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Статті в журналах з теми "Nonlinear suspension"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Hua, CR, Y. Zhao, ZW Lu, and H. Ouyang. "Random vibration of vehicle with hysteretic nonlinear suspension under road roughness excitation." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401775122. http://dx.doi.org/10.1177/1687814017751222.

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Анотація:

The analysis of random vibration of a vehicle with hysteretic nonlinear suspension under road roughness excitation is a fundamental part of evaluation of a vehicle’s dynamic features and design of its active suspension system. The effective analysis method of random vibration of a vehicle with hysteretic suspension springs is presented based on the pseudoexcitation method and the equivalent linearisation technique. A stable and efficient iteration scheme is constructed to obtain the equivalent linearised system of the original nonlinear vehicle system. The power spectral density of the vehicle

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2

Klockiewicz, Z., and G. Ślaski. "The estimation of frequency response of nonlinear quarter car model and bilinear model of damper characteristics." IOP Conference Series: Materials Science and Engineering 1247, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1757-899x/1247/1/012007.

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Анотація:

Abstract The paper presents proposed and tested methods of estimation of frequency response of nonlinear quarter car suspension model and comparison with method for linear model used for research of vehicle vertical dynamics. Linear quarter car suspension model is widely used for estimation of comfort and safety performance of passive and semiactive suspensions. The real suspension - especially shock absorbers - are non-linear in three aspects: static characteristics, hysteresis and the presence of friction. Testing linear suspension model is possible with the use of analytical transfer functi

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3

Shannan, J. E., and M. J. Vanderploeg. "A Vehicle Handling Model With Active Suspensions." Journal of Mechanisms, Transmissions, and Automation in Design 111, no. 3 (1989): 375–81. http://dx.doi.org/10.1115/1.3259009.

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Анотація:

This paper presents two vehicle models used to investigate the effects of active suspensions. One is a linear seven degree of freedom ride model. The second is a nonlinear ten degree of freedom ride and handling model. Full state feedback optimal control algorithms are developed for both models. The seven degree of freedom model is used to study ride effects. The active suspension substantially reduced the motion of the sprung mass. The ten degree of freedom model is used to study the effects of the active suspension on the directional response characteristics of the vehicle. The handling char

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4

Wan, Yi, and Joseph M. Schimmels. "Improved Vibration Isolating Seat Suspension Designs Based on Position-Dependent Nonlinear Stiffness and Damping Characteristics." Journal of Dynamic Systems, Measurement, and Control 125, no. 3 (2003): 330–38. http://dx.doi.org/10.1115/1.1592189.

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Анотація:

The design of seat suspensions having linear stiffness and damping characteristics involves a tradeoff between three performance measures. These measures are: (1) suspension range of motion, (2) improved average vibration isolation (weighted average across a wide exposure spectrum), and (3) improved isolation at the frequency of peak transmissibility. To overcome the limitations associated with this tradeoff, nonlinear mechanical properties are used here in the design of a seat suspension. From the infinite number of possible nonlinear mechanical characteristics, several possibilities that sho

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5

Hanafi, Dirman, Mohamad Fauzi Zakaria, Rosli Omar, M. Nor M. Than, M. Fua'ad Rahmat, and Rozaimi Ghazali. "Neuro Model Approach for a Quarter Car Passive Suspension Systems." Applied Mechanics and Materials 775 (July 2015): 103–9. http://dx.doi.org/10.4028/www.scientific.net/amm.775.103.

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Анотація:

The road handling, load carrying and passenger comfort are three intension factors on car suspension’s system. They should be compromised to achieve the good the car suspension dynamics. To fulfill the requirement, the car suspension system must be controlled and analyzed. To design and analyze the suspension controller, the realistic dynamics model of car suspension is needed. In this paper, the car suspension is assumed as a quarter car and has a model structure as a neural network structure. The model is assumed consist of nonlinear properties that are contributed by spring stiffness and da

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6

Marakakis, Konstantinos, Manolis Paterakis, Georgios K. Tairidis, and Georgios E. Stavroulakis. "Active Fuzzy Control of Linear and Nonlinear Suspensions in Vehicles." Journal of Integrated Engineering and Applied Sciences 2, no. 2 (2024): 92–108. https://doi.org/10.5281/zenodo.14188048.

