Matlab中N是什么意思,matlab中[n,d]=c2dm(num,den,0.1,"zoh")其中c2dm是表示什么意思

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一个函数,把连续的线性时不变系统转换成离散的线性时不变系统

c2dm Conversion of continuous LTI systems to discrete-time.

[Ad,Bd,Cd,Dd] = c2dm(A,B,C,D,Ts,'method') converts the continuous-

time state-space system (A,B,C,D) to discrete time using 'method':

'zoh' Convert to discrete time assuming a zero order

hold on the inputs.

'foh' Convert to discrete time assuming a first order

hold on the inputs.

'tustin' Convert to discrete time using the bilinear

(Tustin) approximation to the derivative.

'prewarp' Convert to discrete time using the bilinear

(Tustin) approximation with frequency prewarping.

Specify the critical frequency with an additional

argument,i.e.c2dm(A,B,C,D,Ts,'prewarp',Wc)

'matched' Convert the SISO system to discrete time using the

matched pole-zero method.

[NUMd,DENd] = c2dm(NUM,DEN,Ts,'method') converts the continuous-

time polynomial transfer function G(s) = NUM(s)/DEN(s) to discrete

time,G(z) = NUMd(z)/DENd(z),using 'method'.