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介绍了北航D4风洞发展的一套具有同步测控技术的张线支撑系统,该系统较好地解决了运输机后体气动特性研究中模型支撑与其气动干扰之间的矛盾。从功能上该张线支撑系统分为控制子系统与测量子系统两部分。首先,该张线支撑机构通过两个步进电机进行驱动,所以需要控制子系统对两电机进行同步控制,从而实现对试验模型迎角的精确控制。其次,该张线支撑机构的测量子系统实现了与北航D4风洞测压、测力、PIV等数据采集系统的联动,通过与控制子系统进行网络通信,可以进行在迎角序列下的同步测量,从而可以大幅度提高试验效率。最后,利用该张线支撑系统,在北航D4风洞进行了运输机后体流动特性的风洞试验研究,结果表明该张线支撑系统满足试验要求。
The paper introduces a set of support system with synchronous measurement and control technology developed for the BeiAn D4 wind tunnel. This system solves the contradiction between the model support and its aerodynamic interference in the study of the aerodynamic characteristics of the transporter rear body. From the function of the line support system is divided into control subsystem and measurement subsystem in two parts. First of all, the wire support mechanism is driven by two stepper motors, so the control subsystem is required to synchronously control the two motors so as to achieve accurate control of the attack angle of the test model. Secondly, the measurement subsystem of the line support mechanism realizes the linkage with the data acquisition system of pressure measurement, force measurement and PIV of Beihang D4 wind tunnel. Through the network communication with the control subsystem, it can perform the synchronization under the attacking angle sequence Measurement, which can greatly improve the test efficiency. Finally, the wind tunnel test of the rear flow field of the transport aircraft was carried out at the Beihang D4 wind tunnel by using the line support system. The results show that the support system meets the test requirements.