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Анотація:

Suspensions are vital for a vehicle, since they provide safety and comfort. There are many types of suspensions in the industry. The most advanced of them are the active or electronic suspensions, where the degree of damping is modified in order to achieve the desired rolling of the vehicle. This is achieved by changing the pressure or the flow of air or oil inside the damper, or its properties. A control system is necessary for this task. Powerful and robust soft control tools, such as fuzzy inference systems can provide the desired results. In the present paper, the active suspension is cont

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7

Buckner, Gregory D., Karl T. Schuetze, and Joe H. Beno. "Intelligent Feedback Linearization for Active Vehicle Suspension Control." Journal of Dynamic Systems, Measurement, and Control 123, no. 4 (2000): 727–33. http://dx.doi.org/10.1115/1.1408945.

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Анотація:

Effective control of ride quality and handling performance are challenges for active vehicle suspension systems, particularly for off-road applications. Off-road vehicles experience large suspension displacements, where the nonlinear kinematics and damping characteristics of suspension elements are significant. These nonlinearities tend to degrade the performance of active suspension systems, introducing harshness to the ride quality and reducing off-road mobility. Typical control strategies rely on linear, time-invariant models of the suspension dynamics. While these models are convenient, no

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8

Metwalli, S. M. "Optimum Nonlinear Suspension Systems." Journal of Mechanisms, Transmissions, and Automation in Design 108, no. 2 (1986): 197–202. http://dx.doi.org/10.1115/1.3260802.

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Анотація:

Global optimal isolation is presented in this paper. Results indicate that to optimally isolate a system, it should be totally disconnected from the disturbance. A model is then selected to optimize nonlinear suspension systems which, in the limits, approach optimal isolation characteristics. Nondimensional design parameters that themselves are made to be dependent on the input are employed. A step disturbance is selected to equivalently represent real excitations. The objective function incorporates the tire-terrain normal force as an indicator of the vehicle controllability which is unconstr

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9

Zhu, Zhi Wen, Chang Wei Sui, and Jia Xu. "Nonlinear Dynamic Characteristics of Semi-Active Suspension System with SMA Spring Based on Hysteretic Nonlinear Theory." Key Engineering Materials 458 (December 2010): 265–70. http://dx.doi.org/10.4028/www.scientific.net/kem.458.265.

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Анотація:

In this paper, the nonlinear dynamic characteristics of vehicle semi-active suspension system with SMA spring were studied in hysteretic nonlinear theory. SMA spring was applied in semi-active suspension system to control vibration. Von del Pol hysteretic cycle model were introduced to set up a new kind of continuous SMA strain-stress model, based on which the nonlinear dynamic model of vehicle semi-active suspension system with SMA spring was developed. The first-order nonlinear approximate solution of suspension system was obtained, the stability and bifurcation characteristic of suspension

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10

Yin, Weitan, Juyue Ding, and Yi Qiu. "Nonlinear Dynamic Modelling of a Suspension Seat for Predicting the Vertical Seat Transmissibility." Mathematical Problems in Engineering 2021 (December 6, 2021): 1–10. http://dx.doi.org/10.1155/2021/3026108.

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Анотація:

Suspension seats are widely used in heavy vehicles to reduce vibration transmitted to human body and promote ride comfort. Previous studies have shown that the dynamics of the suspension seat exhibits nonlinear behaviour with changed vibration magnitudes. Despite various linear seat models developed in the past, a nonlinear model of the suspension seat capturing the nonlinear dynamic behaviour of the seat suspension and cushion has not been developed for the prediction of the seat transmissibility. This paper proposes a nonlinear lumped parameter model of the suspension seat to predict the non

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11

Guo, D. L., H. Y. Hu, and J. Q. Yi. "Neural Network Control for a Semi-Active Vehicle Suspension with a Magnetorheological Damper." Journal of Vibration and Control 10, no. 3 (2004): 461–71. http://dx.doi.org/10.1177/1077546304038968.

