Dynamic Modification Of Reference Value For Reduction Of Negative Effects Of Actuator Constraints In Single-loop Pid Control Systems

摘要

A modification of the PID digital controller algorithm, based on the introduction of a virtual reference value that never exceed active constraints in the actuator output is presented and investigated. This idea derived from virtual modification of a control error can be used in digital control systems subjected by both: magnitude and rate constraints. The adaptation (to the actuator constraints) is performed by a special transformation of the control error, and is equivalent to introduction of a new, virtual reference value for the control system. Simulation results for dynamic, linear SISO systems are presented for comparison of the proposed approach with used techniques.