Abstract
In this paper, the global stability and nonlinear behavior of a poppet valve circuit with a pipeline are studied by the digital simulation method. First, the local stability, or the stability of the steady state, is examined analytically, assuming that the pipeline is a lossless distributed-parameter element, and it is clarified that the instability of small valve lift is due to the effect of the pipeline. Second, it is shown that hard self-excited vibrations occur when disturbances beyond a certain critical value are imposed on the valve, and they can occur even for supply pessures lower than the setting pressure of the valve.
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