A new methodology to calculate the equivalent stiffness matrix of the suspension structure with flexible linkages

The purpose of this work is to present a methodology for calculating the equivalent stiffness matrix of the wheel center of the vehicle suspension. For a suspension, the stiffness matrix of the wheel center, which is effected by the bushings and flexible linkages, control the suspension’s elasto-kinematic ( e–k) specification. The equivalent stiffness matrix of the wheel center is formulated by using the stiffness of the bushings and linkages. And the models of series and parallel springs are used to calculate this equivalent stiffness matrix based on the number of the bushings and linkages. An example is presented to illustrate how to use the proposed methodology to derive the equivalent stiffness matrix of a suspension system with three bushings and flexible linkages. The results show that the equivalent stiffness of the wheel center will decrease if the linkage stiffness is considered. This methodology can be used in all kinds of suspension structure. It can also be used to optimize and design the suspension system.

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A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension

Recent Patents on Mechanical Engineering ◽

10.2174/2212797612666190808100422 ◽

2019 ◽

Vol 12 (4) ◽

pp. 357-366

Author(s):

Yong Song ◽

Shichuang Liu ◽

Jiangxuan Che ◽

Jinyi Lian ◽

Zhanlong Li ◽

...

Keyword(s):

Strong Shock ◽

Artificial Muscle ◽

Suspension System ◽

Vehicle Body ◽

Vehicle Suspension ◽

Pneumatic Artificial Muscle ◽

Advantages And Disadvantages ◽

Road Excitation ◽

Vehicle Suspension System ◽

Suspension Structure

Background: Vehicles generally travel on different road conditions, and withstand strong shock and vibration. In order to reduce or isolate the strong shock and vibration, it is necessary to propose and develop a high-performance vehicle suspension system. Objective: This study aims to report a pneumatic artificial muscle bionic kangaroo leg suspension to improve the comfort performance of vehicle suspension system. Methods: In summarizing the existing vehicle suspension systems and analyzing their advantages and disadvantages, this paper introduces a new patent of vehicle suspension system based on the excellent damping and buffering performance of kangaroo leg, A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension. According to the biomimetic principle, the pneumatic artificial muscles bionic kangaroo leg suspension with equal bone ratio is constructed on the basis of the kangaroo leg crural index, and two working modes (passive and active modes) are designed for the suspension. Moreover, the working principle of the suspension system is introduced, and the rod system equations for the suspension structure are built up. The characteristic simulation model of this bionic suspension is established in Adams, and the vertical performance is analysed. Results: It is found that the largest deformation happens in the bionic heel spring and the largest angle change occurs in the bionic ankle joint under impulse road excitation, which is similar to the dynamic characteristics of kangaroo leg. Furthermore, the dynamic displacement and the acceleration of the vehicle body are both sharply reduced. Conclusion: The simulation results show that the comfort performance of this bionic suspension is excellent under the impulse road excitation, which indicates the bionic suspension structure is feasible and reasonable to be applied to vehicle suspensions.

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Synthesis of a high-speed tracked vehicle suspension system--Part I: Problem statement, suspension structure, and decomposition

IEEE Transactions on Automatic Control ◽

10.1109/tac.1977.1101450 ◽

1977 ◽

Vol 22 (2) ◽

pp. 158-165 ◽

Cited By ~ 8

Author(s):

C. Guenther ◽

C. Leondes

Keyword(s):

High Speed ◽

Suspension System ◽

Vehicle Suspension ◽

Problem Statement ◽

Tracked Vehicle ◽

System Part ◽

Vehicle Suspension System ◽

Suspension Structure

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A Review on the Design and Analysis of Vehicle Suspension System

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v7i7.415 ◽

2021 ◽

Author(s):

Rashmi Paliwal ◽

Rahul Shrivastava

Keyword(s):

Global Warming ◽

Maximum Load ◽

Suspension System ◽

The Other ◽

Vehicle Suspension ◽

Lower Triangle ◽

Vehicle Suspension System ◽

Suspension Structure

In automobiles, a double-wishbone suspension is an independent suspension structure that uses two wishbones to support the wheel and the maximum load is transferred from the upper wishbone to the lower one, which can lead to failure and deflection of the triangle wheel inferior. The developed lower triangle consists of three holes at one end which are attached to the wheel hub, and the other end is connected to the frame, which is placed between the steering arms. This article introduces the vehicle's engine and suspension system, as well as the description of global warming and the effects of global warming.

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A Magnetoelectric Hybrid Hydraulic Damper for the Mining Robot Suspension System

Shock and Vibration ◽

10.1155/2021/5479423 ◽

2021 ◽

Vol 2021 ◽

pp. 1-20

Author(s):

Kun Hu ◽

Fei Li ◽

Zhiyuan Zhang ◽

Shuang Wang ◽

Hao Jiang

Keyword(s):

Suspension System ◽

Equivalent Stiffness ◽

Vibration Displacement ◽

Hydraulic Damper ◽

Equivalent Damping ◽

System A ◽

Acceleration Amplitude ◽

Working Principle ◽

Stiffness And Damping ◽

Suspension Structure

In order to improve the damping and controllability of the mining robot suspension system, a new magnetoelectric hybrid suspension hydraulic damper, which is a semiactive suspension damper, is proposed based on the traditional hydraulic damper by introducing the magnetic-electric hybrid suspension structure. The structure and working principle of the damper are introduced, respectively, and the mathematical models of the equivalent stiffness and equivalent damping of the system are calculated by the magnetic circuit method and the oil circuit method, while AMESim/Simulink cosimulation is carried out. In order to test the damping performance, a prototype of the magnetoelectric hybrid suspension hydraulic damper was fabricated. The results show that the vibration displacement amplitude can be reduced by 20% and the vibration acceleration amplitude can be reduced by 10% by adjusting the stiffness and damping of the system due to the magnetoelectric hybrid suspension structure. Moreover, the experimental results are consistent with the simulation results, which verify the effectiveness and superiority of this type of damper.

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