高速风洞微型测量系统研制及应用

The development and application of micro measurement system in high speed wind tunnel

摘要:

研制了一种高速风洞微型测量系统,由电气接口模块、增益控制模块、低通滤波模块、扫描采集模块、主控模块、LAN总线接口模块组成,实现了电压信号放大、低通滤波、模数转换、数据处理与分析等功能,静态校准结果表明关键性能指标与风洞常规测量系统相当,满足风洞试验信号采集需求。将该系统成功应用于2.4米跨声速风洞标模测力试验,开展了对比试验以及测量精度试验,并与常规测量系统试验结果进行了对比,试验结果表明微型测量系统精度和稳定性满足试验要求,能够适应高速风洞应用环境。

Abstract:

A micro measurement system for high speed wind tunnel is developed, which composed of electrical interface module, gain control module, low-pass filter module, scan acquisition module, master control module and LAN bus interface module, realizing voltage signal amplification, low-pass filter, analog digital conversion and data processing and analysis. The static calibration results show that the key performance indicators are equivalent to the conventional wind tunnel measurement system and meet the requirements of wind tunnel test signal acquisition. The system was successfully applied to the standard model’s force test in 2.4 meter transonic wind tunnel, and the comparison test and measurement accuracy test were carried out. The test results were compared with those of the conventional wind tunnel measurement system. The results showed that the precision and stability of the micro measurement system met the test requirements and could adapt the application environment of high speed wind tunnel.