Title :
Robust control and coordination of engine systems
Author :
Raftar, Abbas ; Le Yi Wang ; Orzel, D.
Author_Institution :
Powertrain Core Competency, Ford Motor Co., Allen Park, MI, USA
Abstract :
In this paper, a novel two-step design procedure is introduced for robust control and coordination of engine idle speed and emission systems. The procedure starts with the optimal broad-band decoupling of engine subsystems via feedforward compensation. The problem can be reduced to a standard H∞ optimization problem and solved by using Nevanlinna-Pick interpolation. A robust decentralized control in H∞ is then employed to achieve robust stabilization and disturbance attenuation of the compensated systems. A computer search algorithm for optimal decentralized PI controllers is developed. Benefits of the two-step design include modularization of control tasks, enhancement of robustness and performance, reduction of calibration time and complexity
Keywords :
H∞ control; angular velocity control; automobiles; decentralised control; interconnected systems; internal combustion engines; interpolation; robust control; search problems; two-term control; H∞ control; H∞ optimization; Nevanlinna-Pick interpolation; PI controllers; automotive engines; decentralized control; disturbance attenuation; emission system; engine idle speed; feedforward compensation; interconnected systems; optimal broad-band decoupling; robust control; search algorithm; two-step design; Attenuation; Control systems; Distributed control; Engines; Interconnected systems; Interpolation; Mechanical power transmission; Optimal control; Robust control; Robustness;
Conference_Titel :
Control Applications, 1996., Proceedings of the 1996 IEEE International Conference on
Conference_Location :
Dearborn, MI
Print_ISBN :
0-7803-2975-9
DOI :
10.1109/CCA.1996.558966
