FIELD: mechanical vibration exciters. SUBSTANCE: vibrator has case 1 and armature 2. Case 1 houses electrodes 3, 4; its interior is filled with electrorheological fluid 5. Passing current through electrorheological fluid increases its volume and raises armature 2; reducing current passed through this fluid decreases its volume, and armature goes down. EFFECT: improved speed. 1 dwg
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