Is transfer Function of a mathematical system unique?

[auphi]

I have gone through a mathematical modelling of a mass spring dashpot system in which if substitute differently we get different transfer functions. How does this really happen as we say Transfer function of a system is unique.

 

[meBigGuy]

Need more info. Not sure what you mean by " which if substitute differently".

Changing any parameters will change the transfer function. Mass, spring characteristes, etc.

 

[Baluncore]

Changing any of the physical parameters of the system will change only the coefficients of the transfer function; the mathematical form of the transfer function will stay the same.