ABSTRACT
In Nanjing Hydraulic Research Institute (NHRI), the NHRI – 400gt centrifuge had been operating for more than twenty years since 1991. In 2016 and 2017, the machine was thoroughly upgraded without changing its basic engineering. Upgrades were made to the mechanical system, electrical system and data-acquisition system.A torque motor and a matched drive control system were employed to drive the machine directly, rather than the traditional DC motor – reducer drive system. Also, the new data-acquisition system includes 90 static data channels and 38 dynamic data channels. The brand new NHRI - 400gt geotechnical centrifuge is expected to operate for decades more.