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Анотація:

Semi-active vehicle suspension with magnetorheological dampers is a promising technology for improving the ride comfort of a ground vehicle. However, the magnetorheological damper always exhibits nonlinear hysteresis between its output force and relative velocity, and additional nonlinear stiffness owing to the state transition from liquid to semi-solid or solid, so that the semi-active suspension with magnetorheological dampers features nonlinearity by nature. To control such nonlinear dynamic systems subject to random road roughness, in this paper we present a neural network control, which i

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12

Ji, Peng, Hui Jun Jia, and Shuang Sheng Feng. "Influence of Suspension Nonlinear Hysteretic Characteristic on Handling Performance." Applied Mechanics and Materials 241-244 (December 2012): 1978–81. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1978.

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Анотація:

Suspension stiffness is influenced by the nonlinear hysteretic characteristic, which has effect on vehicle handling performance. In this paper, the effect of suspension nonlinear hysteretic characteristic is analyzed and described and the effect of characteristic on suspension stiffness and handling performance is indicated by simulating results. Due to suspension stiffness is smaller than nominal stiffness with suspension travel which described by nonlinear hysteretic characteristic model, handling performance is obtained accurately.

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13

Pazooki, Alireza, Avesta Goodarzi, Amir Khajepour, Amir Soltani, and Claude Porlier. "A novel approach for the design and analysis of nonlinear dampers for automotive suspensions." Journal of Vibration and Control 24, no. 14 (2017): 3132–47. http://dx.doi.org/10.1177/1077546317701011.

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Анотація:

This paper proposes an analytical technique for frequency analysis and the design of nonlinear dampers to further improve ride dynamics performance of vehicle suspensions over a wide range of excitation frequencies. Using the energy balance method (EBM), the proposed methodology estimates the equivalent linear damping coefficient of any nonlinear passive damper whose force is a general function of the damper’s relative displacement and relative velocity. Knowing the equivalent linear damping coefficient makes it possible to perform a frequency analysis of the suspension ride performance with a

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14

Liu, Gang, Si Zhong Chen, and Hong Bin Ren. "Matching Analysis on Main Parameter for the Shock Absorber Development Process." Advanced Materials Research 694-697 (May 2013): 393–98. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.393.

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Анотація:

Considering nonlinear characteristics of springiness and damping element, the quarter-car suspension nonlinear dynamic model is established with ADAMS. The simulation model of suspension established, and the simulation curve of nonlinear suspension is gotten by using the numerical simulation methods. The target parameters of the piecewise linear three stage control mode of the shock absorber are studied under the different random road excitation, it would provide the theoretical basic for the nonlinear damping matching of the vehicle suspension system.

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15

Zhang, Jinhua, Yi Yang, and Cheng Hu. "An Adaptive Controller Design for Nonlinear Active Air Suspension Systems with Uncertainties." Mathematics 11, no. 12 (2023): 2626. http://dx.doi.org/10.3390/math11122626.

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Анотація:

Active air spring suspensions can improve the vehicle ride comfort and meanwhile realize the vehicle height regulation, and therefore, they have been widely used and studied. However, to achieve better ride comfort and a satisfactory vehicle body height adjustment, the active air suspension controller becomes an indispensable and significant part of the system. Since the nonlinear suspension system possesses uncertainties, it is difficult to take into account both ride comfort and height regulation. This study innovatively proposes an adaptive control algorithm to specifically address the prob

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16

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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Анотація:

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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17

Li, Yinong, Ling Zheng, Yixiao Liang, and Yinghong Yu. "Adaptive compensation control of an electromagnetic active suspension system based on nonlinear characteristics of the linear motor." Journal of Vibration and Control 26, no. 21-22 (2020): 1873–85. http://dx.doi.org/10.1177/1077546320909985.

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Анотація:

With the electrification and intellectualization of vehicle systems, electromagnetic active suspension has been paid more and more attention. Linear motor is one of the effective actuators of the electromagnetic active suspension system. The nonlinear factors of linear motor, such as nonlinear friction force and ripple force, as well as power limit and magnetic saturation, will reduce the performance of electromagnetic active suspension. However, the current research rarely considers the effect of these nonlinear factors on active suspension control. In this article, the effect of nonlineariti

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18

Song, Xubin, Mehdi Ahmadian, and Steve Southward. "Analysis and Strategy for Superharmonics With Semiactive Suspension Control Systems." Journal of Dynamic Systems, Measurement, and Control 129, no. 6 (2007): 795–803. http://dx.doi.org/10.1115/1.2789470.

