Conditioning technique, a general anti-windup and bumpless transfer method
Automatica (Journal of IFAC)
Nonlinear systems analysis (2nd ed.)
Nonlinear systems analysis (2nd ed.)
A unified framework for the study of anti-windup designs
Automatica (Journal of IFAC)
Computer Controlled Systems: Theory and Design
Computer Controlled Systems: Theory and Design
Brief Paper: Anti-Windup Designs for Multivariable Controllers
Automatica (Journal of IFAC)
Brief Windup prevention for unstable systems
Automatica (Journal of IFAC)
Brief Systematic closed-loop design in the presence of input saturations
Automatica (Journal of IFAC)
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Presented is a windup prevention method guaranteeing stability for stable and unstable MIMO systems with input saturation. It is based on a closed loop structure consisting of a feedforward part for reference signal tracking and a feedback part for system stabilization and for disturbance rejection. The feedforward control uses a nonlinear model based reference filter, shaping arbitrary reference signal inputs such that only the safely applicable signals are transferred to the plant. Furthermore, the plant input signals generated are confined to predefined amplitude limits. Thus the new approach allows one to reserve part of the limited input amplitudes for disturbance attenuation and to use only the remaining part for the reference tracking. The reference shaping filter also yields a systematic prevention of the directionality problem. Two examples demonstrate the design procedure and the results achievable.