System identification for mechatronics/electronic-hydraulics servo device based on labview

This paper describes the method which is used to identify mechatronics/electronic-hydraulic servo device. Topics covered within this paper include that NI-DAQ analog outputs is used for stimulating controlled object (third-order circuit, ACT of DVD optical pick-up, electrohydraulic servo motor). Then the data of stimulation and response is acquired from DAQ analog inputs to establish a real-time system identification application based on LabVIEW by acquiring and preprocessing stimulation & response data. Finally, the model of controlled objects is obtained and analyzed and verified the on-line. The identified result can supply references to control algorithm research, simulation and the control strategy of system.