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Journal articles on the topic 'Half Car Model Suspension'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Zhang, Hailong, Ning Zhang, Fuhong Min, Subhash Rakheja, Chunyi Su, and Enrong Wang. "Coupling Mechanism and Decoupled Suspension Control Model of a Half Car." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/1932107.

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A structure decoupling control strategy of half-car suspension is proposed to fully decouple the system into independent front and rear quarter-car suspensions in this paper. The coupling mechanism of half-car suspension is firstly revealed and formulated with coupled damping force (CDF) in a linear function. Moreover, a novel dual dampers-based controllable quarter-car suspension structure is proposed to realize the independent control of pitch and vertical motions of the half car, in which a newly added controllable damper is suggested to be installed between the lower control arm and connec

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2

Unguritu, Maria-Geanina, Teodor-Constantin Nichițelea, and Dan Selișteanu. "Design and Performance Assessment of Adaptive Harmonic Control for a Half-Car Active Suspension System." Complexity 2022 (July 5, 2022): 1–14. http://dx.doi.org/10.1155/2022/3190520.

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The vehicle suspension system is represented by a complex group of components which connect the wheels to the frame or body. Its primary function is to reduce or absorb various vehicle vibrations generated by road disturbances, providing comfort and safety for passengers. Most modern vehicles have independent, active, or semiactive front and rear suspensions which allow the use of electronic actuation. For this reason, automotive engineers conduct research on the active suspension model to determine the most suitable control algorithm. Three active suspension models are intensely used within s

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3

Nagy, Ramona, and Karoly Menyhardt. "Study of a Half Car Suspension Model." Applied Mechanics and Materials 430 (September 2013): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amm.430.191.

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In this paper, a model with four degrees of freedom is studied to assess the discomfort of car passengers due to vibrations. The response of the half car model due to road irregularities is presented in order to attain a control method for the dampers. For the analytical study, the differential equations of the motion were written in order to determine the critical frequencies. The resulted model takes into account both the forced and damped solution for a numerical case, thus giving a more detailed overview of the phenomena. Using this numerical case, a control method can be developed to redu

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4

Darabseh, Tariq, Doaa Al-Yafeai, and Abdel-Hamid Ismail Mourad. "Energy harvesting from car suspension system: Mathematical approach for half car model." Journal of Mechanical Engineering and Sciences 15, no. 1 (2021): 7695–714. http://dx.doi.org/10.15282/jmes.15.1.2021.07.0607.

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A significant contribution of this paper is developing a half car model with a built-in piezoelectric stack to evaluate the potential of harvesting power from the car suspension system. The regenerative car suspension system is modelled mathematically using Laplace transformation and simulated using MATLAB/Simulink. Two piezoelectric stacks are installed in series with the front and rear suspension springs to maintain the performance of the original suspension system in ride quality and comfortability. Half car model is subjected under harmonic excitation with acceleration of 0.5 g and velocit

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Naidu, Kolagani Narasimha. "Dynamic Analysis of Half-Car Suspension Systems Using MATLAB Simulink and ANSYS." INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 06 (2025): 1–9. https://doi.org/10.55041/ijsrem51010.

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This study presents the dynamic modelling, simulation and analysis of a half-car suspension system using both passive and active suspension configurations. A vertical half-car 4-DOF (degree of freedom) model is developed to analyse pitch and bounce motions. The project integrates MATLAB Simulink for time-domain analytical simulations and ANSYS finite element analysis (FEA) for numerical validation. The objective is to evaluate suspension behaviour under road disturbances at speeds ranging from 10 to 45 km/h. The analysis demonstrates that active suspensions significantly improve ride comfort a

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6

Liu, Xiang, Jing-Shan Zhao, and Zhi-Jing Feng. "Compliant dynamics of a rectilinear rear-independent system." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 5 (2016): 785–806. http://dx.doi.org/10.1177/0954406216631369.

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The rectilinear rear-independent suspension investigated in this paper could remain the wheel alignment parameters invariable in theory. However, its dynamics is much more complex than that of the existing suspensions because of its redundant constraints in structure. Considering the elasticity of the rectilinear rear-independent suspension, a rigid-flexible half-car dynamic model is established for the first time based on the discrete time transfer matrix method. At the same time, a rigid half-car dynamic model is established as a comparison. The natural frequency characteristics and dynamic

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7

Sarder, Mohammad Mohasin, Md Hossain Zahid, Habibullah Chowdhury, and Enaiyat Ghani Ovy. "Investigation of Vibration on Vehicle Suspension System using Half-car-model." Advanced Materials Research 199-200 (February 2011): 831–34. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.831.

