Abstract: A predictive header pressure controller uses predictive boiler steaming models to anticipate future changes in boiler steaming rates, converts the anticipated steaming rates to anticipated rates of change in header pressure, compares the anticipated rates of change of header pressure to measured rates of change of header pressure and controls header pressure of a multi-boiler energy system to a derived rate of change header pressure setpoint. The control may be accomplished by a control action that is integral only or it may be an incremental output directly compatible with distribution hubs. A control signal is directed to one or more control devices that adjust and control header pressure.

Abstract: A recurrent distribution network provides an embedded, cost-based decision mechanism for a real-time, closed-loop process control system that outputs to multiple controllable output devices while observing numerous input constraints. A global incremental distribution request to increase or decrease a controlled process variable is accepted by a recurrent neural network. The network iteratively solves and applies a distribution of a global incremental request to multiple controllable output devices based on individual incremental unit costs, output ranges, output scaling and process input constraint limits.

Abstract: A fuzzy logic controller system comprising a plurality of fuzzy logic controller units cascadably coupled to one another, each controller having a membership processor for receiving a single input signal corresponding to a sensed parameter from a controlled system and performing fuzzy inference operations based on the input signal for outputting an incremental output signal indicative of a requested change in a controlled output from a current level, a permissions processor for scaling the incremental output signal in response to a fulfillment signal from another controller, a processor responsive to the membership processor and to the permissions processor for providing a fulfillment signal to another controller indicative of a permissible range of freedom for scaling the incremental output signal of the another controller in the cascading sequence, an adder for summing each of the incremental output signals from the plurality of controllers and applying the sum to the controlled output for providing a corre