Handling transient response of a vehicle with a planar suspension system

2011 ◽  
Vol 225 (11) ◽  
pp. 1445-1461 ◽  
Author(s):  
J J Zhu ◽  
A Khajepour ◽  
E Esmailzadeh
Keyword(s):  
Longitudinal Direction ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Vehicle Handling ◽  
Handling Performance ◽  
Conventional Vehicle ◽  
The Road ◽  
Vehicle Suspension System ◽  
Novel Design ◽  
Better Than

A novel design of a planar suspension system (PSS) is proposed to overcome the limitation of a conventional vehicle suspension system that cannot sufficiently absorb the vibrations and shocks caused by the road obstacles in the longitudinal direction because of the very stiff longitudinal connections between the chassis and the wheels. The rather stiff longitudinal linkages are replaced by a spring–damper strut. The results of the investigation into the transient handling behaviour of a vehicle with a PSS in three different scenarios are presented. These include a vehicle turning on a bumpy road, a vehicle turning combined with braking, and a lane change manoeuvre combined with acceleration. The results obtained from this study demonstrate that the PSS vehicle can effectively suppress the vibrations and shocks in the longitudinal direction without causing the handling performance to deteriorate. It has been shown that the vehicle-handling behaviour is generally comparable with, and under some conditions even better than, those reported for vehicles with a conventional suspension system.

Comparative Study of Turning Performance Between a Vehicle With Planar Suspension Systems and a Conventional Vehicle

2010 ◽  
Author(s):  
Jian Jun Zhu ◽  
Amir Khajepour ◽  
Ebrahim Esmailzadeh
Keyword(s):  
Comparative Study ◽  
Weight Distribution ◽  
Longitudinal Direction ◽  
Suspension System ◽  
Concept Design ◽  
Handling Performance ◽  
Conventional Vehicle ◽  
Suspension Systems ◽  
Novel Concept ◽  
Better Than

In a conventional vehicle, the vibration caused by road obstacles can not be effectively isolated in the longitudinal direction due to the fact that the longitudinal connections between the chassis and wheels are typically very stiff compared with the vertical connections. To overcome this limitation, a novel concept design of a planar suspension system (PSS) is proposed. The rather stiff longitudinal linkages are replaced by elastic ones in a PSS so that the vibration along any direction in the wheel plane can be effectively isolated. The soft longitudinal connection can change the wheelbase and the vehicle’s weight distribution at the front and rear wheels, and may further change the handling performance. This paper presents a comparative study of the handling behaviour of a PSS vehicle and a similar conventional vehicle in cases of a combining operation between a turning and acceleration, and a turning on a road with pothole. The study demonstrates that the PSS vehicle has the potential to absorb the vibration in the longitudinal direction without sacrificing the handling performance. The handling behaviour of a PSS vehicle is generally comparable with, and under some conditions, even better than that of a conventional vehicle.

scholarly journals Design of LQG Controller for Active Suspension without Considering Road Input Signals

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Hui Pang ◽  
Ying Chen ◽  
JiaNan Chen ◽  
Xue Liu
Keyword(s):  
Angular Acceleration ◽  
Active Suspension ◽  
Suspension System ◽  
Vehicle Body ◽  
Vehicle Suspension ◽  
Linear Quadratic ◽  
The Road ◽  
Input Signals ◽  
Vehicle Suspension System ◽  
Weight Coefficients

As the road conditions are completely unknown in the design of a suspension controller, an improved linear quadratic and Gaussian distributed (LQG) controller is proposed for active suspension system without considering road input signals. The main purpose is to optimize the vehicle body acceleration, pitching angular acceleration, displacement of suspension system, and tire dynamic deflection comprehensively. Meanwhile, it will extend the applicability of the LQG controller. Firstly, the half-vehicle and road input mathematical models of an active suspension system are established, with the weight coefficients of each evaluating indicator optimized by using genetic algorithm (GA). Then, a simulation model is built in Matlab/Simulink environment. Finally, a comparison of simulation is conducted to illustrate that the proposed LQG controller can obtain the better comprehensive performance of vehicle suspension system and improve riding comfort and handling safety compared to the conventional one.