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Vibration of the suspension system of a vehicle is crucial for comfort of the passenger. In this paper, a mathematical model of the suspension system is presented with half car model with four degrees of freedom. Vibration characteristics due to different pitch line excitation and different damping coefficients are investigated for heavy vehicle suspension system. The model is simulated in MATLAB SIMULINK for this investigation. ANSYS Structural software has also been used to determine the resonance frequency and mode shape of vehicle bounce and pitch motion.

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Matrood, Mustafa, and Ameen Nassar. "Improving the Dynamic Response of Half-Car Model Using Modified PID Controller." Iraqi Journal for Electrical and Electronic Engineering 19, no. 2 (2023): 52–58. http://dx.doi.org/10.37917/ijeee.19.2.7.

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This paper focuses on the vibration suppression of a half-car model by using a modified PID controller. Mostly, car vibrations could result from some road disturbances, such as bumps or potholes transmitted to a car body. The proposed controller consists of three main components as in the case of the conventional PID controller which is (Proportional, Integral, and Derivative) but the difference is in the positions of these components in the control loop system. Initially, a linear half-car suspension system is modeled in two forms passive and active, the activation process occurred using a co

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9

Zhang, Yu Lin. "Sliding Mode Control for Magneto-Rheological Vehicle Suspension Accounting for its Nonlinearity." Applied Mechanics and Materials 433-435 (October 2013): 1072–77. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1072.

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The non-linear characteristics of magneto-rheological (MR) suspension systems have limited control performance of modern control theory based on linear feedback control. In this paper, a four DOF half car suspension model with two nonlinear MR dampers is adopted. In order to account for the nonlinearity, a sliding mode controller, which has inherent robustness against system nonlinearity, is formulated to improve comfort and road holding of the car under industrial specifications and it is fit to semi-active suspensions. The numerical result shows that the semi-active suspension using the slid

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10

Ihsan, S. I., M. Ahmadian, Waleed F. Faris, and E. D. Blancard. "Ride Performance Analysis of Half-Car Model for Semi-Active System Using RMS as Performance Criteria." Shock and Vibration 16, no. 6 (2009): 593–605. http://dx.doi.org/10.1155/2009/607871.

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The work aims to study the root mean square (RMS) responses to acceleration input for four state variables: the msvertical acceleration, the mspitch angular acceleration and the front and rear deflections of the suspensions. A half-car two degree-of-freedom model of semi-active control scheme is analyzed and compared with the conventional passive suspension system. Frequency response of the transfer function for the heave, pitch of the sprung mass and suspension deflections are initially compared and then mean square analysis is utilized to see the effect of semi-active scheme. Results indicat

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Dukkipati, R. V., S. S. Vallurupalli, and M. O. M. Osman. "DISCRETE TIME ADAPTIVE ACTIVE SUSPENSION FOR A HALF-CAR MODEL." Transactions of the Canadian Society for Mechanical Engineering 21, no. 3 (1997): 221–72. http://dx.doi.org/10.1139/tcsme-1997-0012.

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This paper presents a discrete time adaptive active suspension for a multi-degree of freedom (MDOF) half-car model. The study involves formulation of a pitch plane half-car model involving four degrees of freedom and various nonlinear time varying (NTV) parameters. A multi-degree of freedom skyhook reference model has been described in this paper. Discrete auto regressive moving average (DARMA) models for the NTV-MDOF and the reference model have been developed. A modified version of the least squares estimation in which the controller parameters are updated as a matrix rather than as a vector

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12

Zhang, Lei, En Guo Dong, and Jie Xun Lou. "Conjoint Simulation of Active Suspension and ABS." Applied Mechanics and Materials 494-495 (February 2014): 155–58. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.155.

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A conjoint simulation of suspension system and brake system is proposed based on vehicle braking performance and ride stability. A half car simulation model is built applying the software of MATLAB in which the dynamic load is used to control the active force for suspension system and adjust parameter value of ABS (Anti-lock brake system). The suspension system and ABS construction of the half car simulation model is illustrated in detail. Using the simulation model, the braking distance, the stroke for suspension and the pitch angle of body are measured in three status which include the indiv

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13

Ghosh, M. K., and R. Dinavahi. "Vibration analysis of a vehicle system supported on a damper-controlled variable-spring-stiffness suspension." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 219, no. 5 (2005): 607–19. http://dx.doi.org/10.1243/095440705x11185.

