Off-line displacement error correction method for servo-hydraulic testers

• Autorzy: Braska D. , Huchla M. , Czop P. , Wszołek G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper presents an approach towards improving the test rig performance in reproduction of random excitation to which a prototype hydraulic damper is subjected. The method is intended to be implemented as a software solution without modifications either in hardware or the settings of the servo-hydraulic tester. These are the conditions of fatigue tests when a specific signal sequence (block) is repeated until failure of the sample. Design/methodology/approach: Experimental validation of the proposed correction method was conducted using a servo-hydraulic test rig and a transfer function inverse model which was identified based on the operational data. Findings: The proposed method, both in the frequency and time domain, improves the tracking of the test signal and allows an accuracy of more than 95% to be gained using the best fit measure in the case of reproduction of coloured noise signals. Research limitations/implications: It is possible to consider more advanced model-based methods for performing off-line error correction, e.g. state-space models. Practical implications: The proposed method was validated and implemented in the LabVIEW® software to automatically perform the correction of the test signal before the test. The method was validated for the test rig with and without the tested object. Originality/value: The paper proposes an off-line control strategy that improves the reproduction of the load signal in case of repeatable test sequences achieving more than 99% agreement between the applied and measured load.

Słowa kluczowe

EN

off-line error cancellation; signal profile correction; hydraulic actuator performance

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 431--438
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Braska D.

• Institute of Engineering Processes Automation and Integrated Manufacturing Systems, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Huchla M.

• Institute of Engineering Processes Automation and Integrated Manufacturing Systems, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Czop P.

• AGH University of Science and Technology, Cracow, Poland

autor

Wszołek G.

• Institute of Engineering Processes Automation and Integrated Manufacturing Systems, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

• [1] J. De Cuyper, H. De Keersmaecker, J. Swevers, D. Coppens, Design of a multivariable feedback control system to drive durability test rigs in the automotive industry, Proceedings of the 5th European Control Conference, Karslruhe, Germany, 1999.
• [2] J. De Cuyper, J. Swevers, M. Verhaegen, P. Sas, HN Feedback control for signal tracking on a 4 poster in the automotive industry, Proceedings of the International Seminar On Modal Analysis, Leuven, Belgium, 2000, 61-68.
• [3] E. Switonski, A. Mezyk, S. Duda, S. Kciuk, Prototype magnetorheological fluid damper for active vibration control system, Journal of Achievements in Materials and Manufacturing Engineering 21/1 (2007) 71-74.
• [4] T. Dzitkowski, A. Dymarek, Design and examining sensitivity of machine driving systems with required frequency spectrum, Journal of Achievements in Materials and Manufacturing Engineering 26/1 (2008) 49-56.
• [5] J. De Cuyper, D. Coppens, C. Liefooghe, J. Swevers, M. Verhaegen, Advanced drive file development methods for improved service load simulation on multi axial durability test rigs, Proceedings of the International Acoustics And Vibration Asia Conference, Singapore, 1998, 339-354.
• [6] K. Smolders, M. Volckaert, J. Swevers J, Tracking control of nonlinear lumped mechanical continuous-time systems, A model-based iterative learning approach, Mechanical Systems and Signal Processing 22 (2008) 1896-1916.
• [7] D. Braska, P. Czop, D. Sławik, G. Wszołek, Application of off-line error correction method software to reproduce random signals on servo-hydraulic testers, Journal of Achievements on Materials and Manufacturing Engineering 40/1 (2010) 41-45.
• [8] J. Świder, P. Michalski, G. Wszołek, Physical and geometrical data acquiring system for vibration analysis software, Journal of Materials Processing Technology 164-165 (2005) 1444-1451.
• [9] Instron Structural Testing Systems - Reference Manual M32-13770-EN.
• [10] G. Schothorst, Modeling of Long-Stroke Hydraulic Servo-System for Flight Simulator Motion Control and System Design, PD Thesis, Technical University of Delft, 1997.
• [11] K. Bialas, Reverse task of passive and active mechanical systems, Journal of Achievements in Materials and Manufacturing Engineering 23/2 (2007) 51-54.
• [12] K. Bialas, Synthesis of mechanical systems including passive or active elements, Journal of Achievements in Materials and Manufacturing Engineering 26/1 (2008) 323-326.
• [13] MATHWORKS Inc., Matlab System Identification Toolbox Guide, Natick, MA: The Mathowrks Inc, 2007.
• [14] D.H. Owens, S. Daley, Iterative Learning Control -monoticity and optimization, Sheffield, Department of Automatic Control and Systems Engineering University of Sheffield, 2008.
• [15] MTS Systems Corporation, Model 407 Controller Product Information Version 5.0.0, 1997.