Research of describing function method on gas generator pressure closed-loop oscillation

被引：0
|
作者：
Nie L.-C. [1 ]
Zhang Z.-W. [1 ]
Li Y. [1 ]
机构：
[1] Beijing Power Machinery Institute, Beijing
来源：
| 2016年 / Journal of Propulsion Technology卷 / 37期
关键词：
Describing function; Gas generator; Pressure fluctuations; Solid rocket ramjet;
D O I：
10.13675/j.cnki.tjjs.2016.03.018
中图分类号：
学科分类号：
摘要：
In order to study the low frequency pressure oscillation of a flow adjustable gas generator in solid rocket ramjet, gas generator dynamic mathematic model was built and the open-loop frequency character of the pressure closed-loop control system was analyzed. Describing function method was used to analyze the relation of servo system hysterics nonlinear and pressure oscillation. Pressure oscillation frequency and amplitude were achieved by calculating the node of hysterics nonlinear describing function negative reciprocal character and open-loop frequency character. In general, the calculated results agree well with the test results. The pressure oscillation problem was solved by correcting open-loop frequency character of the controller to avoid it intersecting with hysterics nonlinear describing function negative reciprocal. Experimental results show that this method has the smaller pressure oscillation of less than 2%. © 2016, Journal of Propulsion Technology. All right reserved.
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收藏
页码：540 / 545
页数：5
相关论文
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