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Анотація:

This paper focuses on an experimental implementation of a semiactive seat suspension using magnetorheological (MR) dampers. We first introduce the nonlinear dynamics phenomena induced by skyhook control. Skyhook control has been widely applied to applications ranging from structural vibration suppression to commercialized vehicle suspensions. Unfortunately, skyhook control generates superharmonic dynamics; yet, this issue has not been clearly addressed in such vibration control systems. This paper will attempt to explain how superharmonics are created with skyhook controls through analysis of

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19

Wen, Tao, Xu Zhou, Xiaolong Li, and Zhiqiang Long. "Data-Driven Nonlinear Iterative Inversion Suspension Control." Actuators 12, no. 2 (2023): 68. http://dx.doi.org/10.3390/act12020068.

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Анотація:

The commercial operation of the maglev train has strict requirements for the reliability and safety of the suspension control system. However, due to a large number of unmodeled dynamics of the suspension system, it is difficult to obtain the precise mathematical model of the suspension system. After the suspension system has been operated for a long time with high load, the system model will change due to the wear, aging and failure of components, as well as the settlement of the line and track. The control performance is degraded. Therefore, this paper proposes a data-driven nonlinear iterat

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20

Yang, Fuxing, Leilei Zhao, Yuewei Yu, and Changcheng Zhou. "Matching, Stability, and Vibration Analysis of Nonlinear Suspension System for Truck Cabs." Shock and Vibration 2019 (October 7, 2019): 1–10. http://dx.doi.org/10.1155/2019/1490980.

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Анотація:

To improve comfort, a nonlinear suspension system is proposed on the basis of the nonlinear vibration isolation theory and the installation space of the cab suspension system for trucks. This system is suitable for all-floating cabs. For easy matching and design, the static and stability characteristics of the suspension system were analyzed, respectively, and the boundary condition for the stability of the system was given. Moreover, the cab simulation model was established, and the dynamic simulation was conducted. The stability analysis shows that the smaller the vibration excitation of the

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21

Fei, Jun Tao, and Jing Xu. "Dynamical Modeling and Neural Network Adaptive Control of Vehicle Suspension." Applied Mechanics and Materials 148-149 (December 2011): 516–19. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.516.

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Анотація:

This paper attempts to establish the vibration control technology based on neural network control. First, the dynamic model of vehicle suspension system is discussed, and the linear passive suspension model and nonlinear spring suspension model of the vertical acceleration are compared. It is shown that the performance of nonlinear spring suspension is better than that of the linear passive suspension model. Because of the great advantages of the neural network in dealing with the nonlinear property, secondly, model reference neural control module is introduced in the suspension system to real

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22

Moran, Antonio, Tomohiro Hasegawa, and Masao Nagai. "Integration of Bilinear Systems and Neural Networks for Designing Nonlinear Semi-Active Suspensions." Journal of Robotics and Mechatronics 7, no. 4 (1995): 295–300. http://dx.doi.org/10.20965/jrm.1995.p0295.

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Анотація:

This paper presents a new design method of semi-active suspensions based on the integration of neural networks and bilinear systems. It is known that semi-active suspensions with ideal linear components have a bilinear structure. However actual semi-active suspensions with nonlinear components have an structure which is not purely bilinear. In order to improve the performance of semi-active suspensions, neural networks and bilinear systems are integrated and used for the identification and optimal control of nonlinear semi-active suspensions. The validity and applicability of the proposed meth

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23

Rui, Bai. "Nonlinear adaptive sliding-mode control of the electronically controlled air suspension system." International Journal of Advanced Robotic Systems 16, no. 5 (2019): 172988141988152. http://dx.doi.org/10.1177/1729881419881527.

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Анотація:

Recent years, electronically controlled air suspension has been widely used in vehicles to improve the riding comfort and the road holding ability. This article presents a new nonlinear adaptive sliding-mode control method for electronically controlled air suspension. A nonlinear dynamical model of electronically controlled air suspension is established, where the nonlinear dynamical characteristic of the air spring is considered. Based on the proposed nonlinear dynamic model, an adaptive sliding-mode control method is presented to stabilize the displacement of electronically controlled air su

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24

Malík, Josef. "Nonlinear models of suspension bridges." Journal of Mathematical Analysis and Applications 321, no. 2 (2006): 828–50. http://dx.doi.org/10.1016/j.jmaa.2005.08.080.

