Adaptive control of time delay systems and applications to automotive control problems

[摘要] (cont.) The objective in FAR control is to maintain the in-cylinder FAR at a prescribed set point, determined primarily by the state of the Three-Way Catalyst (TWC), so that the pollutants in the exhaust are removed with the highest efficiency. The FAR controller must also reject disturbances due to canister vapor purge and inaccuracies in air charge estimation and wall-wetting (WW) compensation. Two adaptive controller designs are considered. The first design is based on feedforward adaptation while the second design is based on both feedback and feedforward adaptation. Both simulation and experimental results demonstrating the performance improvement by employing the APC are presented. In addition, modifications and improvements to the APC structure, which were developed during the course of the experiments, to solve specific implementation problems are presented.

[发布机构] Massachusetts Institute of Technology