Modeling, Simulation and Testing of Automobile Power Steering Systems for the Evaluation of On-center Handling
Author | : James W. Post |
Publisher | : |
Total Pages | : 380 |
Release | : 1995 |
Genre | : Motor vehicles |
ISBN | : 9780591098617 |
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Author | : James W. Post |
Publisher | : |
Total Pages | : 380 |
Release | : 1995 |
Genre | : Motor vehicles |
ISBN | : 9780591098617 |
Author | : Manfred Harrer |
Publisher | : Springer |
Total Pages | : 569 |
Release | : 2016-06-24 |
Genre | : Technology & Engineering |
ISBN | : 331905449X |
This edited volume presents basic principles as well as advanced concepts of the computational modeling of steering systems. Moreover, the book includes the components and functionalities of modern steering system, which are presented comprehensively and in a practical way. The book is written by more than 15 leading experts from the automotive industry and its components suppliers. The target audience primarily comprises practicing engineers, developers, researchers as well as graduate students who want to specialize in this field.
Author | : Aman Behal |
Publisher | : CRC Press |
Total Pages | : 392 |
Release | : 2009-12-17 |
Genre | : Computers |
ISBN | : 1000654435 |
Lyapunov-Based Control of Robotic Systems describes nonlinear control design solutions for problems that arise from robots required to interact with and manipulate their environments. Since most practical scenarios require the design of nonlinear controllers to work around uncertainty and measurement-related issues, the authors use Lyapunov's direc
Author | : Alessandro Dell'Amico |
Publisher | : Linköping University Electronic Press |
Total Pages | : 209 |
Release | : 2016-02-04 |
Genre | : |
ISBN | : 9176858383 |
This thesis deals with the Electrohydraulic Power Steering system for road vehicles, using electronic pressure control valves. With an ever increasing demand for safer vehicles and fewer traffic accidents, steering-related active safety functions are becoming more common in modern vehicles. Future road vehicles will also evolve towards autonomous vehicles, with several safety, environmental and financial benefits. A key component in realising such solutions is active steering. The power steering system was initially developed to ease the driver's workload by assisting in turning the wheels. This is traditionally done through a passive open-centre hydraulic system and heavy trucks must still rely on fluid power, due to the heavy work forces. Since the purpose of the original system is to control the assistive pressure, one way would be to use proportional pressure control valves. Since these are electronically controlled, active steering is possible and with closed-centre, energy efficiency can be significantly improved on. In this work, such a system is analysed in detail with the purpose of investigating the possible use of the system for Boost curve control and position control for autonomous driving. Commercially available valves are investigated since they provide an attractive solution. A model-based approach is adopted, where simulation of the system is an important tool. Another important tool is hardware-in-the-loop simulation. A test rig of an electrohydraulic power steering system, is developed. This work has shown how proportional pressure control valves can be used for Boost curve control and position control and what implications this has on a system level. As it turns out, the valves add a great deal of time lag and with the high gain from the Boost curve, this creates a control challenge. The problem can be handled by tuning the Boost gain, pressure response and damping and has been effectively shown through simulation and experiments. For position control, there is greater freedom to design the controller to fit the system. The pressure response can be made fast enough for this case and the time lag is much less critical.
Author | : Society of Automotive Engineers |
Publisher | : |
Total Pages | : 400 |
Release | : 2000 |
Genre | : Technical literature |
ISBN | : |
Author | : Alexander Hitti |
Publisher | : |
Total Pages | : |
Release | : 2016 |
Genre | : |
ISBN | : 9781339825236 |
The electric power steering system has drastically impacted the concept of steering feel. In a Column Motor Driven Power Steering (C-MDPS) system, the assist motor is mounted directly to the steering column. This assist motor applies a torque onto the steering column to provide a desired torque, hence indirectly impacting the steering torque feedback or feel. A bond graph model of this C-MDPS system is developed and connected to a full vehicle bicycle car model. The resulting state equations from this model are implemented into MatLab/Simulink for simulation. Higher order friction models are used in the worm gear, the steering rack, and the vehicle tires to increase fidelity. The sensitivity of the system to key parameters and frictions is studied through varying these parametric elements by percentages of their nominal value and observing the effect on system outputs such as Yaw Rate Gain and Parking Effort. The system performance is validated based on objective data. A test stand setup is used to study the characteristics of the torque on the steering column and the worm gear friction. The full vehicle model is compared to data from a test vehicle.