Study of a Safety System for a Hydraulic Multidegree of Freedom Vibration Facility

摘要

A general failure analysis of a servohydraulic test facility is performed. The network of an extensive electroservohydraulic safety system is developed on the basis of the concepts of online and standby redundancy which is capable of protecting the test facility and the payload from malfunctions. Essential parts of the dynamic and logic systems are treated theoretically. Representative failures are selected for a hardware test covering the effects of all serious system failures. A final version of an electrohydraulic safety system is described. A hydraulic system was constructed using switches to simulate pump failures and line breaks and tests of the safety system were conducted, showing satisfactory results. Results of the hardware test of the safety system are presented and discussed. The system ensures a smooth shutdown of the test facility whenever any of the representative failures occur.