scholarly journals Dynamic performance analysis and parameters perturbation study of inerter–spring–damper suspension for heavy vehicle

2020 ◽  
pp. 146134842096289
Author(s):  
Xiaofeng Yang ◽  
Long Yan ◽  
Yujie Shen ◽  
Hongchang Li ◽  
Yanling Liu
Keyword(s):  
Ride Comfort ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Angular Acceleration ◽  
Vertical Vibration ◽  
Heavy Vehicle ◽  
The Road ◽  
Multi Objective Genetic Algorithm ◽  
Parameters Perturbation ◽  
Dynamic Performance Analysis

Inerter, a new type of mass element, can increase the inertia of motion between two endpoints. In order to study the dynamic inertia effect of inerter–spring–damper suspension for heavy vehicle on ride comfort and road friendliness, the inerter–spring–damper suspension is applied and its mechanism is studied. This paper establishes a half vehicle model of inerter–spring–damper suspension for heavy vehicle. The parameters of inerter–spring–damper suspension for heavy vehicle are optimized by multi-objective genetic algorithm and system simulations are carried out. The parametric influence of different spring stiffness, damping coefficient, inertance, and load on suspension performance is also studied. The simulation results demonstrate that the centroid acceleration and pitch angular acceleration are improved by 24.90% and 23.54%, respectively, and the comprehensive road damage coefficient is reduced by 4.05%. The results illustrate that the inerter–spring–damper suspension can decrease the vertical vibration of vehicle suspension especially in low frequency and reduce the road damage. The analyses of suspension parameters perturbation reveal their different effect laws of the different wheels on vehicle ride comfort and road friendliness, which provide a theoretical basis for setting parameters of inerter–spring–damper suspension.

Simulation of Bus Ride Comfort under the Excitation of Road Irregularity

2012 ◽  
Vol 510 ◽  
pp. 249-254 ◽  
Author(s):  
Jin Feng ◽  
Yuan Hua Chen
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Ride Comfort ◽  
Temporal Frequency ◽  
Vertical Vibration ◽  
Fe Model ◽  
Analysis Method ◽  
The Road ◽  
Power Spectral ◽  
Bus Structure

Bus vibration is studied by the finite element method (FEM) base on bus structure model. The bus mathematical model of vertical vibration is established and the vibration response variables were deduced with the modal analysis method. The finite element (FE) model is established and decoupled. The transformational relation between spatial frequency displacement power spectral density (PSD) and temporal frequency displacement PSD and the sampling characteristics of the road irregularity PSD in numerical computation are discussed. Road irregularity load is modeled in software. The FE model is solved using modal analysis method and the acceleration PSD of each keypoint can be gained. Finally, a road test experiment is carried on to verify the simulation results. The example indicated that study on vehicle ride comford by FEM has instructive meaning.

The Application of Pseudo-Excitation Method to the Ride Comfort Research of Wheel-Loader

2010 ◽  
Vol 34-35 ◽  
pp. 538-543 ◽  
Author(s):  
Chun Yan Chi ◽  
Si Cheng Qin ◽  
Ding Wen Yu ◽  
Wei Jun Zhang
Keyword(s):  
Ride Comfort ◽  
Angular Acceleration ◽  
Dynamic Force ◽  
Vertical Acceleration ◽  
Pseudo Excitation Method ◽  
Wheel Loader ◽  
The Road ◽  
Theoretical Evidence ◽  
Pseudo Excitation ◽  
Excitation Method

The wheel-loader is modeled as a linear 12-DOF system in this paper for researching its ride comfort under typical working situations. The pseudo-excitation method is introduced for vibration analysis, which accuracy has been validated. By using this method and taking a certain type of wheel-loader as a representative example, the spectral density of real response of wheel-loader such as the vertical acceleration of driver, the for-and-aft angular acceleration of bucket and the wheel relative dynamic force due to different carrying capacity, speed and the road surface level are obtained. The results offer the theoretical evidence for the farther wheel-loader vibration reduction research.

scholarly journals Static and Dynamic Analysis of a 6300 KN Cold Orbital Forging Machine

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 7
Author(s):  
Zhiqiang Gu ◽  
Mingzhang Chen ◽  
Chaoyang Wang ◽  
Wuhao Zhuang
Keyword(s):  
Fatigue Life ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Optimization Method ◽  
Vertical Vibration ◽  
Element Analysis ◽  
Static And Dynamic Analysis ◽  
Low Frequency Vibration ◽  
Orbital Forging

