Efficient Empirical Modeling of a High-Performance Shock Absorber for Vehicle Dynamics Studies

2007 ◽  
Author(s):  
Christopher M. Boggs ◽  
Mehdi Ahmadian
Keyword(s):  
Vehicle Dynamics ◽  
High Performance ◽  
Shock Absorber ◽  
Empirical Modeling

Efficient empirical modelling of a high-performance shock absorber for vehicle dynamics studies

2010 ◽  
Vol 48 (4) ◽  
pp. 481-505 ◽  
Author(s):  
Christopher Boggs ◽  
Mehdi Ahmadian ◽  
Steve Southward
Keyword(s):  
Vehicle Dynamics ◽  
High Performance ◽  
Shock Absorber ◽  
Empirical Modelling

Direct Longitudinal Force Feedback for High-Performance Vehicle Dynamics Control Systems

2021 ◽  
Author(s):  
Giorgio Riva ◽  
Luca Mozzarelli ◽  
Matteo Corno ◽  
Simone Formentin ◽  
Sergio M. Savaresi
Keyword(s):  
Model Predictive Control ◽  
Control Systems ◽  
Predictive Control ◽  
Vehicle Dynamics ◽  
High Performance ◽  
Force Feedback ◽  
Longitudinal Force ◽  
Spiral Path ◽  
Comparable Performance ◽  
Vehicle Dynamics Control

Abstract State of the art vehicle dynamics control systems do not exploit tire road forces information, even though the vehicle behaviour is ultimately determined by the tire road interaction. Recent technological improvements allow to accurately measure and estimate these variables, making it possible to introduce such knowledge inside a control system. In this paper, a vehicle dynamics control architecture based on a direct longitudinal tire force feedback is proposed. The scheme is made by a nested architecture composed by an outer Model Predictive Control algorithm, written in spatial coordinates, and an inner longitudinal force feedback controller. The latter is composed by four classical Proportional-Integral controllers in anti-windup configuration, endowed with a suitably designed gain switching logic to cope with possible unfeasible references provided by the outer loop, avoiding instability. The proposed scheme is tested in simulation in a challenging scenario where the tracking of a spiral path on a slippery surface and the timing performance are handled simultaneously by the controller. The performance is compared with that of an inner slip-based controller, sharing the same outer Model Predictive Control loop. The results show comparable performance in presence of unfeasible force references, while higher robustness is achieved with respect to friction curve uncertainties.

Active Aerodynamics Through Active Body Control: Modelling and Static Simulator Validation

2020 ◽  
Author(s):  
Henrique de Carvalho Pinheiro ◽  
Francesco Russo ◽  
Lorenzo Sisca ◽  
Alessandro Messana ◽  
Davide De Cupis ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Control Strategy ◽  
Vehicle Dynamics ◽  
Fuzzy Logic Control ◽  
High Performance ◽  
Subjective Evaluation ◽  
The Body ◽  
Race Car ◽  
Logic Control ◽  
The Stability

Abstract Active aerodynamics is a growing field in the race car and high-performance vehicles segments, since each situation on the track may require different aero forces to achieve the best vehicle dynamics performance. This paper presents an active aerodynamics control system developed through the active control of the body trim. By interchanging four different setups on the suspension heights with a fuzzy logic control, relevant advantage is obtained in terms of lap time reduction. Two systems, a PID and a Feedforward logic, are studied to implement the control strategy and important differences are found in the stability of tire-ground forces benefiting the latter. Furthermore, the system was validated in a Driver-In-the-Loop (DIL) static simulator with a more realistic road conditions and important insights in terms of subjective evaluation.

Extended Modeling of Vertical Axis Motion Dynamics of VTOL Vehicle

2015 ◽  
Vol 789-790 ◽  
pp. 883-888 ◽  
Author(s):  
Wojciech Janusz ◽  
Roman Czyba ◽  
Grzegorz Szafrański ◽  
Michał Niezabitowski
Keyword(s):  
Vehicle Dynamics ◽  
High Performance ◽  
Vertical Axis ◽  
Open Loop ◽  
Indirect Measurements ◽  
Parameter Estimations ◽  
Landing Platform ◽  
Standard Configuration ◽  
Aerial Vehicle ◽  
Practical Model

Development of a reliable high-performance multirotor unmanned aerial vehicle (UAV) requires an accurate and practical model of the vehicle dynamics. This paper describes the process and results of the dynamic modeling of an unmanned aerial platform known as quadrotor. To model a vehicle dynamics, elementary physical and aerodynamical principles has been employed. Parameter estimations, from a UAV design have been obtained through direct and indirect measurements. In addition to standard configuration of VTOL (Vertical Take-Off and Landing) platform, the amortized landing gear, modeled as spring-damper system, has been added. The resulting model has been implemented in a simulation environment under MATLABs toolbox, SIMULINK. Some numerical results are presented to illustrate response of the open loop system to specific commands.