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Vibration isolation performance has been investigated for a vehicle system supported on a damper-controlled variable-spring-stiffness suspension system. A half-car model has been analysed for different values of damping ratio, relative damping ratio, and mass ratio. The semi-active control of a half-car model has been investigated with the help of a force generator as well as with optimal control theory. The results show that a damper-controlled variable-stiffness suspension improves the vibration isolation performance of the suspension system. It has been found that a lower damping ratio, a r

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14

Khan, Muhammad Aseer, Muhammad Abid, Nisar Ahmed, Abdul Wadood, and Herie Park. "Nonlinear Control Design of a Half-Car Model Using Feedback Linearization and an LQR Controller." Applied Sciences 10, no. 9 (2020): 3075. http://dx.doi.org/10.3390/app10093075.

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Effective control of ride quality and handling performance are challenges for active vehicle suspension systems, particularly for off-road applications. The nonlinearities tend to degrade the performance of active suspension systems; these introduce harshness to the ride quality and reduce off-road mobility. Typical control strategies rely on linear models of the suspension dynamics. While these models are convenient, nominally accurate, and controllable due to the abundance of linear control techniques, they neglect the nonlinearities present in real suspension systems. The techniques already

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15

Shahein, Ahmed H., Atef A. Ata, Eman H. Haraz, and Bassuny M. El-Souhily. "Vibration suppression of terrains irregularities using active aerodynamic surface for half-car model sport vehicles." Journal of Vibration and Control 26, no. 23-24 (2020): 2148–62. http://dx.doi.org/10.1177/1077546320915316.

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Riding quality is considered a key element in automotive industry which imposes a challenge on car manufacturers to develop new alternative control strategies for the classical suspension system. To this extent, many efforts have been carried out on developing several active or semi-active suspension systems. In the past few years, the decreasing cost of electromechanical actuators has, however, opened new trends to face this challenge. Active aerodynamic surfaces (spoilers) represent an alternative and effective solution to the issue. Two contradicting criteria of good vehicle suspension perf

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16

DONG, X. M., MIAO YU, S. L. HUANG, ZUSHU LI, and W. M. CHEN. "HALF CAR MAGNETORHEOLOGICAL SUSPENSION SYSTEM ACCOUNTING FOR NONLINEARITY AND TIME DELAY." International Journal of Modern Physics B 19, no. 07n09 (2005): 1381–87. http://dx.doi.org/10.1142/s0217979205030335.

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MR suspension systems have significant non-linearity and time-delay characteristics. For this reason, linear feedback control of an MR suspension has limited vibration control performance. To address this problem, a four DOF half car suspension model with two MR dampers was adopted. Having analyzed non-linearity and time-delay of the MR suspension, a Human-Simulation Intelligent Control (HSIC) law with three levels was designed. Simulation verified effects of HSIC in solving the problem of non-linearity and time-delay of MR dampers. In comparison, simulation of linear-quadratic gaussian (LQG)

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17

Chen, H., Z. Y. Liu, and P. Y. Sun. "Application of Constrained H∞ Control to Active Suspension Systems on Half-Car Models." Journal of Dynamic Systems, Measurement, and Control 127, no. 3 (2004): 345–54. http://dx.doi.org/10.1115/1.1985442.

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This paper formulates the active suspension control problem as disturbance attenuation problem with output and control constraints. The H∞ performance is used to measure ride comfort such that more general road disturbances can be considered, while time-domain hard constraints are captured using the concept of reachable sets and state-space ellipsoids. Hence, conflicting requirements are specified separately and handled in a nature way. In the framework of Linear Matrix Inequality (LMI) optimization, constrained H∞ active suspensions are designed on half-car models with and without considering

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18

VU, Ngoc Tuan. "Investigation of factors affecting tire-road separation using a half-car model." Journal of Military Science and Technology 96 (June 25, 2024): 152–58. http://dx.doi.org/10.54939/1859-1043.j.mst.96.2024.152-158.

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This paper conducts numerical simulations to delve into the phenomenon of tire-road separation using a half-car model. It scrutinizes scenarios where the tires lose contact with the surface, delving into the time response and phase portrait domains. This analysis captures vertical displacements and pitch dynamics in both in-contact and no-contact states. The research examines tire-road detachment for individual wheels and both wheels concurrently while also considering variations in road conditions and suspension structures. By comparing outcomes between scenarios where tires maintain contact

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19

Lin, Jung-Shan, and Chiou-Jye Huang. "Nonlinear Backstepping Active Suspension Design Applied to a Half-Car Model." Vehicle System Dynamics 42, no. 6 (2004): 373–93. http://dx.doi.org/10.1080/0042311042000266784.

