[1] Willems J C. Almost invariant subspaces:an approach to high-gain feedback design-Part Ⅰ:Almost controlled invariant subspaces[J]. IEEE Trans Automat Control, 1981, AC-26(2):235-252. [2] Willems J C. Almost invariant subspaces:an approach to high-gain feedback design-Part Ⅱ:Almost conditionally invariant subspaces[J]. IEEE Trans Automat Control, 1982, AC-27(5):1071-1085. [3] Marino R, Respondek W, Van der Schaft A J. Almost disturbance decoupling for single-input single-output nonlinear systems[J]. IEEE Trans Automat Control, 1989, 34(5):1013-1017. [4] Marino R, Respondek W, Van der Schaft A J, et al. Nonlinear H∞ almost disturbance decoupling[J]. Systems Control Lett, 1994, 23(2):159-168. [5] Isidori A. A note on almost disturbance decoupling for nonlinear minimum-phase systems[J]. Systems Control Lett, 1996, 27(2):191-194. [6] Qian C J, Lin W. Almost disturbance decoupling for a class of high-order nonlinear systems[J]. IEEE Trans Automat Control, 2000, 45(6):1208-1214. [7] Lin W, Qian C J. Adding one power integrator:A tool for global stabilization of high-order lower-triangular systems[J]. Systems Control Lett, 2000, 39(3):339-351. [8] Lin W, Qian C J. Adaptive regulation of high-order lower-triangular systems:an adding power integrator technique[J]. Systems Control Lett, 2000, 39(3):353-364. [9] Isidori A. Global almost disturbance decoupling with stability for nonminimum-phase single-input single-output nonlinear systems[J]. Systems Control Lett, 1996, 28(2):115-122. [10] Lin Z. Almost disturbance decoupling with global stability for nonlinear systems with disturbance affected unstable zero dynamics[J]. Systems Control Lett, 1998, 33(2):163-169. |