5Agarwal R C, Burrows C S. New recursive digital filter structures having low sensitivity and round-off noise[J]. IEEE Trans Circuits & Systems,1975,22(2):921-927.
6Middleton R H, Goodwin G C. Improved finite word length characteristics in digital control using delta operators[J]. IEEE Trans Automatic Control, 1986, 31(11) : 1015-1021.
7Goodwin G C, Leal R L, Middleton R H. Rapprochement between continuous and discrete model reference adaptive control[J]. Automatica, 1986,22(2):199-207.
8Middleton R H, Goodwin G C. Digital Control and Estimation: A Unifitd Approach [ M ]. Englewood Cliffs: Prentice-Hall, 1990.
9Goodwin G C, Middleton R H, Poor H V. High-speed digital signal processing and control[J]. Proc IEEE,1992,80(2):240-259.
10Wu J, Chen S, Li G, et al. Shift and delta operator realizations for digital controllers with finite word length considerations[J]. IEE Proc Part D, 2000,147(6) : 664-672.
7Young P, et al. Proportional-integral-plus(PIP) design for delta operator systems part 1. SISO system[J]. International Journal of Control, 1998,70( 1 ) : 123-147.
8Liu G P. Design of stable proportional-integral-plus controllers [J]. International Journal of Control, 2001,74(16).
9Warren T, et al. Directional Drilling with Casing [ P ]. SPE79914, 2005:17-23.