Stabilized Deteministic Optimization Based Control System and Method

A control method, comprising:

• a first stabilizing feasible control trajectory of a plurality of variables of a controlled process for a second time step within a predetermined time frame based upon a control trajectory applied for a first time step previous to the second time step, the trajectory extending over a plurality of future time steps after the first time step;
• applying an optimization-based control algorithm to determine a second feasible control trajectory for a second time step;
• selecting the first feasible control trajectory if a first cost of applying the first feasible control trajectory is less then a second cost of applying the second feasible control trajectory, or if the optimization-based control algorithm does not determine a second feasible control trajectory in a time allowed;
• and
• controlling the controlled process by application of the selected control trajectory.

A control system, comprising:

• memory circuitry for storing executable code, and processing circuitry for executing the code, the code defining steps that, when executed:
• determines a first stabilizing feasible control trajectory of a plurality of variables of a controlled process, the first control trajectory being the same as or an extension of a control trajectory applied for a first time step, the trajectory extending over a plurality of future time steps after the first time step;
• determines a second feasible control trajectory for the plurality of variables for a second time step subsequent to the first time step;
• determines a first cost of applying the first feasible control trajectory at the second time step;
• determines a second cost of applying the second feasible control trajectory at the second time step;
• compares the first and second costs;
• selects the first feasible control trajectory or the second feasible control trajectory based upon the comparison within a predetermined time frame;
• and
• controls the controlled process by application of the selected control trajectory.