| Popis: |
Classical time-averaging is widely used for MEMS/MOEMS dynamic behavior investigations. In order to evaluate the information on maximum amplitude at a given load of vibrating object one needs to evaluate the argument of Bessel function that encodes the useful information. For this purpose many different approaches were presented. Among them Temporal Phase Shifting applied to Bessel fringes is of special interest since it provides most accurate results. It, however, requires additional cumbersome pixelwise correction routine via specially designed look-up-table. In this paper we investigate, through extensive numerical simulations, the possibility of reduction of phase evaluation error (without correction routine) by different strategies of phase shifting. Two different 5 step algorithms are investigated for that purpose. Additionally, quick and robust correction procedure based on evaluated phase distribution is presented. |