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20

Wang, Gang, Jiafan Deng, Tingting Zhou, and Suqi Liu. "Reinforcement Learning-Based Vibration Control for Half-Car Active Suspension Considering Unknown Dynamics and Preset Convergence Rate." Processes 12, no. 8 (2024): 1591. http://dx.doi.org/10.3390/pr12081591.

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Electromagnetic actuators, characterized by their lack of pneumatic or hydraulic circuits, rapid response, and ease of control, have the potential to significantly enhance the dynamic performance of automotive active suspensions. However, the complexity associated with their models and the calibration of control parameters hampers the efficiency of control design. To address this issue, this paper proposes a reinforcement learning vibration control strategy for electromagnetic active suspension. Firstly, a half-car dynamic model with electromagnetic active suspension is established. Considerin

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Matrood, Mustafa, and Ameen Nassar. "Mechanical Vibration Reduction of a Nonlinear Half-Car Model using Integral-Proportional Derivative (I-PD) Controller." Basrah journal for engineering science 24, no. 2 (2024): 34–42. http://dx.doi.org/10.33971/bjes.24.2.5.

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Vehicles usually consist of several essential systems. The performance of the vehicle is evaluated through the efficiency of these systems to perform their duties. The suspension system is one of these systems dedicated to absorbing shocks arising from vehicles passing over road bumps, thus reducing vibrations and achieving passenger comfort while driving. This paper presents a study on enhancing ride comfort in a nonlinear half-car model using a modified Proportional-Integral-Derivative (PID) controller. In this study a half-car model is developed considering the nonlinearities in the suspens

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Özcan, Dinçer, Ümit Sönmez, and Levent Güvenç. "Optimisation of the Nonlinear Suspension Characteristics of a Light Commercial Vehicle." International Journal of Vehicular Technology 2013 (February 18, 2013): 1–16. http://dx.doi.org/10.1155/2013/562424.

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The optimum functional characteristics of suspension components, namely, linear/nonlinear spring and nonlinear damper characteristic functions are determined using simple lumped parameter models. A quarter car model is used to represent the front independent suspension, and a half car model is used to represent the rear solid axle suspension of a light commercial vehicle. The functional shapes of the suspension characteristics used in the optimisation process are based on typical shapes supplied by a car manufacturer. The complexity of a nonlinear function optimisation problem is reduced by sc

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23

Shi, Kailai. "An Active Suspension System Design for a Racing Car." Journal of Physics: Conference Series 2216, no. 1 (2022): 012018. http://dx.doi.org/10.1088/1742-6596/2216/1/012018.

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Abstract This paper investigated the PID controller for an active suspension system for a racing car. A two-wheel half-car model is used and simulated in the Simulink environment. This model allows us to have two outputs and separately change the demand ride height of the front axle and the rear axle. Considering it is a racing car, downforce plays an important part in the suspension system and makes it a bit different from a private car that can only produce little downforce that can be ignored. To improve the control quality, a feedforward controller is added to compensate for the downforce.

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Pan, Gong Yu, Hai Yang, and Yong Tian Liu. "Study of Commercial Vehicle Active Seat Suspension." Applied Mechanics and Materials 441 (December 2013): 641–44. http://dx.doi.org/10.4028/www.scientific.net/amm.441.641.

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A 7-DOF half-car dynamic model which includes the cab mounting system and seat suspension system was established to study the performance of active seat suspension. The optimal control method was applied to design the active control system. Two dynamic simulation models of the passive seat suspension and the active seat suspension were set up by Matlab/Simulink, and the performance of the passive and active seat system was simulated in the time and frequency domain. The simulation results show that the active seat suspension can greatly improve the vehicle seat performance and the study has su

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Benmeddah, Abdeselem, Momir Drakulić, Aleksandar Đurić, Sreten Perić, Aleksandar Bukvić, and Abdellah Ferfouri. "Mathematical modeling and simulation of a half-vehicle suspension system in the roll plane." Vojnotehnicki glasnik 72, no. 1 (2024): 192–208. http://dx.doi.org/10.5937/vojtehg72-47551.