Performances of Energy-Harvesting Shock Absorbers on Various Types of Vehicles

2015 ◽  
Author(s):  
Sijing Guo ◽  
Lin Xu ◽  
Yilun Liu ◽  
Xuexun Guo ◽  
Lei Zuo
Keyword(s):  
Energy Harvesting ◽  
Vehicle Dynamics ◽  
Degrees Of Freedom ◽  
Large Scale ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Rotational Inertia ◽  
Shock Absorbers ◽  
Regenerative Shock Absorber ◽  
Comprehensive Study

Energy-Harvesting Shock Absorber (EHSA), as a large-scale energy-harvesting mechanism for recovering suspension vibration energy, has been studied for years. A design of the regenerative shock absorber with Mechanical Motion Rectifier (MMR) has been proved to be more reliable and efficient. This paper reports a comprehensive study of the influence of MMR-based Energy-Harvesting Shock Absorber (MMR-EHSA) on vehicle dynamics performances. Models of MMR-EHSA and vehicle with MMR-EHSA with two degrees of freedom are created. Simulations are conducted on five typical vehicles, including passenger car, bus and three types of trucks. The ride characteristics of comfort, road handling and energy recovery are evaluated on these vehicles under various MMR rotational inertia and harvesting damping. The simulation results show that MMR-EHSA is able to improve both the ride comfort and road handling simultaneously under certain conditions over the traditional shock absorbers, which broadens our knowledge of MMR-EHSA’s applicable scenarios.

Design of an Electromagnetic Shock Absorber

2007 ◽  
Author(s):  
Babak Ebrahimi ◽  
Mir Behrad Khamesee ◽  
M. Farid Golnaraghi
Keyword(s):  
Power Supply ◽  
High Performance ◽  
Shock Absorber ◽  
Magnetic Circuit ◽  
Cost Effective ◽  
Fe Analysis ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
External Power ◽  
Electromagnetic Damper

This paper presents the design, modeling, and Finite Element (FE) analysis of a novel Electromagnetic Damper (ED). This cost-effective, regenerative ED is based on the concept of the tubular, linear, brushless dc motor. The structure of the proposed passive ED is straightforward, and it does not require an external power supply. An analytical model of the system is obtained using the magnetic circuit method and used to optimize the non-dimensional geometry factors and to estimate the electromagnetic forces and flux induced in the system. The model can be used to design high-performance dampers for various applications. To confirm the design, dynamic FE simulations were conducted and compared with the analytical and experimental results.

A Shaker Rig-Based Testing of Perceived Ride Comfort for Various Configurations of Active Suspensions

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Ivan Cvok ◽  
Mario Hrgetić ◽  
Joško Deur ◽  
Davor Hrovat ◽  
H. Eric Tseng
Keyword(s):  
Vehicle Dynamics ◽  
Autonomous Vehicles ◽  
High Performance ◽  
Ride Comfort ◽  
Optimal Controls ◽  
Subjective Measures ◽  
Preview Control ◽  
Active Suspensions ◽  
Driving Experience ◽  
Reading And Writing

Abstract Benefits of introducing active suspension in autonomous vehicles in terms of improving the driver's work/leisure ability can be tested under laboratory conditions using a high-performance shaker rig. In this paper, five different suspension configurations, including passive, semi-active, and fully active suspensions (FAS) and related optimal controls with or without road preview information, are implemented in vehicle dynamics simulator. They are experimentally examined having the driver in the loop to obtain objective and subjective measures of ride comfort and ability to do certain tasks. In total, 44 drivers of various age, gender, and driving experience performed three different tasks while being driven on shaker-rig (reading and writing, drawing, and subjective grading). The examination results show that FAS with road preview control offers highest ride comfort improvement, which can be perceived by the driver and greatly improves his/her ability to text and particularly draw.

Performance Evaluation of Train Suspension Energy Harvesting Shock Absorber on Railway Vehicle Dynamics

2018 ◽  
Author(s):  
Yu Pan ◽  
Sijing Guo ◽  
Ruijin Jiang ◽  
Yong Xu ◽  
Zhiwen Tu ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Vehicle Dynamics ◽  
Shock Absorber ◽  
Ride Comfort ◽  
Average Power ◽  
Modern Society ◽  
Railway Vehicle ◽  
Railway Transportation ◽  
Suspension Dynamics ◽  
Secondary Suspension

Railway transportation has been increasingly significant for modern society in recent decades. To enable smart technology, such as health monitoring and electromagnetic braking for railway vehicles, a mechanical motion rectifier (MMR) based energy harvesting shock absorber (EHSA) has been proposed and proved to be capable of scavenging energy from the train suspension vibration. When installed on the train, MMR-EHSA works as a tunable damper in parallel with an inerter. This new suspension form brings great potential for further optimization of suspension dynamics but is rarely researched before. In this paper, the influence of the energy harvesting shock absorber (EHSA) on the railway vehicle dynamics performance is studied. A ten-degree of freedom vehicle model is established, with MMR shock absorber’s nonlinearity taken into account, with the purpose to analyze the influence of the EHSA on the ride comfort and wheel-rail vertical forces. Simulations are conducted by replacing the traditional shock absorber from train secondary suspension with the EHSA. Results show that EHSA could respectively harvest 180 W and 40 W average power at AAR 6th and 5th rail irregularity. In addition, compared with the traditional shock absorber, the MMR-EHSA can provide a higher ride comfort for passengers and slightly reduce the wheel-rail contact force.

Sign in / Sign up

Export Citation Format

Share Document