Static Analysis of Advanced Composites for the Optimal Design of an Experimental Lightweight Solar Vehicle Suspension System

2014 ◽  
Author(s):  
Warren S. Hurter ◽  
Nickey Janse Van Rensburg ◽  
Daniel M. Madyira ◽  
Gert Adriaan Oosthuizen
Keyword(s):  
Carbon Fiber ◽  
Adhesive Bonding ◽  
Technology Development ◽  
Surface Characteristics ◽  
Suspension System ◽  
Vehicle Suspension ◽  
The Road ◽  
Advanced Composites ◽  
Lap Shear ◽  
Vehicle Suspension System

To create an energy efficient vehicle there are a number of aspects that need to be optimized, namely; the drive train of the vehicle and energy source, aerodynamics and weight. Focusing on weight reduction, while still maintaining the desired performance and structural strength, many manufacturers are turning to advanced composites due to their superior strength to weight characteristics. Solar car racing provides a research platform that drives this innovation through technology development and efficiency. A lightweight vehicle suspension system design is being presented, together with an introduction into future testing. A suspension system is made up of a number of critical components which are dynamically loaded during standard operation due to undulating forces imposed by the road surface. Unidirectional cross-wound carbon fiber tubing is used for suspension and steering arms. The tubing is interfaced with small steel inserts and pivoting arm tie rod ends. Concerns within the design are the adhesive bonding of the carbon tubing to the steel inserts, and what type of tensile loading the interface can withstand. Due to forces imposed on the system during cornering and shock loading the components are required to withstand a minimum of 1.2 times the weight of the overall vehicle, i.e. 258 kg. Tensile test results show that the mechanical properties of the adhesive joints rely somewhat on the surface characteristics and bond preparation. The target load of 258 kg was successfully obtained under static loading for two types of sample sets. The first based on the standard for describing the lap shear strength of adhesively bonded carbon fiber to aluminum, and the second based on the working component itself.

Optimal Active Control of Vehicle Suspension System Including Time Delay and Preview for Rough Roads

2002 ◽  
Vol 8 (7) ◽  
pp. 967-991 ◽  
Author(s):  
Javad Marzbanrad ◽  
Goodarz Ahmadi ◽  
Yousef Hojjat ◽  
Hassan Zohoor
Keyword(s):  
Ride Comfort ◽  
Three Dimensional ◽  
Suspension System ◽  
Road Surface ◽  
Vehicle Suspension ◽  
Control Force ◽  
Preview Control ◽  
The Road ◽  
Road Surface Roughness ◽  
Vehicle Suspension System

An optimal preview control of a vehicle suspension system traveling on a rough road is studied. A three-dimensional seven degree-of-freedom car-riding model and several descriptions of the road surface roughness heights, including haversine (hole/bump) and stochastic filtered white noise models, are used in the analysis. It is assumed that contact-less sensors affixed to the vehicle front bumper measure the road surface height at some distances in the front of the car. The suspension systems are optimized with respect to ride comfort and road holding preferences including accelerations of the sprung mass, tire deflection, suspension rattle space and control force. The performance and power demand of active, active and delay, active and preview systems are evaluated and are compared with those for the passive system. The results show that the optimal preview control improves all aspects of the vehicle suspension performance while requiring less power. Effects of variation of preview time and variations in the road condition are also examined.

scholarly journals Optimization of Nonlinear Passive Suspension System to Minimize Road Damage for Heavy Goods Vehicle

2021 ◽  
Vol 26 (1) ◽  
pp. 56-63
Author(s):  
Shailendra Kumar ◽  
Amit Medhavi ◽  
Raghuvir Kumar
Keyword(s):  
Suspension System ◽  
Fourth Power ◽  
Vehicle Suspension ◽  
Efficient Design ◽  
Vehicle Handling ◽  
Passive Suspension ◽  
The Road ◽  
Automobile Suspension ◽  
Passive Suspension System ◽  
The Cost

Major contributors to the road damage are Heavy Goods Vehicles (HGV), resulting in high maintenance costs of roads. This high cost makes it necessary to look into the issue seriously for minimizing the road damage. An Automobile Engineer can reduce road damage through the efficient design of a suspension system. The design involves satisfying the two conflicting criteria of riding comfort and vehicle handling with the restriction on the suspension travel. This paper involves designing an automobile suspension system, to improve the performance of the vehicle without a significant change in the cost of the suspension system and minimize road damage. To achieve the aforesaid objective, the use of a nonlinear passive suspension is suitable as compared to a linear passive suspension system. For the analysis, a HGV model of vehicle suspension has been considered. The suspension system considered for investigation comprises of a cubical nonlinear spring and a linear damper. Road damage has been represented by the fourth power of the tire dynamic load. A genetic algorithm has been used to optimize the half truck model to minimize road damage. The solution has been obtained using MATLAB and SIMULINK.

Magnetorheological damper in semi-active vehicle suspension system using SDRE control for a quarter car model

2018 ◽  
Author(s):  
Maria Aline Gonçalves ◽  
Rodrigo Tumolin Rocha ◽  
Frederic Conrad Janzen ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset
Keyword(s):  
Suspension System ◽  
Magnetorheological Damper ◽  
Vehicle Suspension ◽  
Quarter Car Model ◽  
Car Model ◽  
Quarter Car ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System

A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension

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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