

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“…a ca tan (θ s ) + g (14) where 𝑎 is centrifugal acceleration and 𝜃 is the desired roll angle of the car body.…”

Section: Problem Formulation Of Four Degrees Of Freedom (4-dof) Half-car Modelmentioning

confidence: 99%

Section: Desired Pitch Anglementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predictive Control Using Active Aerodynamic Surfaces to Improve Ride Quality of a Vehicle

et al. 2020

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“…The active hydro-pneumatic suspension system consists of the suspension mechanical structure and the active force implementation part. The hydro-pneumatic suspension system 1 Grosjean R. has obvious parameter uncertainty and relatively strong nonlinear characteristics (Kim and Lee, 2011;Saglam and Unlusoy, 2016;Halfinann and Hung, 2017;Halfmann et al, 2017). The traditional method is to use a linear controller to act on the suspension system, which has low control accuracy and limited system performance effect, thus unable to meet the requirements (Wang and Suh, 2017), Use genetic algorithm to optimize target parameters and improve system performance (Li et al, 2005;Du and Wei, 2011).…”

Section: Introductionmentioning

confidence: 99%

Damping Control and Experiment on Active Hydro-Pneumatic Suspension of Sprayer Based on Genetic Algorithm Optimization

et al. 2021

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High ground clearance self-propelled sprayers usually work in complex road conditions. Due to the large body mass, wide spray boom breath and high center of gravity, the body and spray boom swing sharply during work, which affects operation quality and even endangers safety. This paper proposes a control plan for timely-started active hydro-pneumatic suspension, and designs a fuzzy PID control system based on genetic algorithm optimization. First, MATLAB software is used to simulate and analyze the model, so that the fuzzy PID control optimized by genetic algorithm is obtained. When the sprayer drives on D-grade road, as the speed increases, in comparison between the damping effect of the active suspension and traditional passive suspension, the corresponding root mean square value of vehicle body vibration acceleration decreases by 11.36 and 12.36%, respectively. On the E-grade road surface, with the increase of speed, the corresponding root mean square value of vehicle body vibration acceleration decreases by 13.25 and 14.89%, respectively. Based on indoor bench experiments, the proposed control strategy was verified. Under field road excitation, when the sprayer traveled at 5 km/h, the root mean square acceleration values of the passive and active suspensions were 1.080 and 0.847 m/s2, respectively; when the sprayer traveled at 8 km/h, the root mean square acceleration values of the passive and active suspensions were 1.412 and 1.125 m/s2, respectively, with the root mean square values of vibration acceleration reduced by 21.57 and 20.33%, respectively. Under sand-gravel road condition, when the sprayer traveled at 5 km/h, the root mean square acceleration values of the passive and active suspensions were 1.149 and 0.891 m/s2, respectively; when the sprayer traveled at 8 km/h, the root-mean-square acceleration values of the passive and active suspensions were 1.572 and 1.229 m/s2, respectively, with the root mean square values of vibration acceleration reduced by 22.45 and 21.82%, respectively. During the active control process, the suspension displacement is always kept within the limited range, and as the vehicle speed and road surface level increase, the active suspension has a significantly better damping effect than the passive suspension, which proves effectiveness of the active damping scheme.

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“…The existing vehicle vertical vibration reduction system is mainly designed according to the track (road surface) irregularity [4,5]. Wei et al [6] used the proposed dynamic model for a safety analysis and a vibrationreduction evaluation to theoretically validate the feasibility of semi-active magneto-rheological steel-spring FST.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and analysis of vertical vibration reduction system for passenger train

Dong

Meng

Song

et al. 2021

mech

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Based on wheel-rail impact vibration and considering the body stiffness and natural damping, this paper builds a four-degree-of-freedom vibro-impact system model for passenger train’s vertical vibration reduction system. The Poincaré map of the system is determined by the analytic solution of the system derived from the motion differential equation of the multi-degree-of-freedom vibro-impact system combined with Newton's second law. It is found that the fork bifurcation, Hopf bifurcation and other dynamical behavior leading to Chaos when the system parameters are changed. On this basis, the dynamic parameters of the train are optimized to avoid chaos in the train operation, reduce the vertical vibration of the train, improve the stability and comfort of the train operation, and provide the theoretical basis for the active vibration reduction design of the train.

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Adaptive ride comfort and attitude control of vehicles equipped with active hydro-pneumatic suspension

Cited by 10 publications

References 0 publications

Predictive Control Using Active Aerodynamic Surfaces to Improve Ride Quality of a Vehicle

Predictive Control Using Active Aerodynamic Surfaces to Improve Ride Quality of a Vehicle

Damping Control and Experiment on Active Hydro-Pneumatic Suspension of Sprayer Based on Genetic Algorithm Optimization

Dynamic modeling and analysis of vertical vibration reduction system for passenger train

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