34. Analysis of the Impact of Vibrations on a Micro-Hydraulic Valve by Sequence Graph Method

The paper defines areas where a working machine or device may be a source of external forces on the control elements of hydraulic valves. The influence of external mechanical vibrations carries a number of unfavorable and undesirable effects on the operation of hydraulic valves. During the experimental tests, the valve was affected by external mechanical vibrations of known amplitude and frequency. The test stand of the hydraulic measuring system is described. Exemplary amplitude-frequency characteristics for selected parameters are presented. The work describes the application of the sequential graph method to analyze the impact of vibrations on a micro-hydraulic valve. The procedures for determining the sequence of the importance of parameters in relation to the graphs used were defined. The analysis of iterative systems, i.e., those that contain a certain set of interval chains with the same basic cell (interval) but with a different rank of importance, is an important tool for the diagnostic analysis of systems built on functions. This will eventually allow multi-valued decision trees to be used for analysis in the intervals concerned.