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Introduction/purpose: The study of vehicle suspension is a challenge for researchers in the field of vehicles regarding the impact of the suspension system on vehicle performances such as ride comfort, road holding, and working space. This paper presents the simulation of the Land Rover Defender 110 vehicle in the roll plane (half vehicle) in Simulink/MATLAB. The obtained results were compared with the results obtained in the ADAMS/CAR software package of the Land Rover Defender 110 simulation model previously experimentally validated. The Defender 110 vehicle has a dependent suspension system

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Lozia, Zbigniew, and Piotr Zdanowicz. "Simulation assessment of the half-power bandwidth method in testing shock absorbers." Open Engineering 11, no. 1 (2020): 120–29. http://dx.doi.org/10.1515/eng-2021-0011.

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AbstractThe work deals with usability of the half-power bandwidth method in the diagnostic testing of automotive shock absorbers. In all the simulation tests, the front and rear suspension system of a present-day medium-classmotor car was considered. At the first stage, calculations were made in the frequency domain for a linear “quarter-car” model with two degrees of freedom; then, simulations were carried out in the time domain with using a similar but strongly nonlinear model. In the latter case, actual characteristics (corresponding to those obtained from test rig measurements) of shock ab

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Walelign, Wudu Bezabh, and Mogninet Getaneh Ayitenew. "Simulation of Control System for a Half Car Model Suspension System for Passenger Car Application by Design an LQR Controller." Simulation of Control System for a Half Car Model Suspension System for Passenger Car Application by Design an LQR Controller 8, no. 10 (2023): 8. https://doi.org/10.5281/zenodo.10098930.

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The constantly growing topic of inventive vehicle system design is of interest to researchers. The difficulty stems from the ongoing requirement for advancement in vehicle handling, ride comfort, and driving dynamics. The present study proposed a mathematical model for a 4DOF half-car active suspension system (ASS) using a LQR (Linear Quadratic Regulator) controller, based on a control approach for ride comfort and vehicle handling. The task is simulated using MATLAB/Simulink software. The unsprung masses of the wheels' heave displacements, the vehicle's pitching dynamics, and the sprung masse

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Su, Xiaoyu, Bin Lin, and Shuai Liu. "Composite adaptive backstepping controller design and the energy calculation for active suspension system." Science Progress 104, no. 2 (2021): 003685042110105. http://dx.doi.org/10.1177/00368504211010572.

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The half-car suspension has the coupling of pitch angle and front and rear suspension. Especially when the suspension model has a series of uncertainties, the traditional linear control method is difficult to be applied to the half-car suspension model. At present, there is no systematic method to solve the suspension power. According to the energy storage characteristics of the elastic components of the suspension, the power calculation formula is proposed in this paper. This paper proposes a composite adaptive backstepping control scheme for the half-car active suspension systems. In this me

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Ho, Cong Minh, Cong Hung Nguyen, and Kyoung Kwan Ahn. "Adaptive Fuzzy Observer Control for Half-Car Active Suspension Systems with Prescribed Performance and Actuator Fault." Electronics 11, no. 11 (2022): 1733. http://dx.doi.org/10.3390/electronics11111733.

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In this paper, an adaptive fuzzy observer-based fault-tolerant controller is designed for a half-car active suspension system under the presence of uncertain parameters, unknown masses of passengers, and actuator failures. To improve the control performance, fuzzy logic systems (FLSs) are employed to approximate the unknown functions caused by uncertain dynamics of the suspension system. Then, an adaptive control design is developed to compensate for the effects of a non-ideal actuator. To improve passenger comfort, both vertical and angular motions are guaranteed simultaneously under the pred

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Thanh-Tung, Tran1 Chiaki Hori1 and Hiroshi Hasegawa. "INTEGRATED INERTER DESIGN AND APPLICATION TO OPTIMAL VEHICLE SUSPENSION SYSTEM." International Journal of Computer-Aided technologies (IJCAx) 01, oct (2014): 01–16. https://doi.org/10.5281/zenodo.1405943.

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The formula cars need high tire grip on racing challenge by reducing rolling displacement at corner or double change lands. In this case study, the paper clarifies some issues related to suspension system with inerter to reduce displacement and rolling angle under impact from road disturbance on Formula SAE Car. We propose some new designs, which have an advance for suspension system by improving dynamics. We optimize design of model based on the minimization of cost functions for roll dynamics, by reducing the displacement transfer and the energy consumed by the inerter. Base on a passive sus

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Thanh-Tung, Tran. "Integrated Inerter Design and Application to Optimal Vehicle Suspension System." International Journal of Computer-Aided technologies (IJCAx) 1, October (2021): 1–16. https://doi.org/10.5281/zenodo.4785950.