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25

Wang, Xiao Guang, Bin Mei, Feng Sha, and Xin Zhou. "Influence of Suspension Mass Variation on Dynamic Characteristic of Magnetic Suspension System." Applied Mechanics and Materials 150 (January 2012): 63–68. http://dx.doi.org/10.4028/www.scientific.net/amm.150.63.

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Анотація:

Magnetic suspension system is nonlinear and unstable essentially. It is according to the principle of nonlinear system having same topological structure near the operation point with the linear system that linear control arithmetic for a nonlinear system is adopted. The system is easy to lose stabilize and diverge when subjected to interference or system parameters variation. Suspension mass is a key parameter of a magnetic suspension system and suspension mass variation has great influence on the dynamic characteristic of a magnetic suspension system. The influence of suspension mass variatio

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26

Dahunsi, Olurotimi Akintunde, and Jimoh Olarewaju Pedro. "Nonlinear Active Vehicle Suspension Controller Design using PID Reference Tracking." Journal of the Institute of Industrial Applications Engineers 3, no. 3 (2015): 111–20. http://dx.doi.org/10.12792/jiiae.3.111.

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27

Zhu, Yue, and Sihong Zhu. "Nonlinear Time-Delay Suspension Adaptive Neural Network Active Control." Abstract and Applied Analysis 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/765871.

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Анотація:

Considering the time-delay in control input channel and the nonlinear spring stiffness characteristics of suspension, a quarter-vehicle magneto rheological active suspension nonlinear model with time-delay is established in this paper. Based on the time-delay nonlinear model, an adaptive neural network structure for magneto rheological active suspension is presented. By recognizing and training the adaptive neural network, the adaptive neural network active suspension controller is obtained. Simulation results show that the presented method can guarantee that the quarter-vehicle magneto rheolo

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28

ZHANG, JIANCHAO, Zhan Chen, Jun Wang, and Yufei Hu. "DYNAMIC CHARACTERISTICS OF NON-SMOOTH SUSPENSION SYSTEM UNDER FRACTIONAL-ORDER DISPLACEMENT FEEDBACK." DYNA 96, no. 3 (2021): 322–28. http://dx.doi.org/10.6036/10125.

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Анотація:

Vehicle suspension systems generally have non-smooth factors, such as clearances, collision, and constraint. The bad dynamic behaviors caused by these non-smooth factors have not been controlled effectively, thus influencing the driving performance and riding comfort of vehicles. To explore the dynamic characteristics of non-smooth suspension systems for controlling the bad dynamic behaviors, an approximate analytical solution to the response of a two-degree of freedom nonlinear suspension system, which has a fractional-order displacement feedback under harmonic excitation, was deduced by the

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29

Xing, Bang Sheng, Ning Ning Wang, and Le Xu. "Study on Nonlinear Damping Properties of Hydro-Pneumatic Suspension System for XP302-Pneumatic Tyred Roller." Advanced Materials Research 945-949 (June 2014): 987–91. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.987.

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Анотація:

The nonlinear stiffness and damping properties of the hydro-pneumatic suspension system are introduced, and the nonlinear mathematical model of it is established. Using MATLAB 2009b to establish the computer simulation program and draw out the nonlinear stiffness curve and damping properties curve of the hydro-pneumatic suspension system. Then, researching the influences of related parameters' changes on the nonlinear stiffness and damping properties of the hydro-pneumatic suspension system. The simulation of vehicle dynamic performance research's foundation is provided.

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30

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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Анотація:

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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31

PARTHASARATHY, M., K. H. AHN, B. M. BELONGIA, and D. J. KLINGENBERG. "THE ROLE OF SUSPENSION STRUCTURE IN THE DYNAMIC RESPONSE OF ELECTRORHEOLOGICAL SUSPENSIONS." International Journal of Modern Physics B 08, no. 20n21 (1994): 2789–809. http://dx.doi.org/10.1142/s0217979294001135.

