Active front steering for passenger vehicle using fuzzy PID method
This master project report for this final year project is about improving handling behaviour of passenger car by using active front steering. Active Front Steering (AFS) is a newly developed technology for passenger cars. It provides an electronically controlled superposition of an angle to the h...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/20448/1/Active%20front%20steering%20for%20passenger%20vehicle%20using%20fuzzy%20PID%20method.pdf http://eprints.utem.edu.my/id/eprint/20448/2/Active%20front%20steering%20for%20passenger%20vehicle%20using%20fuzzy%20PID%20method.pdf http://eprints.utem.edu.my/id/eprint/20448/ https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=105209 |
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| Summary: | This master project report for this final year project is about improving handling behaviour
of passenger car by using active front steering. Active Front Steering (AFS) is a newly
developed technology for passenger cars. It provides an electronically controlled
superposition of an angle to the hand steering wheel angle that is prescribed by the driver.
This additional degree of freedom enables a continuous and driving-situation dependent
adaptation of the steering characteristics. At the heart of the new Active Steering system is
the planetary gear set integrated into the steering column. An electric motor in the joint
adjusts the front wheels' steering angle in proportion to the vehicle current speed. This
active steering is evaluated by simulating different steering inputs. The active steering
solution must be implemented in Matlab/Simulink. A vehicle model is also implemented in
Matlab/Simulink. This master project fo cuses on comparison on both two systems: a
conventional vehicle for passenger vehicle and a controlled ve~cle. Simulation is made for
a constant speed and a specific changeable road adhesion coefficient. The motivation for
this work is to understand and characterize the response of a vehicle with a complementary
steering system. Improved stability is obtained for the passenger vehicle due to side wind
disturbances or slippery road driving. A passenger vehicle tends to lose its dynamic
mobility when cruising on the roads that have side wind disturbances. This is due to the
effect of the side wind force that reacts at the center of the vehicle body, which creates an
unwanted yaw moment at the vehicle's center of gravity. In order to enhance the mobility
performance of the passenger vehicle, a control strategy, i.e. yaw rejection control, is
designed and test on a passenger vehicle model. The purpose of the control strategy is to
maintain the directional mobility of the passenger vehicle by providing a steering
correction angle to the pitman arm steering system. The control strategy proposed in this
study consists of two main structures: yaw rate feedback control using a ProportionalIntegral-
Derivative (PID) controller using an adaptive Fuzzy-Proportional-IntegralDerivative
(Fuzzy-PID) controller. The simulation results in terms of yaw and lateral
motions were observed, and the proposed control strategy was shown to successfully
improve the directional mobility of the passenger vehicle after cruising on the side wind
road. The benefit of the proposed control strategy with Fuzzy-PID control is evaluated by
comparing its performance to PID and Fuzzy-PID control strategies. Vehicle dynamic
controls will continue to deliver safer, more pleasing products to consumers at greater
value. |
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