BS ISO 10767-3:1999 PDF

1   Scope This part of ISO 10767 specifies a procedure for the determination of a rating of the source flow ripple , source impedance and pressure ripple levels generated by positive-displacement hydraulic motors, including bi-directional motors. Ratings are obtained as the following:

a) the source flow ripple amplitude, in cubic metres per second, over ten individual harmonics of motoring frequency ;

b) the source impedance amplitude, in newton seconds per metre to the power of five [(N·s)/m 5 ], and phase, in degrees, over ten individual harmonics of motoring frequency ;

c) the anechoic pressure ripple amplitude, in pascals, over ten harmonics of motoring frequency ;

d) the overall root mean square (r.m.s.) anechoic pressure ripple , in pascals;

e) the blocked acoustic pressure ripple amplitude, in pascals, over ten harmonics of motoring frequency ;

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