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The formula cars need high tire grip on racing challenge by reducing rolling displacement at corner or double change lands. In this case study, the paper clarifies some issues related to suspension system with inerter to reduce displacement and rolling angle under impact from road disturbance on Formula SAE Car. We propose some new designs, which have an advance for suspension system by improving dynamics. We optimize design of model based on the minimization of cost functions for roll dynamics, by reducing the displacement transfer and the energy consumed by the inerter. Base on a passive sus

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Thanh-Tung, Tran1 Chiaki Hori1 and Hiroshi Hasegawa2. "INTEGRATED INERTER DESIGN AND APPLICATION TO OPTIMAL VEHICLE SUSPENSION SYSTEM." International Journal of Computer- Aided Technologies (IJCAx) 1, no. 2/3 (2022): 1. https://doi.org/10.5281/zenodo.7386471.

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The formula cars need high tire grip on racing challenge by reducing rolling displacement at corner or double change lands. In this case study, the paper clarifies some issues related to suspension system with inerter to reduce displacement and rolling angle under impact from road disturbance on Formula SAE Car. We propose some new designs, which have an advance for suspension system by improving dynamics. We optimize design of model based on the minimization of cost functions for roll dynamics, by reducing the displacement transfer and the energy consumed by the inerter. Base on a passive sus

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Totu, Vlad, and Cătălin Alexandru. "Dynamic Optimization of a Single-Seater Car Suspension System." Applied Mechanics and Materials 658 (October 2014): 147–52. http://dx.doi.org/10.4028/www.scientific.net/amm.658.147.

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This work deals with the multi-objective dynamic optimization of the suspension system used for the front wheels of a single-seater vehicle. A half-car model is developed, considering the front suspension system mounted, while the rear suspension is replaced with a fictive spherical joint that is placed at the rear axle level. The purpose of the dynamic optimization is to minimize the chassis oscillations (yaw, pitch and roll), the monitored value for each design objective being the root mean square (RMS) during the dynamic simulation. The locations of some important attachments from the suspe

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Rodriguez-Guevara, Daniel, Antonio Favela-Contreras, Francisco Beltran-Carbajal, Carlos Sotelo, and David Sotelo. "An MPC-LQR-LPV Controller with Quadratic Stability Conditions for a Nonlinear Half-Car Active Suspension System with Electro-Hydraulic Actuators." Machines 10, no. 2 (2022): 137. http://dx.doi.org/10.3390/machines10020137.

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The active suspension system of a vehicle manipulated using electro-hydraulic actuators is a challenging nonlinear control problem. In this research work, a novel Linear Parameter Varying (LPV) State-Space (SS) model with a fictional input is proposed to represent a nonlinear half-car active suspension system. Four different scheduling parameters are used to embed the nonlinearities of both the suspension and the electro hydraulic actuators to represent its nonlinear behavior. A recursive least squares (RLS) algorithm is used to predict the future behavior of the scheduling parameters along th

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Gudarzi, Mohammad. "RELIABLE ROBUST CONTROLLER FOR HALF-CAR ACTIVE SUSPENSION SYSTEMS BASED ON HUMAN-BODY DYNAMICS." Facta Universitatis, Series: Mechanical Engineering 14, no. 2 (2016): 121. http://dx.doi.org/10.22190/fume1602121g.

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The paper investigates a non-fragile robust control strategy for a half-car active suspension system considering human-body dynamics. A 4-DoF uncertain vibration model of the driver’s body is combined with the car’s model in order to make the controller design procedure more accurate. The desired controller is obtained by solving a linear matrix inequality formulation. Then the performance of the active suspension system with the designed controller is compared to the passive one in both frequency and time domain simulations. Finally, the effect of the controller gain variations on the closed-

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Krauze, Piotr, and Jerzy Kasprzyk. "Mixed Skyhook and FxLMS Control of a Half-Car Model with Magnetorheological Dampers." Advances in Acoustics and Vibration 2016 (October 25, 2016): 1–13. http://dx.doi.org/10.1155/2016/7428616.