In cold orbital forging (COF) processes, large stress, displacement and vertical vibration of the COF machine are bad for the quality of the part and the fatigue life of the COF machine. It is necessary to investigate the static and dynamic performance of the COF machine and provide methods for reducing the stress, displacement and vertical vibration of the COF machine. In this paper, finite element analysis, theoretical analysis, numerical simulation and experimental analysis were applied to study the static and dynamic performance of a 6300 KN COF machine. The static and dynamic analyses were verified effectively by carrying out strain and vertical vibration test experiments. In the static analysis, the large stress and displacement positions of the COF machine were mainly distributed near the working table and the junction between the working table and the column. Large stress and displacement will be bad for the quality of the part and the fatigue life of the COF machine. Structural optimizations of the COF machine include ribbed plates on the working table and beam. This structural optimization method of the COF machine obviously reduced the stress and displacement of the COF machine. When the angular velocities of the eccentric rings were 8π rad/s, the vertical vibration of the swing shaft is a low-frequency vibration. The existence of absorber obviously reduced the vertical vibration of the COF machine.

scholarly journals ANFIS-PID Control of Active Suspension for the Full-Scale Straddle Monorail Model

Mechanika ◽  
2020 ◽  
Vol 26 (4) ◽  
pp. 311-317
Author(s):  
Liang XIN
Keyword(s):  
Angular Velocity ◽  
Ride Comfort ◽  
Fuzzy Inference ◽  
Angular Acceleration ◽  
Active Suspension ◽  
Vertical Vibration ◽  
Full Scale ◽  
Vibration Velocity ◽  
Vertical Acceleration ◽  
Inference System

In order to improve the ride comfort straddle-type monorail, based on the full-scale straddle-type monorail model with 38-DOF, combined with the modular control thought and adaptive neural fuzzy inference system(ANFIS) control theory, the ANFIS-PID controller is designed, in which the vertical vibration velocity and acceleration, pitching angular velocity and angular acceleration, rolling angular velocity and angular acceleration are taken as inputs and the actuator force of active suspension as outputs. The results show that compared with existing passive suspension, the root mean squared values(RMS) of vertical acceleration, pitching angular acceleration and rolling angular acceleration of active suspension is significantly reduced, respectively. And the vibration amplitude below 10Hz frequency range is suppressed, which is the human sensitivity frequency. Active suspension controlled by ANFIS-PID can be used as a way to improve the ride comfort of straddle monorail vehicles.  

scholarly journals Rigid-flexible coupling modelling and dynamic performance analysis of novel flexible road wheel

2019 ◽  
Vol 234 (1) ◽  
pp. 67-81
Author(s):  
Yaoji Deng ◽  
Youqun Zhao ◽  
Han Xu ◽  
Fen Lin ◽  
Qiuwei Wang
Keyword(s):  
Dynamic Performance ◽  
Coupled Model ◽  
Vertical Vibration ◽  
Outer Ring ◽  
Vehicle Speed ◽  
Tracked Vehicles ◽  
Operation Conditions ◽  
Combined Structure ◽  
Multi Body ◽  
Dynamic Performance Analysis

A novel flexible road wheel with hub-hinge-ring combined structure is introduced to improve the buffer damping performance and lightweight level of tracked vehicles. To balance computational efficiency and precision, an advanced rigid-flexible coupled model of the flexible road wheel is established using a hybrid modelling method combining finite element method and multi-body dynamics. The reliability and accuracy of the established rigid-flexible coupled model are verified by wheel static loading experiment. The modal flexible body of the elastic outer ring is developed by modified Craig-Bampton method and the simulated results are in good agreement with the experimental data. Based on the verified rigid-flexible coupled model, the dynamic characteristics of the flexible road wheel under typical operation conditions were investigated. The simulation results show that when the motion state changes, the elastic outer ring will produce a hysteretic angle with respect to the hub, delaying the transmission of torque. The system parameters have a greater effect on the vertical vibration of the flexible road wheel. The higher the vehicle speed, the more vibration will be caused, and the increase in the load and number of hinge groups will reduce the vibration. The research results provide reference for structure optimization of flexible road wheel and lay a foundation for flexible multi-body dynamic simulation of tracked vehicles with flexible road wheels.

A novel pumping magnetorheological damper: Design, optimization, and evaluation

2017 ◽  
Vol 28 (17) ◽  
pp. 2339-2348 ◽  
Author(s):  
Xinjie Zhang ◽  
Zhihua Li ◽  
Konghui Guo ◽  
Fumiao Zheng ◽  
Zhong Wang
Keyword(s):  
Heat Dissipation ◽  
Ride Comfort ◽  
Magnetic System ◽  
Structural Parameters ◽  
Dynamic Performance ◽  
Magnetorheological Damper ◽  
Multi Objective Genetic Algorithm ◽  
Dual Stage ◽  
Structure Flexibility ◽  
Damper Design

Magnetorheological damper has been widely used for improving vehicle ride comfort and handling because of its excellent performance. Numerous reinforced structures of magnetorheological dampers have been developed to enhance their dynamic performance and heat dissipation. This article presents a novel pumping magnetorheological damper with one-way pumping flow and dual-stage coil-in-cylinder magnetic system. Its dynamic model and inductive time constant are derived. Then, the structural parameters are optimized via a fast multi-objective genetic algorithm. Furthermore, a pumping magnetorheological damper prototype is tested and evaluated. The proposed pumping magnetorheological damper is able to perfectly balance the dynamic performance, heat dissipation efficiency, and structure flexibility via one-way pumping flow and coil-in-cylinder magnetic system, which has a promising application prospect in semi-active suspensions.

