動安定風胴試験の一方法について

抄録

Descriptions about dynamic wind tunnel tests, using a free oscillation technique at low speed, are given together with the obtained results.
Two kinds of "in-put" signals are taken. One of them is the "step" signal, and the other is the "random" signal. And data of expriments in the former are analyzed by Fourier integral method, and the ones in the latter by computing the power spectrums of signals.
Obtained results show;
1) By a free oscillation technique, which is one of the simplest techiques, we can get the dynamic stability derivatives of the model airplanes; C_mα, C_mq+C_mα, C_lp, C_nβ and C_nr-C_nβ, and these are able to simulate the one of the true airplanes.
2) Especially paying attention to the accuracy of the analysis, we can get the derivatives; C_lβ, C_lr and C_np, at any rate.