Correlation Study on Vehicle Dynamics Handling Performance Parameters

2022 ◽  
pp. 577-588
Author(s):  
Wan’an Yang ◽  
Hongjun Liu ◽  
Yunxiang Shi
Keyword(s):  
Vehicle Dynamics ◽  
Correlation Study ◽  
Performance Parameters ◽  
Handling Performance

Influence of Tire Inflation Pressure on Vehicle Dynamics and Handling Performance

2019 ◽  
Author(s):  
Jianyang Wu ◽  
Zhenpo Wang ◽  
Junmin Wang
Keyword(s):  
Vehicle Dynamics ◽  
Stability Index ◽  
Lane Change ◽  
Pressure Reduction ◽  
Inflation Pressure ◽  
Tire Pressure ◽  
Sideslip Angle ◽  
Handling Performance ◽  
Vehicle Path ◽  
Rear Tire

Abstract Tire inflation pressure affects both tire longitudinal and lateral stiffness and thus may impose a considerable influence on vehicle dynamics and handling performance. This paper presents a comprehensive study revealing the effects of tire pressure variations and their distribution among four tires on vehicle dynamics and handling performance. An extended Magic Formula tire model and a modified UniTire model involving tire inflation pressure are employed to describe the tire longitudinal and lateral forces, respectively. Two groups of vehicle maneuvers are simulated in CarSim: a single lane change maneuver with braking and a double lane change maneuver, to exhibit the effects of tire inflation pressure. Various tire pressure variations including all four tires at same and different pressures are examined. A vehicle dynamics, lateral motion stability index, and driver steering workload are utilized to quantify the influence of tire pressure variations and distributions. Analyses on the simulation results indicate that: 1) a front tire pressure reduction induces vehicle understeering tendency and a larger steering angle; 2) a rear tire pressure reduction causes oversteering characteristics and a sacrifice on vehicle stability with a larger vehicle sideslip angle; 3) all-tire inflation pressure decrease will increase driver’s steering workload; and 4) lower rear-tire inflation pressure can promote the combined performance of vehicle path-tracking and driver’s steering workload.

Advanced Vehicle Dynamics Through Active Aerodynamics and Active Body Control

2020 ◽  
Author(s):  
Henrique de Carvalho Pinheiro ◽  
Francesco Russo ◽  
Lorenzo Sisca ◽  
Alessandro Messana ◽  
Davide De Cupis ◽  
...  
Keyword(s):  
Control Systems ◽  
Concurrent Engineering ◽  
Vehicle Dynamics ◽  
Control Algorithm ◽  
Ad Hoc ◽  
Fuzzy Logic System ◽  
Control Algorithms ◽  
Active Suspensions ◽  
Handling Performance ◽  
Logic System

Abstract In this paper, the development procedure of an innovative control algorithm is shown, with the aim of improving handling performance of a high-end sport vehicle by actively controlling aerodynamic forces acting on the vehicle itself. The proposed control algorithm operates indirectly by modifying ride-heights of the vehicle through an active suspensions system. The vehicle dynamics analysis is conducted in parallel to the aerodynamics analysis performed in a concurrent engineering operation. The software used for control algorithms development is VI-CarRealTime, in co-simulation with Matlab-Simulink, with an extended use of the MaxPerformance package. Specific tracks have been implemented ad hoc to highlight the effects of the control systems operation in development phase. To better explore the potential of the technique, a fuzzy logic system was developed.

Handling Performance Improvement via Steering Reactive Torque Design Based on Integrated Driver-Vehicle Model

2017 ◽  
Author(s):  
Shuai Cheng ◽  
Jian Song ◽  
Zhenghong Lu ◽  
Wenlong Dong
Keyword(s):  
Vehicle Dynamics ◽  
High Speed ◽  
Driving Simulator ◽  
Longitudinal Velocity ◽  
Design Procedure ◽  
Vehicle Speed ◽  
Lateral Stability ◽  
Vehicle Model ◽  
Handling Performance ◽  
Speed Condition

In some specific driving conditions, the steering behavior of the driver is significantly influenced by the reactive torque of the steering system. According to the vehicle dynamics, the steering angle along with the longitudinal velocity determines the vehicle states as well as the driving feeling. Thus, the steering reactive torque shows a remarkable influence on the evaluation of the lateral stability in high-speed condition. Given that the steady state gain increases with the velocity, this effect is especially significant in the high speed condition. As a result, the steering reactive torque must be designed to match the vehicle speed properly. However, except for simple experiential method, no normative design procedure of the reactive torque is proposed at present. In this paper, the influence of the steering reactive torque on the driver’s steering behavior is studied on the basis of the integrated neuromuscular system (NMS) vehicle model, which shows that a larger reactive torque could effectively restrain the unnecessary rapid steering operations and thus improve the handling performance of the vehicle. Key states of the vehicle dynamics is selected as the parameterized index of the physiological perception of the lateral stability. A novel design approach of the steering reactive torque is then proposed on the basis of the correlation of the reactive torque and the vehicle states. By introducing a new design principle — maintaining the physiological-perception-related dynamics states, the evaluation of the lateral stability can remain favorable despite the increasing speed. Effectiveness of the proposed design procedure is validated by a driving simulator and promising results have been obtained.

A non-linear vehicle dynamics model for accurate representation of suspension kinematics

2014 ◽  
Vol 229 (6) ◽  
pp. 1002-1014 ◽  
Author(s):  
Prashanth KR Vaddi ◽  
Cheruvu S Kumar
Keyword(s):  
Vehicle Dynamics ◽  
Degrees Of Freedom ◽  
Normal Force ◽  
Dynamics Model ◽  
Vehicle Model ◽  
Handling Performance ◽  
Suspension Spring ◽  
Full Vehicle ◽  
Non Linear ◽  
Dynamics Models

A non-linear full vehicle model for simulation of vehicle ride and handling performance is proposed. The model effectively estimates the suspension spring compressions, thus improving the accuracy of normal force calculations. This is achieved by developing models for suspension kinematics, which are then integrated with the commonly used 14 degrees of freedom vehicle dynamics models. This integrated model effectively estimates parameters like camber angles, toe angles and jacking forces, which are capable of significantly affecting the handling performance of the vehicle. The improvements in the accuracy of spring compressions help in simulating the effects of non-linear suspension elements, and the accuracy of handling simulation is enhanced by the improvements in normal force estimates. The model developed in Simulink is validated by comparing the results to that from ADAMS car.

Optimizing Tire Vertical Stiffness Based on Ride, Handling, Performance, and Fuel Consumption Criteria

2015 ◽  
Vol 137 (12) ◽  
Author(s):  
Amir Soltani ◽  
Avesta Goodarzi ◽  
Mohamad Hasan Shojaeefard ◽  
Khodabakhsh Saeedi
Keyword(s):  
Numerical Simulations ◽  
Fuel Consumption ◽  
Performance Index ◽  
Vehicle Dynamics ◽  
Design Variable ◽  
Braking Performance ◽  
Handling Performance ◽  
Vertical Stiffness ◽  
System Characteristics

Researchers mostly focus on the role of suspension system characteristics on vehicle dynamics. However tire characteristics are also influential on the vehicle dynamics behavior. In this paper, the effects of tire vertical stiffness on the ride, handling, accelerating/braking performance, and fuel consumption of a vehicle are analytically investigated. Furthermore, a method for determining the optimum vertical stiffness of tires is presented. For these purposes, first an appropriate mathematical criterion for the ride, handling, accelerating/braking performance, and fuel consumption is developed. Next, to achieve the optimum tire characteristic, a performance index, which contains all of the above-mentioned criteria, is defined and optimized. In the proposed performance index, the tire vertical stiffness is a design variable and its optimization provides a compromise among ride, handling, accelerating/braking performance, and fuel consumption of the vehicle. Last, the analytical optimization results are confirmed by performing precise numerical simulations.

Some examples of pilot/vehicle dynamics identified from flight test records

1970 ◽  
Author(s):  
Rodney C. Wingrove ◽  
Frederick G. Edwards ◽  
Armando E. Lopez
Keyword(s):  
Vehicle Dynamics ◽  
Flight Test
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