How to realize a transfer function with higher order of numerator than denominator in simulink

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M Gokul 2016-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/287667-how-to-realize-a-transfer-function-with-higher-order-of-numerator-than-denominator-in-simulink

编辑： Walter Roberson 2016-6-4

i have a transfer function with

numerator[1, 78.950062660604830, 1.815200121554239e+02, 36.575440752867635, 3.055318871646536, 0.117117813888395, 0.001677095715607]

denominator[0, -4.263256414560601e-14, -0.019224782950857, -1.475248897303658, -0.220162800430712, -0.014174089068338, -3.457982805227878e-04]

but while inputing these values in simulink transfer function block i am getting error order of denominator must be greater than order of numerator. what should i do in order to continue working with the same transfer function.

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Answer 1

Walter Roberson 2016-6-4

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编辑：Walter Roberson 2016-6-4

Leading zeros in the transfer function are ignored, so you have degree 6 divided by degree 5. Simulink requires that the denominator be at least degree 7 for a degree 6 numerator.

With your transfer function being higher degree numerator than denominator, the long term effect is like multiplying by s, which is not going to be stable