The paper presents a new type of current-to-pressure transducer that consis
ts of a ferromagnetic nozzle and an electromagnetic actuator with two diaph
ragms and a magnetic fluid, which ensures a correspondence between the air
line pressure and the control current in the coil. The experimental results
obtained in stationary steady-state show that by a suitable choice of the
technical parameters, transfer characteristics with low hysteresis effect m
ay be obtained, the dependence pressure versus current being practically li
near. (C) 2001 Elsevier Science B.V. All rights reserved.