Kinematic Analysis and Simulation on Parallel Vibration Reduction Seat

2011 ◽  
Vol 464 ◽  
pp. 195-198
Author(s):  
Qi Zhi Yang ◽  
Guo Quan Huang ◽  
Chen Long ◽  
Xiao Bing Zhu
Keyword(s):  
Ride Comfort ◽  
Vibration Reduction ◽  
Simulation Models ◽  
Vibration System ◽  
Good Effort ◽  
Seat Suspension ◽  
Vehicle System ◽  
Adams Software ◽  
Seat Vibration ◽  
Vehicle Seat

Vibration of vehicle system is a typical vibration of multi-degree freedom. The damping performance of multi-degree freedom seat suspension is important to ride comfort of vehicle occupants. Based on the multi-dimensional movement principle of parallel mechanism, it is built a new vehicle seat with 3-DOF suspension. It is Established a kinematics model and then analyzed the theory of the displacement of the parallel vehicle seat system. Finally, using ADAMS software to build the simulation models of seat suspension, it is showed that the seat vibration system has a good effort on vibration reduction.

Optimal design of passenger vehicle seat with the use of negative stiffness elements

2019 ◽  
Vol 234 (2-3) ◽  
pp. 610-629 ◽  
Author(s):  
Georgios Papaioannou ◽  
Artemios Voutsinas ◽  
Dimitrios Koulocheris
Keyword(s):  
Vibration Isolation ◽  
Ride Comfort ◽  
Negative Stiffness ◽  
Vibration Isolators ◽  
Seat Suspension ◽  
Suspension Systems ◽  
Dynamic Factors ◽  
Safety And Health ◽  
The Common ◽  
Vehicle Seat

A seat that provides good vibration isolation is of prime importance for passenger’s safety and health. The main conflict in seat suspensions implies that the increasing initial deformation of the system (increase in “static discomfort”) leads to better isolation of accelerations (increase in “dynamic comfort”). Many researchers have focused on overcoming or at least suppressing this conflict between load support capacity and vibration isolation by modeling new suspension systems, such as the so-called negative suspension systems. However, apart from the modeling of new suspension systems, optimization is an important part in designing a seat and finding the best compromise between these two objectives. Thus, in this work, four types of seat suspension systems with embedded negative stiffness elements are implemented and optimized in order to be benchmarked. Three of them have already been tested either in passenger or in an off-road vehicle seat. All the vibration isolators are optimized with genetic algorithms in respect to static and dynamic factors of ride comfort by applying constraints oriented to the objectives and the design of the structure. The optimization is implemented for two excitations, which correspond to a vehicle driving over road profiles of Classes A and B, and the common solutions are outlined.

scholarly journals Effect of delayed resonator on the vibration reduction performance of vehicle active seat suspension

2021 ◽  
pp. 146134842110464
Author(s):  
Yongguo Zhang ◽  
Chuanbo Ren ◽  
Kehui Ma ◽  
Zhen Xu ◽  
Pengcheng Zhou ◽  
...  
Keyword(s):  
Time Delay ◽  
Vibration Reduction ◽  
Suspension System ◽  
Vibration Response ◽  
Vibration Absorber ◽  
Dynamic Vibration Absorber ◽  
Precise Integration ◽  
Seat Suspension ◽  
Dynamic Vibration ◽  
Seat Vibration

The combination of dynamic vibration absorber and partial state feedback with time-delay is called delayed resonator. In order to suppress the seat vibration caused by uneven road surface and improve ride comfort, the delayed resonator is applied to the seat suspension to realize active control of the seat suspension system. The dynamic model of the half-vehicle suspension system is established, and the time-delay differential equation of the system under external excitation is solved by the precise integration method. The root mean square of the time-domain vibration response of seat displacement, seat acceleration and vehicle acceleration are selected as the objective function. Then, the optimal time-delay control parameters are obtained by particle swarm optimization algorithm. The frequency sweeping method is used to obtain the critical time-delay value and time-delay stable interval of the system. Finally, an active seat suspension model with delayed resonator is established for numerical simulation. The results show that the delayed resonator can greatly suppress the seat vibration response regardless of the road simple harmonic excitation or random excitation. Compared with dynamic vibration absorber, it has a better vibration absorption effect and a wider vibration reduction frequency band.

Development and simulation evaluation of a magnetorheological elastomer isolator for seat vibration control

2012 ◽  
Vol 23 (9) ◽  
pp. 1041-1048 ◽  
Author(s):  
Weihua Li ◽  
Xianzhou Zhang ◽  
Haiping Du
Keyword(s):  
Vibration Control ◽  
Vibration Energy ◽  
Magnetorheological Elastomer ◽  
Isolation System ◽  
Road Crashes ◽  
Seat Suspension ◽  
Simulation Evaluation ◽  
Passive Isolation ◽  
Seat Vibration ◽  
Vehicle Seat

Driver fatigue is one of the leading factors contributing to road crashes. Environmental stress, such as unwanted seat vibration, is a key contributor to fatigue. This article presents the design and development of a magnetorheological elastomer isolator for a seat suspension system. By altering the magnetorheological elastomer isolator’s stiffness through a controllable magnetic field and selecting suitable control strategy, the system’s natural frequency can be changed to avoid resonance, which consequently reduce the vehicle’s vibration energy input to seat, and thus suppress the seat’s response. Experimental results show that the developed magnetorheological elastomer isolator is able to reduce vibration more when compared with the passive isolation system, indicating the significant potential of its application in vehicle seat vibration control.

