Prevention of integrator wind-up in PI type controllers
AssigneePerformance Controls, Inc.
InventorCraig Weggel
Life of this patent
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Abstract
A control system having an integrator component that provides an integrator output signal used to control a load, and a method controlling the same includes conditioning the integrator component during a fraction of the period in which it would tend to otherwise wind-up.
Claims17
A control system for controlling a load, the controller comprising:
- an integral gain component adapted to provide an integrating output signal used to control a load;
- and
- a differentiator component adapted to provide a differentiator output signal used by the integral gain component, the differentiator component adapted to receive one of an input signal based on a command signal or a feedback signal.
A control system for controlling a load, the controller comprising:
- a feedback circuit adapted to provide a feedback signal based on operation of the load;
- a first summer adapted to receive a command signal and the feedback signal and generate a system error signal;
- a differentiator component adapted to provide a differentiator output signal, the differentiator component adapted to receive one of an input signal based on the command signal or the feedback signal;
- a second summer adapted to receive the system error signal and the differentiator output signal and generate a modified system error signal;
- and
- an integral gain component adapted to receive the modified system error signal and provide an integrating output signal used to control a load.
A control system for controlling a load, the controller comprising:
- an integrator component adapted to provide an integrator output signal used to control the load;
- and
- a component adapted to reverse-charge the integrator component to a value less than the value required to maintain a steady-state level desired for the load.
A control system for controlling a load, the controller comprising:
- an integrator component adapted to provide an integrator output signal used to control the load;
- and
- a component adapted to condition the integrator component during a fraction of the period in which it would tend to otherwise wind-up.
A method for operating a controller used to control a load, the controller comprising an integrator component adapted to provide an integrator output signal for controlling the load, the method comprising:
- conditioning the integrator component during a fraction of the period in which it would tend to otherwise wind-up.
Dependencies are inferred from the claim text.