液体管路用アクティヴ形脈動減衰装置の開発 : 第4報,システムの安定性の検討

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The key considerations of the design of the active attenuator for wide-band random pressure pulsation, in which the transfer-function-based control method is used, may be said to be the following : (1) obtaining a satisfactory attenuation performance by matching a transfer function of the controller (specifically, the signal processor) with the desired (target) characteristics as precisely as possible and (2) preventing howling by increasing the degree of stability. This paper presents an analysis of a stability problem of our newly designed active attenuation system, which was carried out from the viewpoint of the above-described objective (2), in succession to the previous paper studied from the viewpoint of objective (1), together with considerations of the stability of Lueg's system. It has been confirmed by both theoretical analysis and tests carried out on the small-sized model experimental pipeline that the present active attenuation system, which detects the progressive wave propagating in the downstream direction alone and then controls the single second source using this signal, gives a far better degree of stability than that of Lueg's system. Furthermore, the tolerance of error in setting up the characteristics of the controller, such that the stable operation can be achieved while maintainning a satisfactory attenuation (around -20 dB) for almost all harmonics of the wide-band random pulsation including harmonics of 15 to 400 Hz, also been clarified.
社団法人日本機械学会の論文
1993-10-25

液体管路用アクティヴ形脈動減衰装置の開発 : 第4報,システムの安定性の検討

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