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The problem of vibration attenuation in a semiactive vehicle suspension is considered. The proposed solution is based on usage of the information about the road roughness coming from the sensor installed on the front axle of the vehicle. It does not need any preview sensor to measure the road roughness as other preview control strategies do. Here, the well-known Skyhook algorithm is used for control of the front magnetorheological (MR) damper. This algorithm is tuned to a quarter-car model of the front part of the vehicle. The rear MR damper is controlled by the FxLMS (Filtered-x LMS) taking a

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Karim Afshar, Keyvan, and Ali Javadi. "Constrained H∞ control for a half-car model of an active suspension system with actuator time delay by predictor feedback." Journal of Vibration and Control 25, no. 10 (2019): 1673–92. http://dx.doi.org/10.1177/1077546319828457.

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In this paper, constrained memory state-feedback H∝ control for a half-car model of an active vehicle suspension system with input time-delay in the presence of external disturbance has been investigated. Its prime goal is to improve the inherent trade-offs among power consumption, handling performance, ride quality, and suspension travel. The tire deflections and the suspension deflections are constrained by their peak response values in time domain using the generalized H2 ( GH∝) norm (energy-to-peak) performance, while the ride comfort performance of the suspension system is optimized by no

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Pedro, Jimoh O., Sakhile M. S. Nhlapo, and Lindokuhle J. Mpanza. "Model Predictive Control of Half-Car Active Suspension Systems Using Particle Swarm Optimisation." IFAC-PapersOnLine 53, no. 2 (2020): 14438–43. http://dx.doi.org/10.1016/j.ifacol.2020.12.1443.

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MUSTAFA, Ghazally I. Y., Haoping WANG, and Yang TIAN. "Model-free Adaptive Fuzzy Logic Control for a Half-car Active Suspension System." Studies in Informatics and Control 28, no. 1 (2019): 13–24. http://dx.doi.org/10.24846/v28i1y201902.

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Krtolica, R., and D. Hrovat. "Optimal active suspension control based on a half-car model: an analytical solution." IEEE Transactions on Automatic Control 37, no. 4 (1992): 528–32. http://dx.doi.org/10.1109/9.126592.

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Alexandru, Cătălin. "Multi-Criteria Dynamic Optimization of a Front Wheels Suspension System." Applied Mechanics and Materials 656 (October 2014): 129–36. http://dx.doi.org/10.4028/www.scientific.net/amm.656.129.

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This work deals with the dynamic optimization of the suspension system used for the front wheels of a race car. A multi-criteria optimization is approached, intending to minimize the main oscillations of the chassis (pitch, roll and yaw). The locations (in terms of global coordinates) of some joints in the suspension system are considered as design variables for the dynamic optimization. The dynamic model of the suspension system of the front wheels, corresponding to a half-car model, is developed in MBS (Multi-Body Systems) concept, while the relationships between the design objectives and va

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Lei, Jing, Shun-Fang Hu, Zuo Jiang, and Guo-Xing Shi. "Optimal Vibration Control for Half-Car Suspension on In-Vehicle Networks in Delta Domain." Abstract and Applied Analysis 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/912747.

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The paper explores the optimal vibration control design problem for a half-car suspension working on in-vehicle networks in delta domain. First, the original suspension system with ECU-actuator delay and sensor-ECU delay is modeled. By using delta operators, the original system is transformed into an associated sampled-data system with time delays in delta domain. After model transformation, the sampled-data system equation is reduced to one without actuator delays and convenient to calculate the states with nonintegral time delay. Therefore, the sampled-data optimal vibration control law can

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Abd - Elwahab, M. Rabie, Ahmad O. Moaaz, Waleed Fekry Faris, Nouby M. Ghazaly, and Mostafa M. Makrahy. "Evaluation the New Hydro-Pneumatic Damper for Passenger Car using LQR, PID and H-infinity Control Strategies." Automotive Experiences 7, no. 2 (2024): 207–23. https://doi.org/10.31603/ae.10796.

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In this study, a mathematical model of a new hydro-pneumatic damper consists of a double-acting cylinder, two oil chambers, a damping valve, and an accumulator is developed to assess its response to vertical vibrations in a passenger car. The main idea of the new damper aim to make that the damping coefficient in compression differ than that in rebound which achieve more stability specially during cornering. The damping coefficient difference in compression and rebound can be achieved due to the presence of accumulator. Both passive and active hydro-pneumatic suspension systems with the new da

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Wang, Gang, Jiafan Deng, Tingting Zhou, and Suqi Liu. "H∞ Differential Game of Nonlinear Half-Car Active Suspension via Off-Policy Reinforcement Learning." Mathematics 12, no. 17 (2024): 2665. http://dx.doi.org/10.3390/math12172665.

