“…Xin and Xueye, as well as Utku, presented an interesting method of controlling a flexible mirror with a PVDF actuator by using wavefront Zernike polynomial decomposition (Xin and Xueye, 1994;Utku et al, 1995). Analytic governing systems of equations have been developed by various authors, but none directly solved (Do¨kmeci, 1978;Sun, 1993;Tzou and Howard, 1994). Solutions to date rely mainly on approximation methods, such as finite element methods, to produce the weak solution (Berdichevsky, 1979;Tzou and Tseng, 1990).…”