Research on a hydraulic displacement amplifier for a piezoactuator

Abstract

Abstract A piezoactuator-based hydraulic displacement amplifier with two flexible diaphragm spools and one rigid chamber is designed. The elastic characteristics and effective area of the diaphragm spool are theoretically and numerically analyzed. The influencing factors on the effective area of the diaphragm spool are studied by the finite element analysis method. On this basis, a proto-type is produced, and its measurement and control system is built. Experimental results show that the hydraulic amplifier prototype can achieve a stroke range of 540 μm and its amplification ratio is approximately 6.