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Анотація:

The dynamic response of electrorheological (ER) suspensions has received little attention relative to the effort devoted to the study of the steady shear response. We report on simulation and experimental investigations of the dynamic oscillatory response of ER suspensions, in particular focusing on the relationship between suspension structure and the rheological response. We consider the response of monodisperse and polydisperse suspensions under linear deformation, as well as the response in the nonlinear regime. Dimensional analysis of the equations of motion predict that the linear rheolo

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32

Zhu, Yancong, Weisheng Jiang, and Ruiya Qi. "Research on Finite Element Structure of Vehicle Suspension Control Arm Based on Neural Network Sensing Control." Journal of Sensors 2022 (May 14, 2022): 1–7. http://dx.doi.org/10.1155/2022/2897065.

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Анотація:

To improve the adaptive control of the neural network under the influence of vehicle suspension control, the neural network control method is proposed. The specific content of the method analyzes the nonlinear properties of vehicle suspensions, proposes neural network-based adaptive control strategies, and develops neural network-based nonlinear algorithms and neural identifiers. Genetic algorithms perform predictive control of rear suspension through a compensation network. The experimental results show that the model structure is order n = m = 2 , the AN1 network node is 4-6-1, the AN2 netwo

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33

Ji, Jie, Yun Wu Li, and Jin Dou Zhao. "Reverse Analysis for Determining the Stiffness Characteristics of Suspension Spring with Variable Pitch and Wire Diameter." Advanced Materials Research 421 (December 2011): 783–87. http://dx.doi.org/10.4028/www.scientific.net/amr.421.783.

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Анотація:

A reverse analysis method for determining the stiffness characteristics of nonlinear suspension spring with variable pitch and wire diameter is developed by introducing the ideas of dispersion. Meanwhile, the reverse analysis of a nonlinear suspension spring used in truck is completed as an example, and the progressive force-displacement curves obtained by theoretical and experimental analysis are compared in order to verify the validity of the reverse analysis method used for nonlinear suspension spring.

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34

Wang, Dazhuang, Dingxuan Zhao, Mingde Gong, and Bin Yang. "Nonlinear Predictive Sliding Mode Control for Active Suspension System." Shock and Vibration 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/8194305.

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Анотація:

An active suspension system is important in meeting the requirements of the ride comfort and handling stability for vehicles. In this work, a nonlinear model of active suspension system and a corresponding nonlinear robust predictive sliding mode control are established for the control problem of active suspension. Firstly, a seven-degree-of-freedom active suspension model is established considering the nonlinear effects of springs and dampers; and secondly, the dynamic model is expanded in the time domain, and the corresponding predictive sliding mode control is established. The uncertainties

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35

Cheng, Zhongli, Zonghua Li, and Fanqing Kong. "Statistical Linearization of Nonlinear Stiffness in Hydropneumatic Suspension." MATEC Web of Conferences 153 (2018): 04006. http://dx.doi.org/10.1051/matecconf/201815304006.

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Анотація:

Hydropneumatic springs are the elastic components of a vehicle’s suspension. As the nonlinear characteristic of the spring is difficult to express accurately, the statistical linearization method is introduced to analyze the dynamic response of the hydropneumatic spring. The nonlinear stiffness of a hydropneumatic spring is approximated by a quadratic polynomial at the static equilibrium position. Parameters of the hydropneumatic spring, road roughness and vehicle velocity are provided and analytical functions for equivalent stiffness and the dynamic equilibrium position are worked out in this

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36

TAO, R. "THE PHYSICAL MECHANISM TO REDUCE VISCOSITY OF LIQUID SUSPENSIONS." International Journal of Modern Physics B 21, no. 28n29 (2007): 4767–73. http://dx.doi.org/10.1142/s0217979207045645.

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Reducing the viscosity of liquid suspensions is vital in science and engineering. This paper explores the physical mechanism for the viscosity reduction method in liquid suspension by pulsed electric or magnetic field. The key is that the maximum volume fraction to be available for the suspended particles in the suspension increases with the particle size and the polydispersity in the particle size distribution. Positive experimental results with various liquid suspensions indicate that this method, developed from the basic mechanism of viscosity, is universal and powerful for all liquid suspe

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37

Wang, Long, Zhiyong Yang, Xiangdong Chen, Ruixiang Zhang, and Yu Zhou. "Research on adaptive speed control method of an autonomous vehicle passing a speed bump on the highway based on a genetic algorithm." Mechanical Sciences 13, no. 2 (2022): 647–57. http://dx.doi.org/10.5194/ms-13-647-2022.

