Modelling of eps type steering systems including freeplay and friction in steering mechanism

• Autorzy: Żardecki D.
• Języki publikacji: EN

Abstrakty

EN

Electric power steering (EPS) systems are important ingredients of modern cars. Basing on mechanic (steering mechanism), electric (electric motor), electronic (controller) and mechatronic (sensors) components, they are typical servo mechanic devices, which support drivers handling action. The paper presents mathematical modelling of EPS systems treated as multi body mechanisms with power assistance, including strong non-linear phenomena caused by a friction (especially in king-pins) and a feeplay (in gear-box). Mathematical model consists of several variable structure ordinary differential equations with piecewise linear characteristics. Model non-linearities are described with using special piecewise linear luz (…) and tar(...) projections. These projections and their original mathematical apparatus facilitate synthesis and analysis of the model. The model equations are derived from constitutive equations and control rules. This method can be also applied for synthesis of other non-linear multi-body electromechanical systems. The elaborated models of EPS systems have the forms ready to use in simulation programs. Some examples of simulation studies of the open car tests due to sensitivity analysis of steering system model are also presented in the paper.

Słowa kluczowe

EN

EPS system; freeplay; friction; piecewise linear model; simulation studies of car open tests

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 1
• Strony: 689--696
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Żardecki D.

• Military University of Technology, Faculty of Mechanical Engineering Institute of Motor Vehicles and Transportation Gen. S. Kaliskiego Street 2, 00-908 Warsaw, Poland tel.[phone], fax. [phone],

Bibliografia

• [1] Lozia, Z., Więckowski, D., Żardecki, D., Wpływ luzu i tarcia w układzie kierowniczym na kierowalność samochodu, Zeszyty Naukowe Politechniki Świętokrzyskiej, Nauki Techniczne– Budowa i Eksploatacja Maszyn, pp.89-120, 2008.
• [2] Lozia, Z., Zardecki, D., Dynamics of Steering System with Freeplay and Dry Friction – Comparative Simulation Investigation for 2WS and 4WS Vehicles, SAE Paper 2005-01-1261, 2005.
• [3] Żardecki, D., Analiza wrażliwości strukturalnej modelu matematycznego układu kierowniczego z luzem i tarciem. Teka Komisji Naukowo-Problemowej Motoryzacji PAN – Oddział w Krakowie, nr 21, pp. 73-82, 2000.
• [4] Żardecki, D., Piecewise Linear luz(...) and tar(...) Projections. Part 1 – Theoretical Background. Journal of Theoretical and Applied Mechanics, Vol.44, No.1, pp.163-184, 2006.
• [5] Żardecki, D., Piecewise Linear luz(...) and tar(...) Projections. Part 2 – Application in Modelling of Dynamic Systems with Freeplay and Friction. Journal of Theoretical and Applied Mechanics, Vol.44, No.1, pp. 185-202, 2006.
• [6] Żardecki, D., Modelowanie luzu i tarcia oparte na odwzorowaniach luz(…) i tar(…) – podstawy teoretyczne i zastosowanie w symulacji drgań nieliniowych w układach kierowniczych samochodów. (Rozprawa habilitacyjna) Wyd. WAT, Warszawa 2007.
• [7] Żardecki, D., Sensitivity analysis of steering system model. Journal of KONES Powertrain and Transport, Vol.16, No.1, pp..571-581, 2009.
• [8] http://www.autoshop101.com/forms/Hybrid17.pdf.