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颤振试验技术是研究飞行器颤振特性、评估安全飞行包络线的一项重要试验技术。为了满足颤振试验需要的定马赫数阶梯变速压和定总压线性变马赫数的试验要求,结合2.4m跨声速风洞的特点,有针对性地进行了控制策略设计。主要采用运动规律法和智能分段变PI实现变速压智能控制,应用运动函数实现了线性变马赫数智能控制。结果表明:该流场控制技术满足颤振试验的特殊要求,取得了流场调节过程快速、准确、可靠的试验效果。
Flutter test technology is an important experimental technique for studying flutter characteristics of aircraft and evaluating safe flight envelopes. In order to meet the test requirements of constant Mach number step change pressure and constant pressure linear Mach number required by chatter test, combined with the characteristics of 2.4 m transonic wind tunnel, the control strategy design was carried out in a targeted manner. Mainly using the law of motion and intelligent segmentation variable PI to achieve variable speed pressure intelligent control, the application of motion function to achieve a linear variable Mach number of intelligent control. The results show that the flow field control technology meets the special requirements of flutter test, and the rapid, accurate and reliable test results of the flow field adjustment process are obtained.