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Abstract. When autonomous vehicles pass through uneven roads, especially the consecutive speed control humps (SCHs) on expressways, the speed of them will have a significant influence on the safety and comfort of driving. How to automatically select the most appropriate speed has become a practical research subject. This paper studies the nonlinear vibration process of the suspension system when the autonomous vehicle passes through the SCHs on a highway. Firstly, the paper establishes a four-degree-of-freedom (4-DOF) nonlinear half-vehicle model and a stimulation function of trapezoidal SCHs

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38

Ślaski, Grzegorz, and Zbyszko Klockiewicz. "The influence of shock absorber characteristics’ nonlinearities on suspension Frequency Response Function estimation and possibilities of simplified characteristics modelling." Archives of Automotive Engineering – Archiwum Motoryzacji 96, no. 2 (2022): 77–95. http://dx.doi.org/10.14669/am/151704.

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The paper shortly presents shock absorber design evolution and resulting achieved characteristics. The way in which suspension performance is evaluated is described giving information about models used for suspension parameter tuning during simulation testing of suspension transmissibility (FRF - Frequency Response Function) for most important suspension assessment criteria. More detailed information about models of shock absorber (damper) nonlinearities of characteristics allows for description of methods of linear and nonlinear suspension models FRF estimation. Testing linear suspension mode

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39

Liu, Canchang, Chicheng Ma, Jilei Zhou, Lu Liu, Shuchang Yue, and Qingmei Gong. "Feedback control for two-degree-of-freedom vibration system with fractional-order derivative damping." Journal of Low Frequency Noise, Vibration and Active Control 37, no. 3 (2017): 554–64. http://dx.doi.org/10.1177/1461348417725958.

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A two-degree-of-freedom nonlinear vibration system of a quarter vehicle suspension system is studied by using the feedback control method considered the fractional-order derivative damping. The nonlinear dynamic model of two-degree-of-freedom vehicle suspension system is built and linear velocity and displacement controllers are used to control the nonlinear vibration of the vehicle suspension system. A case of the 1:1 internal resonance is considered. The amplitude–frequency response is obtained with the multiscale method. The asymptotic stability conditions of the nonlinear system can be got

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40

Zhao, Zi Yue, Zhi Hong Fan, Jing Jun Zhang, and Zi Qiang Xia. "Research on Ride Comfort of Nonlinear Vehicle Suspension." Advanced Materials Research 605-607 (December 2012): 443–47. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.443.

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In this paper, in order to study the effect of nonlinear suspension system, a nonlinear dynamic model considering nonlinearity of suspension is built and another model with the respective of linear suspension system is developed which is for comparison. Then the dynamic equation of the model is set up. The simulation is accomplished through MATLAB/SIMULINK. It is found that the band-limited white noise module can simulate the power spectral density of road surface well. Finally, numerical simulation results indicates that an appropriate nonlinear suspension model fits reality better than a lin

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41

Chen, Jian Guo, Xia Feng, and Xiao Ling Zhang. "A Vibration Attenuation Control Algorithm of Half Vehicle Using Active Suspension." Applied Mechanics and Materials 456 (October 2013): 14–17. http://dx.doi.org/10.4028/www.scientific.net/amm.456.14.

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Vehicle suspension is a MIMO coupling nonlinear system; its vibration couples that of the tires. For the suspension without decoupling, the vibration attenuation is difficult to be controlled precisely. In order to attenuate the vibration of the vehicle effectively, a nonlinear half vehicle model with active suspension is established and a differential geometry approach is used to decouple the nonlinear suspension system. The decoupled system becomes independent linear subsystems, though pole assignment, the vibration attenuation of the sprung mass is achieved. The simulations show that the ve

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42

Hassanzadeh, Iraj, Ghasem Alizadeh, Naser Pourqorban Shirjoposht, and Farzad Hashemzadeh. "A New Optimal Nonlinear Approach to Half Car Active Suspension Control." International Journal of Engineering and Technology 2, no. 1 (2010): 78–84. http://dx.doi.org/10.7763/ijet.2010.v2.104.

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43

Liu, Xiaofu, Jason Z. Jiang, Andrew Harrison, and Xiaoxiang Na. "Truck suspension incorporating inerters to minimise road damage." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 10-11 (2020): 2693–705. http://dx.doi.org/10.1177/0954407020905149.