Study of Commercial Vehicle Active Seat Suspension

2013 ◽  
Vol 441 ◽  
pp. 641-644
Author(s):  
Gong Yu Pan ◽  
Hai Yang ◽  
Yong Tian Liu
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Commercial Vehicle ◽  
Control Method ◽  
Simulation Models ◽  
Seat Suspension ◽  
Optimal Control Method ◽  
Simulation Results ◽  
Set Up ◽  
Vehicle Seat

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 supplied the academic reference in the applications of the active seat suspension.

The Design of Driver’s Seat Vibration System of the Road Roller Based on MATLAB

2014 ◽  
Vol 602-605 ◽  
pp. 606-609
Author(s):  
Jing Jing Xia ◽  
Jing Yu Xu ◽  
Yong Chen
Keyword(s):  
Simulation Model ◽  
Stress Analysis ◽  
Optimization Design ◽  
Ride Comfort ◽  
Model Simulation ◽  
Dynamic Equations ◽  
Vibration System ◽  
The Road ◽  
Working Principle ◽  
Seat Vibration

This project mainly studies the structure composition and the working principle of the seat vibration system of the roller . On this basis, dynamic equations are obtained according to the stress analysis of the simplified system of the seat vibration system of the roller, and then with the simulink module of MATLAB software, a simulation model is established as to the driver's seat system.Through the model simulation, the roller’s vibration of the the driver seat system is analysed,then based on the analysis, the optimization design can be done. Finally, through the research of this topic, the ride comfort of roller is been improved.

Vibration Control of an ER Seat Suspension for a Commercial Vehicle

2003 ◽  
Vol 125 (1) ◽  
pp. 60-68 ◽  
Author(s):  
S. B. Choi ◽  
J. H. Choi ◽  
Y. S. Lee ◽  
M. S. Han
Keyword(s):  
Ride Comfort ◽  
Sliding Mode ◽  
Equations Of Motion ◽  
Seat Suspension ◽  
Damping Characteristics ◽  
Frequency Domains ◽  
Fluid Damper ◽  
Seat Vibration ◽  
Practical Feasibility ◽  
Er Fluid

This paper presents a semi-active seat suspension with an electrorheological (ER) fluid damper. A cylindrical ER seat damper is devised on the basis of a Bingham model of an arabic gum-based ER fluid and its field-dependent damping characteristics are empirically evaluated. A semi-active seat suspension is then constructed, and the governing equations of motion are derived by treating the driver mass as a parameter uncertainty. A sliding mode controller, which has inherent robustness to system uncertainties, is formulated to attenuate seat vibration due to external excitations. The controller is then experimentally realized, and controlled responses are presented in both time and frequency domains. In addition, a full-car model consisting of primary, cabin, and seat suspensions is established, and a hardware-in-the-loop simulation is undertaken to demonstrate a practical feasibility of the proposed seat suspension system showing ride comfort quality under various road conditions.

scholarly journals Semi-Active Control of Vehicle Seat Suspension System with Magnetorheological Damper

2011 ◽  
Vol 2-3 ◽  
pp. 1067-1070
Author(s):  
Hai Jun Xing ◽  
Shao Pu Yang ◽  
Yong Jun Shen
Keyword(s):  
Active Control ◽  
Ride Comfort ◽  
Linear Quadratic Regulator ◽  
Suspension System ◽  
Magnetorheological Damper ◽  
Vehicle Body ◽  
Control Force ◽  
Linear Quadratic ◽  
Seat Suspension ◽  
Vehicle Seat

This research aims at the vibration control of vehicle seat suspension system. A three degree of freedom quarter vehicle model is used for semi-active control system in which a magnetorheological damper (MRD) is installed at the position between the vehicle body and the seat. A fully active linear quadratic regulator (LQR) control strategy is used to determine the optimized control force which is then matched by MRD to compute the semi-active control result. Computation result proves that semi-active control with MRD can alleviate the vehicle seat acceleration to improve ride comfort.

Singular System-Based Approach for Active Vibration Control of Vehicle Seat Suspension

2020 ◽  
Vol 142 (9) ◽  
Author(s):  
Wenxing Li ◽  
Haiping Du ◽  
Zhiguang Feng ◽  
Donghong Ning ◽  
Weihua Li ◽  
...  
Keyword(s):  
Vibration Control ◽  
Ride Comfort ◽  
Actuator Saturation ◽  
Singular System ◽  
Active Vibration Control ◽  
Seat Suspension ◽  
Active Vibration ◽  
System States ◽  
Suspension Model ◽  
Vehicle Seat

Abstract This paper proposes a singular system-based approach for active vibration control of vehicle seat suspensions, where the drivers' acceleration is augmented into the conventional seat suspension model together with seat suspension deflection and relative velocity as system states to make the suspension model as a singular system. In this novel seat suspension system, all the system states are easy to measure in real-time. A friction observer is applied to estimate the real system friction and an H∞ controller is designed to achieve the optimal ride comfort performance with consideration of the friction compensation, actuator saturation, and time delay issues. The cone complementarity linearization (CCL) algorithm is applied to solve the nonlinear constraints. The experimental results show that good ride comfort performance can be achieved by the proposed controller in both the time and frequency domain compared with the uncontrolled seat suspension.

Sign in / Sign up

Export Citation Format

Share Document