Method for the model-based operation of a coolant system, control unit, and fuel cell system

A non-transitory, computer-readable medium comprising instructions which, when executed by a computer, cause the computer to control model-based operation of a controlled subsystem of a coolant system (Σp(⋅)) by:

• determining a control variable (y(k)) and from time derivatives ({dot over (y)}(k), ÿ(k), . . . , y(n)) of the control variable (y(k)) up to a system order (n) of an augmented system model (Σm,aug (⋅)) of the controlled system Σp(⋅)), determining an actual manipulated variable (uact(k)) of an actuator (Σa(⋅)) of the controlled system Σp(⋅)), and
• providing a requested compensation term and/or correction term (dreq(k)) in dependence on the determination.

A controller (110), comprising a memory in which a code is stored, and a computer, wherein when the code is executed by the computer to control model-based operation of a controlled subsystem of a coolant system (Σp(⋅) by:

• determining a control variable (y(k)) and from time derivatives ({dot over (y)}(k), ÿ(k), . . . , y(n)) of the control variable (y(k)) up to a system order (n) of an augmented system model (Σm,aug(⋅)) of the controlled system (Σp(⋅))
• determining an actual manipulated variable (uact(k)) of an actuator (Σa(⋅)) of the controlled system (Σp(⋅)), and
• providing a requested compensation term and/or correction term (dreq(k)) in dependence on the determination.