公开(公告)号：US20190031321A1

公开(公告)日：2019-01-31

申请号：US16038328

申请日：2018-07-18

Applicant: ROLLS-ROYCE plc

Inventor： Pawel CHMIELARCZYK ,  Richard A. YOUNG ,  Marko BACIC

IPC: B64C21/02 ,  F15B21/12 ,  F15C1/22 ,  F15C1/00

Abstract: A fluidic device for providing analogue output control includes a main channel, a first control channel, a second control channel, a comparator which receives respective input fluid flows from the main, the first and the second control channels. The first control channel is configured such that the input fluid flow therefrom carries an oscillating pressure wave signal, the second control channel includes a flow regulator controllable to vary the mass flow rate of the input fluid flow from the second control channel, and the main channel is configured such that the input fluid flow therefrom is at a reference mass flow rate. The comparator is configured such that the input fluid flows from the first control and the second control channels act in combination on the input fluid flow from the main channel to produce an output fluid flow from the comparator having a PWM mass flow rate characteristic.