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This paper investigates a parameter-free H∞ differential game approach for nonlinear active vehicle suspensions. The study accounts for the geometric nonlinearity of the half-car active suspension and the cubic nonlinearity of the damping elements. The nonlinear H∞ control problem is reformulated as a zero-sum game between two players, leading to the establishment of the Hamilton–Jacobi–Isaacs (HJI) equation with a Nash equilibrium solution. To minimize reliance on model parameters during the solution process, an actor–critic framework employing neural networks is utilized to approximate the c

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Jurkiewicz, Andrzej, Janusz Kowal, and Kamil Zając. "Sky-Hook Control and Kalman Filtering in Nonlinear Model of Tracked Vehicle Suspension System." Acta Mechanica et Automatica 11, no. 3 (2017): 222–28. http://dx.doi.org/10.1515/ama-2017-0034.

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AbstractThe essence of the undertaken topic is application of the continuous sky-hook control strategy and the Extended Kalman Filter as the state observer in the 2S1 tracked vehicle suspension system. The half-car model of this suspension system consists of seven logarithmic spiral springs and two magnetorheological dampers which has been described by the Bingham model. The applied continuous sky-hook control strategy considers nonlinear stiffness characteristic of the logarithmic spiral springs. The control is determined on estimates generated by the Extended Kalman Filter. Improve of ride c

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Havelka, Ferdinand, and Miloš Musil. "Multi-Objective Optimization of Vehicle Suspension Parameters Considering Various Road Classes." Scientific Proceedings Faculty of Mechanical Engineering 22, no. 1 (2014): 26–31. http://dx.doi.org/10.2478/stu-2014-0005.

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Abstract Vehicle suspension optimization for various road classes travelled at different velocities is performed. Road excitation is modeled using a first order shaping filter. A half-car model is adopted to simulate the vehicle’s vertical dynamics. The excitation time delay between the rear and the front tire is modeled using Pade approximation. Suspension parameters are optimized using a random search method with respect to “comfort” and “sporty driving” considering the design constraints of the suspension and road holding and maximum suspension travel constraints. Optimal suspension paramet

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Paarya, A. R., and H. Zarabadipour. "Digital Controller Design for Half-Car Active Suspension System with Using Singular Perturbation Theory." Advanced Materials Research 403-408 (November 2011): 4800–4805. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4800.

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In this paper the digital controller design for vehicle suspension system, based on a half-car model using singular perturbed systems is considered. This strategy is based on the slow and fast subsystems controller design. The simulation results show them favorable performance of the controller and achieve fast and good response.

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Lü, Bao Zhan, Ai Jun Hu, and Si Hong Zhu. "Experimental Research on the Effect of Sinusoidal Excitation on Dynamic Wheel Load of Hydro-Pneumatic Suspension Vehicle." Applied Mechanics and Materials 143-144 (December 2011): 396–401. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.396.

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Based on the mathematical model of quarter car body model being put forward, the indoor platform experiment of quarter car body with hydro-pneumatic suspension system was done. During test, the parameters of dynamic wheel load along with the change of vibration amplitude and frequency were investigated. The results show that: the cycle of acceleration of sprung mass has half cycle lag than unsprung mass, and the main parameters of dynamic wheel load has increased significantly along with the increase of vibration amplitude and frequency. At the same time, through analysis the acceleration time

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Jonjo, Robert Emmanuel, and Sahr Tamba Nyalloma. "Modeling the Effect of Road Excitation on Vehicle Suspension System." International Journal of Engineering Materials and Manufacture 5, no. 1 (2020): 19–28. http://dx.doi.org/10.26776/ijemm.05.01.2020.04.

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The vehicle suspension system serve a dual purpose – to provide passenger comfort and good road holding. In the design of a vehicle suspension system, these two contradictory criteria must be balanced out. Road irregularities are also a major source of anxiety amongst drivers and passengers alike. This research was undertaken to investigate the effect road irregularities will have on the vehicle structure especially the suspension system. In this study, the responses of different linear vehicle models are studied for step road input. The mathematical models considered are: a two degrees-of-fre

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Yoshimura, T., K. Sagimori, and J. Hino. "Active suspension of a half car model based on linear control with dynamic absorbers." International Journal of Vehicle Design 25, no. 4 (2001): 283. http://dx.doi.org/10.1504/ijvd.2001.005203.

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