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从理论上推导出一个确定带有控制系统的Rijke管的稳定性的条件，并研究了管中声模式的复本征频率与放大倍数和相移的关系。然后通过分析管末端声波反射条件的变化，阐述了有源控制热声不稳定性的机理。最后对有源控制进行了实验研究．该研究说明了起源于线性扰动（声学量级）的非线性的不稳定增长过程，可以用一个线性的小扰动去控制，使系统达到稳定．我们的理论与实验结果再一次证明了有源控制流体动力不稳定性的可能性。
Theoretically, a condition for determining the stability of a Rijke tube with a control system is deduced. The relationship between the complex frequency and the magnification and the phase shift of the acoustic modes in the tube is also studied. Then the mechanism of active control of thermoacoustic instability is analyzed by analyzing the change of acoustic reflection conditions at the end of pipe. Finally, the experimental study of active control. The study shows that the nonlinear instability growth process originating from linear perturbations (acoustic magnitude) can be controlled with a small linear perturbation to stabilize the system. Our theoretical and experimental results prove once again the possibility of active control of hydrodynamic instability.