Author: Wendell Smith Norman
Publisher:
ISBN:
Category :
Languages : en
Pages : 194

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Author: Alessandro Dell'Amico
Publisher: Linköping University Electronic Press
ISBN: 9176858383
Category :
Languages : en
Pages : 209

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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: Cornell Aeronautical Laboratory. Vehicle Research Department
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 626

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Author: L. Segel
Publisher:
ISBN:
Category :
Languages : en
Pages : 13

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Author: A. F. Grandt Jr.
Publisher: Purdue University Press
ISBN: 1557539146
Category : Technology & Engineering
Languages : en
Pages : 500

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Book Description
Purdue University has played a leading role in providing the engineers who designed, built, tested, and flew the many aircraft and spacecraft that so changed human progress during the 20th century. It is estimated that Purdue has awarded 6% of all BS degrees in aerospace engineering, and 7% of all PhDs in the United States during the past 65 years. The University's alumni have led significant advances in research and development of aerospace technology, have headed major aerospace corporations and government agencies, and have established an amazing record for exploration of space. More than one third of all US manned space flights have had at least one crew member who was a Purdue engineering graduate (including the first and last men to step foot on the moon). The School of Aeronautics & Astronautics was founded as a separate school within the College of Engineering at Purdue University in 1945. The first edition of this book was published in 1995, at the time of the school's 50th anniversary. This corrected and expanded second edition brings the school's illustrious history up to date, and looks to Purdue's future in the sky and in space.

Author: Gus Wright
Publisher: Jones & Bartlett Learning
ISBN: 1284150933
Category : Transportation
Languages : en
Pages : 1929

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"Thoroughly updated and expanded, 'Fundamentals of Medium/Heavy Duty Commercial Vehicle Systems, Second Edition' offers comprehensive coverage of basic concepts building up to advanced instruction on the latest technology, including distributed electronic control systems, energy-saving technologies, and automated driver-assistance systems. Now organized by outcome-based objectives to improve instructional clarity and adaptability and presented in a more readable format, all content seamlessly aligns with the latest ASE Medium-Heavy Truck Program requirements for MTST." --Back cover.

Author: Purdue University. Engineering Experiment Station
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 668

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Author: Marcus Rösth
Publisher:
ISBN: 9789185643004
Category :
Languages : en
Pages : 234

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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 918

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Author: Phillip Lee McInroe
Publisher:
ISBN:
Category :
Languages : en
Pages : 448

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