Vehicle Ride Comfort and Stability Performance Evaluation

2009 ◽  
Author(s):  
Shawky Hegazy ◽  
Corina Sandu
Keyword(s):  
Performance Evaluation ◽  
Ride Comfort ◽  
Stability Performance

Ride Comfort Performance Improvement of Electric Vehicle (EV) Conversion Using SAS-Controlled Active Suspension System

2014 ◽  
Vol 71 (2) ◽  
Author(s):  
Saiful Anuar Abu Bakar ◽  
Ryosuke Masuda ◽  
Hiromu Hashimoto ◽  
Takeshi Inaba ◽  
Hishamuddin Jamaluddin ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Mathematical Modelling ◽  
Electric Vehicle ◽  
Performance Improvement ◽  
Pitch Angle ◽  
Degrees Of Freedom ◽  
Ride Comfort ◽  
Active Suspension ◽  
Vertical Displacement ◽  
Suspension System

This paper presents vehicle’s ride comfort performance evaluation after the conversion into an electric vehicle (EV) and the possible ride comfort improvement by an active suspension system have been investigated. The evaluations were done using a validated 7 degrees of freedom of vehicle’s ride model. The mathematical modelling of the vehicle’s ride as well as its validations was developed in order to predict the vehicle’s ride behaviours. The model was then integrated with the active suspension system in order to improve the EV conversion’s ride comfort performance. It was found that the modifications towards an EV conversion do not affect vehicle’s ride comfort performance significantly, except it changes only the vehicle’s vertical displacement, pitch rate and pitch angle responses. However, further application of an active suspension system in EV conversion was found to be able to improve all of the observed responses for ride comfort performance of an EV conversion by overall improvement of 71.1 percent.

scholarly journals REEF RUNWAY WAVE PROTECTIVE STRUCTURE, HONOLULU INTERNATIONAL AIRPORT, OAHU, HAWAII, STABILITY PERFORMANCE EVALUATION

1984 ◽  
Vol 1 (19) ◽  
pp. 181
Author(s):  
Robert S. Chun ◽  
Edward K. Noda ◽  
Elaine E. Tamaye
Keyword(s):  
Performance Evaluation ◽  
Protective Structure ◽  
International Airport ◽  
Stability Performance ◽  
Wave Conditions

An inspection survey of the Reef Runway Wave Protective Structure at the Honolulu International Airport was accomplished in 1982 to access the performance of the dolos and rock armored structure to date. The inspection showed the structure to be performing adequately considering that the design wave conditions were experienced.

Research on Calculation Method of the Target Parameters of K&C Test-Rig

2013 ◽  
Vol 461 ◽  
pp. 972-976
Author(s):  
Li Hao Zhang ◽  
Kong Hui Guo ◽  
Fei Xiang Zhao ◽  
Shu Qin Chen
Keyword(s):  
Calculation Method ◽  
Ride Comfort ◽  
Transformation Matrix ◽  
System Structure ◽  
Test Rig ◽  
Stability Performance ◽  
Body Dynamics ◽  
Rotation Transformation ◽  
Toe Angle ◽  
Multi Body

The suspension kinematics and compliance (hereafter referred to as 'K & C') characteristics as the important system assembly characteristics have a direct effect on the vehicle handling and stability performance and the ride comfort performance. The suspension K&C test rig is an key equipment to obtain the suspension K&C characteristics. Calculation method of the target parameters of K&C test-rig is studied. The movement law of the suspension K & C test rig is analyzed by useing the multi-body dynamics theory. Application Space rotation transformation matrix based on the measurement system structure is applied to solve the coordinates of the wheel center. Using the space vector operations and the definition of the toe angle and the camber angle, the solution method of the camber and toe angle is derived. The parralel wheel travel analysis using the multi-body dynamics model of the K&C test rig is taken. The simulation results when the rebound travel is-100mm is used to calculate the target parameters and verify the accuracy of the calculation method.Keywords-K&C test; calculation method; multi-body dynamics; rotation transformation matrix;

scholarly journals Nonlinear Predictive Sliding Mode Control for Active Suspension System

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Dazhuang Wang ◽  
Dingxuan Zhao ◽  
Mingde Gong ◽  
Bin Yang
Keyword(s):  
Sliding Mode Control ◽  
Ride Comfort ◽  
Sliding Mode ◽  
Approximation Error ◽  
Nonlinear Effects ◽  
Active Suspension ◽  
Adaptive Controller ◽  
Suspension System ◽  
Mode Control ◽  
Stability Performance

An active suspension system is important in meeting the requirements of the ride comfort and handling stability for vehicles. In this work, a nonlinear model of active suspension system and a corresponding nonlinear robust predictive sliding mode control are established for the control problem of active suspension. Firstly, a seven-degree-of-freedom active suspension model is established considering the nonlinear effects of springs and dampers; and secondly, the dynamic model is expanded in the time domain, and the corresponding predictive sliding mode control is established. The uncertainties in the controller are approximated by the fuzzy logic system, and the adaptive controller reduces the approximation error to increase the robustness of the control system. Finally, the simulation results show that the ride comfort and handling stability performance of the active suspension system is better than that of the passive suspension system and the Skyhook active suspension. Thus, the system can obviously improve the shock absorption performance of vehicles.

Fine Particle Mass Monitoring with Low-Cost Sensors: Corrections and Long-Term Performance Evaluation

2019 ◽  
Author(s):  
Carl Malings ◽  
Rebecca Tanzer ◽  
Aliaksei Hauryliuk ◽  
Provat K. Saha ◽  
Allen L. Robinson ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fine Particle ◽  
Low Cost ◽  
Particle Mass ◽  
Long Term Performance ◽  
Term Performance
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