Active vibration reduction operator’s seat with the use of controlled single-acting pneumatic actuator

• Autorzy: Chwastek S.

Identyfikatory

DOI

10.5604/12314005.1165950

• Języki publikacji: EN

Abstrakty

EN

Mobile heavy machines produce vibrations with low natural frequencies. Because they tend to ride at low speeds, excitations due to road roughness excite low frequency vibrations, which can be reduced by active or semi active methods only. Under conditions of low frequency vibrations, energy dissipation in tires will reduce the vibration intensity in a minor degree only. In the unsprung mobile machine vibration isolation system are provided between a vibration source and the protected object (operator) along the path of vibration propagation. Most machines are now equipped with controlled suspension seats. In the case of active suspensions, the external energy source is required, for instance in the form of compressed air. The compressed air has the advantage that it is generally available in heavy machines as the working fluid and is environmentally friendly. Simulation tests were carried out both in the time domain in Matlab-Simulink and in the frequency domain in the program Mathcad. Simulation tests were performed to investigate effectiveness and stability of the proposed solution and the results were deemed satisfactory. The system was found to be feasible and implementable with respect to every parameter. The first purpose of this study is to develop a simulation model of the active suspension of operator's seat based on an adjustable pneumatic actuator. The other purpose of this study is to examine the effectiveness of different control strategies.

Słowa kluczowe

EN

mobile heavy machines; unsprung vehicles; active reduction of vibration; controlled suspension seats; pneumatic actuator

• 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: 2015
• Tom: Vol. 22, No. 3
• Strony: 13--19
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Chwastek S.

• Krakow University of Technology, Institute of Machine Design Jana Pawła II Avenue 37, 31-864 Krakow, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Kamiński, Z., Modelowanie nieliniowości i nieciągłości w pneumatycznych siłownikach tłokowych, Hydraulika i Pneumatyka Nr 2, 2006.
• [2] Kościelny, W., Hamowanie siłowników pneumatycznych, Hydraulika i Pneumatyka, 4, 2004.
• [3] Flis, K., Pobędza, J., Simulation of pneumatic motor used in pneumobile, Journal of KONES Powertrain and Transport, Vol. 21, No. 3, 2014.
• [4] Michałowski, S., Redukowanie wibracji w maszynach roboczych ciężkich, Wydawnictwo PiT, Krakow 2001.
• [5] Chwastek, S., Modulation effect of vibration frequency of an unsprung heavy machine under the variable road adhesion conditions, Journal of KONES Powertrain and Transport, Vol. 20, No. 4, 2013.
• [6] Książek, M., Modelowanie i optymalizacja układu człowiek-wibroizolator-maszyna, Seria Mechanika, Wydawnictwo PK, Monografia 244, Krakow 1999.
• [7] Freitag, E., Einfluß von Dichtung und Dichtungswerkstoff auf dem Reibungsverhalten von Pneumatikzylindern, Ölhydraulik und Pneumatik, 7 (38), 1994.