A two-colour compensation (TCC) method was developed for measuring the tilt angle of a gauge block generated by the beating motion of a dragonfly in a wind tunnel. In this method, a wavelength correlation was used to compensate the error due to beam fluctuations induced by air turbulence. The repeatability and resolution of the TCC method were determined by using a piezo translator (PZT) to generate the tilt angle variation. The results show that by using the TCC method the error in tilt angle measurement due to air turbulence can be decreased by about 50% compared with that using a one-wavelength method. The TCC method was then applied to measure the tilt angle variation caused by the beating motion of a dragonfly attached to one end of a gauge block in a wind tunnel for a wind velocity of . The results confirmed the effectiveness of this new method.
No takes yet. Share an insight, caveat, or question.
Zeng et al. (1996) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: