Development of Fatigue Test Bench for Engine Crankcase Based on CompactRIO Controller.

By using Compact RIO controller made by NI company as control core and adopting the PID controller of Labview software, wave generator and special control components including FPGA toolkit, a hydraulic fatigue test system for engine crankcase is developed, and the loading of hydraulic pressure, the collection of strain signals at the specific points of crankcase and the closed-loop control of hydraulic servo solenoid are realized. With the change in strain values at specific points as the criterion of crankcase crack, the on-line identification of the fatigue failure of engine crankcase is realized. [ABSTRACT FROM AUTHOR]