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- function [Phi, Gamma] = c2d(a, b, t)
- %C2D Conversion of state space models from continuous to discrete time.
- % [Phi, Gamma] = C2D(A,B,T) converts the continuous-time system:
- % .
- % x = Ax + Bu
- %
- % to the discrete-time state-space system:
- %
- % x[n+1] = Phi * x[n] + Gamma * u[n]
- %
- % assuming a zero-order hold on the inputs and sample time T.
- %
- % See also: C2DM, and D2C.
-
- % J.N. Little 4-21-85
- % Copyright (c) 1986-93 by the MathWorks, Inc.
-
- error(nargchk(3,3,nargin));
- error(abcdchk(a,b));
-
- [m,n] = size(a);
- [m,nb] = size(b);
- s = expm([[a b]*t; zeros(nb,n+nb)]);
- Phi = s(1:n,1:n);
- Gamma = s(1:n,n+1:n+nb);
-