軌跡判定法を利用した弁-管路油圧系の安定判別(機械力学,計測,自動制御)

概要

論文の詳細を見る
If a mathematical model is provided for an oil hydraulic device, its stability can be analyzed on the basis of the poles of the governing transfer function derived from the model. When the device is connected to pipes where the changes of pressure and flow are propagated as waves, however, the transfer function becomes too complicated to find its poles even numerically. The present paper intended to break through this difficulty by utilizing "Locus Method", which is a calculus of roots formerly developed by one of the present authors. The method was tested for a sample circuit consisting of a poppet valve, a tank and a pipe connecting both, proving capable of accurately calculating the eigenvalues. With those eigenvalues it became possible to examine how the stability of the circuit depends on the pipe length and other model parameters as well. In consequence, it turned out that the viscosity cannot be neglected for stability analysis of an oil hydraulic circuit including pipes. Finally, the self-excited vibration of the poppet valve was actually measured and was compared with the analysis in terms of the excitation frequency.
一般社団法人日本機械学会の論文
2002-01-25