Masters Theses
Abstract
Hydraulic actuators are used with accuracy and dependability in equipment for moving loads. Automation in this equipment is very essential to ensure a safe and accurate operation. Automation can require sensing of the movements of linkages attached to the hydraulic cylinders. This sensing can be accomplished by directly sensing the stroke of the piston in the hydraulic cylinder.
In this thesis a method for sensing the stroke of the piston in a hydraulic cylinder is examined. An analysis of the cylinder piston system is required to understand the dynamics inside the system. A mathematical model is derived that describes the dynamics of this system. Using EASY5 software the piston cylinder system is simulated and the results are analyzed to study the feasibility of the method. Experiments were performed to prove that this method works for measuring the stroke of pistons in hydraulic cylinders. The experiments gave satisfactory results.
Pressure oscillations at each position of the piston are measured. The pressure signals output is processed using a Fast Fourier Transform (FFT) to detect the natural frequencies of the system. The position of the piston and hence its stroke is measured using the natural frequency of pressure oscillations as the position of the piston is directly related to the natural frequency
Advisor(s)
Flanigan, V. J.
Committee Member(s)
Drallmeier, J. A.
Fu, Yongjian
Department(s)
Mechanical and Aerospace Engineering
Degree Name
M.S. in Mechanical Engineering
Publisher
University of Missouri--Rolla
Publication Date
Fall 2000
Pagination
ix, 56 pages
Note about bibliography
Includes bibliographical references (page 55).
Rights
© 2000 Mukund Nemali, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Thesis Number
T 7810
Print OCLC #
45687491
Recommended Citation
Nemali, Mukund, "A new method of sensing the stroke of pistons in hydraulic cylinders" (2000). Masters Theses. 4405.
https://scholarsmine.mst.edu/masters_theses/4405
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