Research And Real-time Monitoring And Control Platform Based On Vxi And Vxworks Wind Tunnel

This thesis mainly studies the design of the real time measure and control system of wind tunnel. Basically the traditional measure and control system of wind tunnel runs in the Windows Operation System. But Windows OS is designed aiming at universal computer and objective, so there is some restriction about real time control and data acquisition of the wind tunnel system based on this OS. To overcome this shortcoming and construct a strong real time and high reliable system, this thesis adopts methods as follows. In the hardware flat, this thesis not only adopts VXI bus which widely applies to the field of measure and control, but also selects the embedded control mode which has performance of data transfer and reliability better than other mode. In the software flat, this thesis adopts the VxWorks OS which has the most excellent performance of real time and reliability among the embedded real time operation systems. Moreover, two computers are employed in this system, one named upper computer and other named lower computer. This real time measure and control system is brand-new in the field of wind tunnel. This thesis is based on the study of wind tunnel system. First, select the devices that the system needs, compare the embedded real time OS with universal OS and deeply probe into VxWorks OS. Secondly, discuss the design and edit of drivers of the VXI modules which apply to data acquisition in VxWorks OS on the base of virtual instrument software frame. Then, expound the design of motion control system founding on the theory of automatic control, and realize the drivers of the motion controller which takes VME bus. Finally, describe the debugging and application flat based on upper/lower computers. At present, this measure and control system has successfully applied to the wind tunnel measure and control and runs properly.