Control systems

A system for operating a plant, comprising:

• a setpoint interface configured to provide a setpoint to the plant;
• a feedback structure communicating between a plant output of the plant and the setpoint interface;
• a compensator receiving the setpoint from the setpoint interface and operating on the setpoint and feedback from the plant to provide a series of plant inputs to the plant to provide a desired plant input or desired plant output;
• a module providing a set of compensator coefficients for setting operation of the compensator determined using the steps:
• a) introducing a predetermined input into the plant;
• b) measuring an impulse response of the plant responding to the predetermined input;
• c) determining a mathematical model for the plant based at least in part on the impulse response of the plant, the mathematical model for the plant comprising a first ratio of polynomials including a first set of coefficients;
• and
• d) determining a second ratio of polynomials including a second set of coefficients for the compensator based at least in part on the first set of coefficients to operate the compensator such that the compensator produces a series of plant inputs to move the plant towards a setpoint according to a predetermined plant output.

A system for operating a plant, comprising:

• a setpoint interface configured to provide a setpoint to the plant;
• a feedback structure communicating between a plant output of the plant and the setpoint interface;
• a compensator receiving the setpoint from the setpoint interface and operating on the setpoint and feedback from the plant to provide a series of plant inputs to the plant to provide a desired plant output;
• a module providing a set of compensator coefficients for setting operation of the compensator under different loads:
• a) introducing a predetermined input into the plant under different loads;
• b) measuring an impulse response of the plant responding to the predetermined input under each of the different loads;
• c) determining a mathematical model for the plant based at least in part on the impulse response of the plant under each of the different loads, the mathematical model for the plant comprising a first ratio of polynomials including a first set of coefficients corresponding to each of the different loads;
• and
• d) determining a second ratio of polynomials including a second set of coefficients for the compensator based at least in part on the first set of coefficients to operate the compensator under each of the different loads, thereby providing a plurality of the second set of coefficients corresponding to different loads;
• and
• a controller for receiving load information regarding the plant, the controller operating the compensator using one of the plurality of the second set of coefficients based on the load information such that the compensator produces a series of plant inputs to move the plant towards a setpoint according to a predetermined plant output.