US 11,914,332 B2
Adaptive PID gain for a zero order process
William Brian Piercy, League City, TX (US); and Randy Marvin Miller, Houston, TX (US)
Assigned to Schneider Electric Systems USA, Inc., Foxborough, MA (US)
Filed by Schneider Electric Systems USA, Inc., Foxborough, MA (US)
Filed on Oct. 12, 2021, as Appl. No. 17/498,939.
Claims priority of provisional application 63/091,161, filed on Oct. 13, 2020.
Prior Publication US 2022/0113684 A1, Apr. 14, 2022
Int. Cl. G05B 13/02 (2006.01); G05B 11/42 (2006.01)
CPC G05B 13/024 (2013.01) [G05B 11/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for adaptively tuning a Proportional, Integral and Derivative (PID) controller in a zero order industrial process, the method comprising:
receiving input data at one or more inputs of the PID controller;
generating output data at one or more outputs of the PID controller in response to processing the input data;
determining controller error based on an analysis of a measured parameter with respect to a desired setpoint, the measured parameter indicated in the output data;
applying adaptive gain to the PID controller in response to the absolute value of the controller error exceeding a deadband and increasing; and
applying normal gain, which is lower than the adaptive gain, to the PID controller in response to the absolute value of the controller error being at or below the deadband or decreasing.