Study on the LQG Control of Acceleration/Braking System Based on Wheelbase Preview

2011 ◽  
Vol 105-107 ◽  
pp. 566-570
Author(s):  
Gong Yu Pan ◽  
Yu Huang
Keyword(s):  
Optimal Control ◽  
Dynamic Model ◽  
Ride Comfort ◽  
Angular Acceleration ◽  
Front Wheel ◽  
Preview Control ◽  
The Road ◽  
Braking System ◽  
Air Suspension ◽  
Road Surface Roughness

A dynamic model of semi-vehicle under acceleration/braking condition based on air suspension was established. By applying wheelbase preview control to forecast the road surface roughness at the front wheel, the optimal controller based on wheelbase preview control theory was designed. Then the dynamic model was simulating with the MATLAB. The results show that both optimal control and optimal control with wheelbase preview can effectively reduce vibration of acceleration/braking system, which make an improvement in the vehicle’s ride comfort and handing stability. Finally, a controller based on wheelbase preview of air active suspension acceleration/braking system was designed, and then simulation was analyzed with white noise input. Centric acceleration, pitch angular acceleration and rear tire dynamic load of the back section were reduced significantly proving pre-wheelbase control can further improve the performance of the vehicle potentially, especially having an effect on decreasing the vibration of rear suppression.

Unknown Road Profile Input Estimation with Two Levels of Complexity Models

2020 ◽  
Vol 50 ◽  
pp. 113-130
Author(s):  
Fatima Ezzahra Saber ◽  
Mohamed Ouahi ◽  
Abdelmjid Saka
Keyword(s):  
Ride Comfort ◽  
Estimation Method ◽  
Vertical Vibration ◽  
Driver Assistance ◽  
Driver Assistance Systems ◽  
Input Estimation ◽  
The Road ◽  
Suspension Systems ◽  
Road Profile ◽  
Road Excitation

Most advanced driver assistance systems (ADAS) are intended to improve ride comfort for vehicle suspension systems. A new road estimation method is proposed as a means of observing the road profile level. To achieve this, two complexity levels (quarter car and half car models) are presented and developed in Matlab to analyze the vertical vibration of a vehicle. The unknown input observers are then designed for observing unknown states and road profile level. The necessary measurements are the accelerations of the centers of the wheels. The results of simulations conducted with random road excitation show successfully simulated experimentations of the method using a realistic simulator as well as its robustness.

Effect of Low-frequency Vertical Vibration of Elevator on Ride Comfort

2020 ◽  
Vol 2020.29 (0) ◽  
pp. 6103
Author(s):  
Hiroyuki OWAKI ◽  
Miwako KITAMURA ◽  
Yanli ZHANG ◽  
Shinji ARAI ◽  
Junichi NAKAGAWA
Keyword(s):  
Ride Comfort ◽  
Low Frequency ◽  
Vertical Vibration

scholarly journals Network synthesis and parameter optimization for vehicle suspension with inerter

2017 ◽  
Vol 9 (1) ◽  
pp. 168781401668470 ◽  
Author(s):  
Long Chen ◽  
Changning Liu ◽  
Wei Liu ◽  
Jiamei Nie ◽  
Yujie Shen ◽  
...  
Keyword(s):  
Transfer Function ◽  
Ride Comfort ◽  
Dynamic Performance ◽  
Synthesis Method ◽  
Vertical Vibration ◽  
Vehicle Body ◽  
Vehicle Suspension ◽  
Network Synthesis ◽  
Quantum Genetic Algorithm ◽  
Quarter Car Model

In order to design a comfortable-oriented vehicle suspension structure, the network synthesis method was utilized to transfer the problem into solving a timing robust control problem and determine the structure of “inerter–spring–damper” suspension. Bilinear Matrix Inequality was utilized to obtain the timing transfer function. Then, the transfer function of suspension system can be physically implemented by passive elements such as spring, damper, and inerter. By analyzing the sensitivity and quantum genetic algorithm, the optimized parameters of inerter–spring–damper suspension were determined. A quarter-car model was established. The performance of the inerter–spring–damper suspension was verified under random input. The simulation results manifested that the dynamic performance of the proposed suspension was enhanced in contrast with traditional suspension. The root mean square of vehicle body acceleration decreases by 18.9%. The inerter–spring–damper suspension can inhibit the vertical vibration within the frequency of 1–3 Hz effectively and enhance the performance of ride comfort significantly.

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