Beneficial stiffness design of a high-static-low-dynamic-stiffness vibration isolator based on static and dynamic analysis

Wang, Xiaojie; Liu, Hui; Chen, Yinqi; Gao, Pu

doi:10.1016/j.ijmecsci.2018.04.053

Cited by 112 publications

(20 citation statements)

References 35 publications

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“…In addition, spring structures can also be used to improve device design. A typical horizontal-spring NSVID is designed with sliding block-bar structures, which has been applied to the vibration isolation of vehicle seat (Le and Ahn, 2011, 2013a, 2013b; Wang et al, 2018). In the horizontal-spring device, an additional damper is installed in vertical direction and two symmetrical sliding block-bar structures are installed in horizontal direction.…”

Section: Classification Of Nsvidsmentioning

confidence: 99%

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Negative stiffness devices for vibration isolation applications: A review

2020

Advances in Structural Engineering

126

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In recent years, negative stiffness vibration isolation device with nonlinear characteristic has become an emerging research area and attracted a significant amount of attentions in the community due to the promising potentials it brought into the field. Its high-static-low-dynamic stiffness property endows the capacity to realize effective vibration isolation and in the meantime to maintain the system stability. This article presents a comprehensive review of the recent research and developments on negative stiffness vibration isolation device. It begins with an introduction on the concept of negative stiffness and then provides a summary and discussion regarding the realization and characteristics of negative stiffness vibration isolation device. The article places its special interest on the principles, structure design, and device characterisation of different types of negative stiffness vibration isolation devices, including spring type, pre-bucked beam type, magnetism type, geometrically nonlinear structural type, and composite structural type. Besides, the applications of negative stiffness vibration isolation device, as well as negative stiffness damper, are summarized and discussed based on the current state-of-the-art. Finally, the conclusions and further discussion provide highlights of the investigation.

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Section: Classification Of Nsvidsmentioning

confidence: 99%

“…Horizontal-spring NSVID: (a) schematic representation; (b) stiffness–displacement characteristic γ 2 = b / L 0 (Le and Ahn, 2011, 2013a, 2013b; Wang et al, 2018). …”

Section: Classification Of Nsvidsmentioning

confidence: 99%

Negative stiffness devices for vibration isolation applications: A review

2020

Advances in Structural Engineering

126

View full text Add to dashboard Cite

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“…(1) Complex structure and many components. (2-DOF) Highstatic-lowdynamic stiffness (HSLDS) vibration isolator system [64] (1) The mass M is connected to the base through two horizontal springs and a connecting bar and a vertical spring (2) Horizontal springs are connected between the base and two rollers, and are able to slide in the horizontal direction freely (3) The connecting bar is linked between the roller and mass at point P. Thus, the mass can move vertically.…”

Section: Passive Vibration Isolation Designsmentioning

confidence: 99%

“…There are only simulation results and no experimental validation for the vibration isolator system. Xiaojie [64] presented a HSLDS vibration isolator system that provides excellent micro-vibration isolation performance at low frequencies. As the isolator system works under a micro-vibration environment, the maximum response amplitude is limited.…”

Section: Natural Frequencymentioning

confidence: 99%

Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System

et al. 2020

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This review focuses on studying passive vibration isolation techniques and their applications. Advantages and disadvantages of different vibration isolation techniques will be compared in order to find an innovative method to reduce seating suspension system vibration and improve the ride comfort of vehicles’ drivers. Quasi-zero stiffness (QZS) isolators of high-static–low-dynamic stiffness are found to have good application prospects in low-frequency vibration isolation. In order to improve the isolation performance of the seating suspension system, a specially made seat cushion will be studied where a quasi-zero stiffness (QZS) isolator such as a double-diamond isolator is selected as one of the cells/units/elements of the seat cushion mattress. The double-diamond isolator structure does not represent the whole seating suspension system. The transmissibility ratio of the double-diamond isolator is evaluated by analytical and simulation models and compared to that of a conventional linear spring isolator. Although the performance of the passive vibration isolation/control system is usually worse than that of the active or semi-active control system, the cost of the passive vibration isolation/control system is lower than that of the active and semi-active control system, and the relative simplicity of adding a vibration isolation cushion mattress in an existing passive seating suspension system makes it low in cost, easy to implement, and more attractive than the active and semi-active vibration control systems.

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“…Vibration isolation can be achieved by the reduction of the natural frequency of the system. 14–18 However, the frequency band of a passive torsional shock absorber is limited by the structure and material, and it is difficult to achieve the satisfactory vibration results. Active control methods to reduce transmission vibration are mainly based on motor control strategies, including torque control and current control.…”

Section: Introductionmentioning

confidence: 99%

Torque ripple compensation control for hybrid UGVs in mode transition based on current harmonic control of a PMSM

Zhang

Liu

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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Load jumping and mode transitions both cause the unstable dynamic states for compound power-split hybrid Unmanned Ground Vehicles (UGVs), and these phenomena lead to vibrations of the transmission system and longitudinal buffeting of the vehicle. This study presents a feed-forward compensation control strategy for load jumping and mode transitions to reduce the corresponding torsional vibration in hybrid UGVs. The proposed method injects an appropriate harmonic current into a permanent magnet synchronous motor (PMSM) to generate a harmonic torque that is opposite to the load torque, which improves the dynamic response quality of the vehicle load. First, the multimode structure of a hybrid UGV and mode switching vibration and shock are investigated, as well as a feed-forward compensate control architecture is proposed. Second, two models are established the PMSM dynamic model based on the electromagnetic coupling principle and a 2-degree-of-freedom torsional vibration model of transmission system by simplifying the vehicle system. Third, the harmonic current injection method is proposed, and the harmonic current equation is derived. Based on the field-oriented control algorithm, a double closed-loop controller is designed for the torque and speed of the PMSM, and the internal model control method is applied to design the current controller. The simulation results show that the proposed strategy effectively suppresses jerk and that the harmonics current transfers the energy from the mechanical vibrations of the system into electric power fluctuations.

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Beneficial stiffness design of a high-static-low-dynamic-stiffness vibration isolator based on static and dynamic analysis

Cited by 112 publications

References 35 publications

Negative stiffness devices for vibration isolation applications: A review

Negative stiffness devices for vibration isolation applications: A review

Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System

Torque ripple compensation control for hybrid UGVs in mode transition based on current harmonic control of a PMSM

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