scholarly journals Differential equation approximation and enhancing control method for finding the PID gain of a quarter-car suspension model with state-dependent ODE

2020 ◽  
Vol 16 (5) ◽  
pp. 2305-2330
Author(s):  
H. W. J. Lee ◽  
◽  
Y. C. E. Lee ◽  
Kar Hung Wong ◽  
Keyword(s):  
Differential Equation ◽  
Control Method ◽  
State Dependent ◽  
Car Suspension ◽  
Quarter Car ◽  
Suspension Model

Adaptive fault-tolerant control for active suspension systems based on the terminal sliding mode approach

2019 ◽  
Vol 234 (2) ◽  
pp. 501-511
Author(s):  
Amirhossein Kazemipour ◽  
Alireza B Novinzadeh
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Fault Tolerant Control ◽  
Active Suspension ◽  
Suspension System ◽  
Terminal Sliding Mode ◽  
Car Suspension ◽  
Suspension Model

In this paper, a control system is designed for a vehicle active suspension system. In particular, a novel terminal sliding-mode-based fault-tolerant control strategy is presented for the control problem of a nonlinear quarter-car suspension model in the presence of model uncertainties, unknown external disturbances, and actuator failures. The adaptation algorithms are introduced to obviate the need for prior information of the bounds of faults in actuators and uncertainties in the model of the active suspension system. The finite-time convergence of the closed-loop system trajectories is proved by Lyapunov's stability theorem under the suggested control method. Finally, detailed simulations are presented to demonstrate the efficacy and implementation of the developed control strategy.

A quarter-car suspension model for dynamic evaluations of an in-wheel electric vehicle

2017 ◽  
Vol 232 (9) ◽  
pp. 1139-1148 ◽  
Author(s):  
Ambarish Kulkarni ◽  
Sagheer A Ranjha ◽  
Ajay Kapoor
Keyword(s):  
Ride Comfort ◽  
Combustion Engine ◽  
Permanent Magnet Motor ◽  
Plot Analysis ◽  
Car Suspension ◽  
Switch Reluctance Motor ◽  
Suspension Dynamics ◽  
Quarter Car ◽  
Derived Design ◽  
Suspension Model

Electric vehicles (EVs) are an alternative architecture in the automotive industry that provide reduced emissions. This research has developed a switch reluctance motor (SRM) in-wheel drivetrain for an EV. SRM drivetrains are cheaper and do not use rare earth elements unlike a permanent magnet motor (PMM). Conversely, the in-wheel SRM has a drawback of an increased mass on the suspension when compared with an equivalent power output PMM drivetrain. This situation results in an increased mass at the wheels; hence, a suspension analysis is required. This paper discusses the suspension dynamics evaluated using a quarter-car simulation of an in-wheel SRM EV and compares it to the internal combustion engine (ICE) vehicle. The simulation used step loads derived design scenarios, namely (1) sprung, (2) unsprung and (3) driver’s seat. Further Bode plot analysis techniques were used to determine the ride comfort range for the developed EV.

Study of a Half Car Suspension Model

2013 ◽  
Vol 430 ◽  
pp. 191-194
Author(s):  
Ramona Nagy ◽  
Karoly Menyhardt
Keyword(s):  
Differential Equations ◽  
Degrees Of Freedom ◽  
Analytical Study ◽  
Control Method ◽  
Car Model ◽  
Car Suspension ◽  
Suspension Model ◽  
Passenger Discomfort

In this paper, a model with four degrees of freedom is studied to assess the discomfort of car passengers due to vibrations. The response of the half car model due to road irregularities is presented in order to attain a control method for the dampers. For the analytical study, the differential equations of the motion were written in order to determine the critical frequencies. The resulted model takes into account both the forced and damped solution for a numerical case, thus giving a more detailed overview of the phenomena. Using this numerical case, a control method can be developed to reduce the passenger discomfort, based on the motion diagrams.

Comparison of Skyhook and h∞ Control Applied on a Quarter-Car Suspension Model

2001 ◽  
Vol 34 (1) ◽  
pp. 107-112 ◽  
Author(s):  
D. Sanunier ◽  
O. Sename ◽  
L. Dugard
Keyword(s):  
Car Suspension ◽  
Quarter Car ◽  
Suspension Model

Optimization of a quarter-car suspension model coupled with the driver biomechanical effects

2011 ◽  
Vol 330 (12) ◽  
pp. 2937-2946 ◽  
Author(s):  
Alexey Kuznetsov ◽  
Musa Mammadov ◽  
Ibrahim Sultan ◽  
Eldar Hajilarov
Keyword(s):  
Car Suspension ◽  
Quarter Car ◽  
Suspension Model

Quarter Car Suspension Model with Provision for Loss of Contact with the Road

2018 ◽  
pp. 167-208
Author(s):  
Ali Khazaie ◽  
Najiullah Hussaini ◽  
Hormoz Marzbani ◽  
Reza N. Jazar
Keyword(s):  
The Road ◽  
Car Suspension ◽  
Loss Of Contact ◽  
Quarter Car ◽  
Suspension Model

Comparison of Air Spring Actuator and Electro-Hydraulic Actuator in Automotive Suspension System

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
J. Jancirani ◽  
P. Sathishkumar ◽  
Manar Eltantawie ◽  
Dennie John
Keyword(s):  
Fuzzy Logic Controller ◽  
Suspension System ◽  
Vehicle Body ◽  
Hydraulic Actuator ◽  
Air Spring ◽  
Quarter Car Model ◽  
Car Suspension ◽  
Quarter Car ◽  
Automotive Suspension ◽  
Suspension Model

The present article introduces an approach that combines modelling and simulation of air spring actuator and electro-hydraulic actuator for comparison in automotive suspension system. Both hydraulic and air spring actuators are controlling the vehicle body by developing a desired force between sprung mass and unsprung mass using fuzzy logic controller. The vehicle body along with the wheel system is modelled as a two degree of freedom quarter car model. The actuator performance is investigated using the quarter car suspension model under single road bump with severe peak amplitude excitations and random road input. From the results of simulation, it can be concluded that air spring actuator gave better performance than electro-hydraulic actuator in all conditions under vertical body deflection.

scholarly journals Development of a Refined Quarter Car Model for the Analysis of Discomfort due to Vibration

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
A. N. Thite
Keyword(s):  
Performance Optimization ◽  
Natural Frequencies ◽  
Equations Of Motion ◽  
State Space Model ◽  
Damping Coefficient ◽  
Model Complexity ◽  
Unique Contribution ◽  
Car Suspension ◽  
Quarter Car ◽  
Suspension Model

In the automotive industry, numerous expensive and time-consuming trials are used to “optimize” the ride and handling performance. Ideally, a reliable virtual prototype is a solution. The practical usage of a model is linked and restricted by the model complexity and reliability. The object of this study is development and analysis of a refined quarter car suspension model, which includes the effect of series stiffness, to estimate the response at higher frequencies; resulting Maxwell's model representation does not allow straightforward calculation of performance parameters. Governing equations of motion are manipulated to calculate the effective stiffness and damping values. State space model is arranged in a novel form to find eigenvalues, which is a unique contribution. Analysis shows the influence of suspension damping and series stiffness on natural frequencies and regions of reduced vibration response. Increase in the suspension damping coefficient beyond optimum values was found to reduce the modal damping and increase the natural frequencies. Instead of carrying out trial simulations during performance optimization for human comfort, an expression is developed for corresponding suspension damping coefficient. The analysis clearly shows the influence of the series stiffness on suspension dynamics and necessity to incorporate the model in performance predictions.

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