The flow induced oscillation in a cavity exposed to external high speed flow and its suppression by means of sound excitation at the leading edge of the cavity are experimentally studied.
实验研究了矩形空腔在外部高速气流作用下诱导的空腔内流动振荡问题，以及从空腔前缘加入纯音声激励以抑制空腔内流动振荡的技术。
Analysis of dynamic simulation shows that this optimal excitation system can increase the system damping, improving stability, with good low-frequency oscillation suppression and robustness.
动态仿真分析表明，设计出的最优励磁系统能够有效地增加系统的阻尼，提高系统的稳定性，且能够很好地抑制系统的低频振荡，并具有较好的鲁棒性。
The DSP realizes functions of sampling, PI regulation, communication and so on to digitally control the excitation current of arc-suppression coil with magnetic bias.
DSP主要完成采样、PI调节和通信等，实现偏磁式消弧线圈励磁电流的数字控制。
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