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Road damage caused by heavy vehicles is a serious problem experienced worldwide. This paper investigates the potential for reduction in road damage by incorporating the inerter element into truck suspension systems. Initially, quarter-car, pitch-plane and roll-plane models with two low-complexity inerter-based linear suspension layouts are investigated in the frequency domain. Reductions of the J95 road damage index for each model are identified against conventional parallel spring–damper truck suspension layouts. It is also shown that the proposed suspensions are capable of enhancing the roll

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44

Wang, Jing Yue, Hao Tian Wang, and Li Min Zheng. "Chaos Control of Vehicle Nonlinear Suspension System with Multi-Frequency Excitations by Nonlinear Feedback." Applied Mechanics and Materials 55-57 (May 2011): 1156–61. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.1156.

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Анотація:

Vehicle suspension system with hysteretic nonlinearity has obvious nonlinear characteristics, which directly cause the system to the possibility of existence of bifurcation and chaos. Two degrees of freedom for the 1/4 body suspension model is established and the behavior of the system under road multi-frequency excitations is analyzed. In the paper, it reveals the existence of chaos in the system with the Poincaré map, phase diagram, time history graph, and its chaotic behavior is controlled by nonlinear feedback. Numerical simulation shows the effectiveness and feasibility of the control met

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45

Liu, De Jun, Hui Da Duan, and Zhen Xiong Zhou. "Control of Magnetic Suspension Linear Feed System." Advanced Materials Research 616-618 (December 2012): 1918–21. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.1918.

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A magnetic suspension linear feed device has been introduced in this paper, it is consist of linear motion and suspension parts. The mathematical model of suspension system is modeled. Aiming at the suspension part which is an nonlinear and strong coupling system, the auto-disturbance rejection controller (ADRC) is used. The inner disturbance and outside disturbance is observed and compensated, the result of simulation indicates the suspension control A magnetic suspension linear feed device has been introduced in this paper, it is consist of linear motion and suspension parts. The mathematica

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46

Milgrom, Mordehai. "Suspension and levitation in nonlinear theories." Physics Letters A 243, no. 1-2 (1998): 33–37. http://dx.doi.org/10.1016/s0375-9601(98)00166-2.

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47

McKenna, P. J., and W. Walter. "Nonlinear oscillations in a suspension bridge." Archive for Rational Mechanics and Analysis 98, no. 2 (1987): 167–77. http://dx.doi.org/10.1007/bf00251232.

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48

Malík, Josef. "Generalized nonlinear models of suspension bridges." Journal of Mathematical Analysis and Applications 324, no. 2 (2006): 1288–96. http://dx.doi.org/10.1016/j.jmaa.2006.01.003.

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49

Yan, Zhenhua, Bing Zhu, Xuefei Li, and Guoqiang Wang. "Modeling and Analysis of Static and Dynamic Characteristics of Nonlinear Seat Suspension for Off-Road Vehicles." Shock and Vibration 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/938205.

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Анотація:

Low-frequency vibrations (0.5–5 Hz) that harm drivers occur in off-road vehicles. Thus, researchers have focused on finding methods to effectively isolate or control low-frequency vibrations. A novel nonlinear seat suspension structure for off-road vehicles is designed, whose static characteristics and seat-human system dynamic response are modeled and analyzed, and experiments are conducted to verify the theoretical solutions. Results show that the stiffness of this nonlinear seat suspension could achieve real zero stiffness through well-matched parameters, and precompression of the main spri

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50

Fan, Yang, Zhi Guo Jiang, and Lu Feng Yao. "Large Nonlinear Optical Absorption Response in Monolayer Graphene and Graphene Oxide." Advanced Materials Research 510 (April 2012): 768–71. http://dx.doi.org/10.4028/www.scientific.net/amr.510.768.

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Nonlinear absorption of monolayer graphene and graphene oxide suspensions were studied in the wavelength of 800 nm by Z-scan method with 50fs pulses. Large reverse saturable absorption is observed in graphene, while graphene oxide shows saturable absorption at the incident intensity of 46 GW/cm2. The values of nonlinear absorption coefficient also have been determined from the experimental data. The NLA coefficient β of the monolayer graphene suspension is 1.96×10-2cm/GW,while the NLA coeffiecient β of graphene oxide is-6.84×10-3cm/GW.

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