How to design a sliding mode control for heat exchanger

[amogh]

Thodot=(vh*0.01)*(Th1-Th2)+0.9*(Tc2-Th2);
Tcodot=((vc*.01)*(Tc1-Tc2))+0.9*(Th2-Tc2);

Design the sliding mode controller for the above formula's

[moderator1983]

What is the expectation, its not clear..!!

Can you explain it, may be using some GUI OR Front Panel....??