Imprecisions from controller software implementation can substantially affect a controller’s performance for leading a physical plant to a desired behavior. In this paper, a discrete-time quasi-sliding mode approach is used to design a controller with improved robustness to software implementation imprecisions. The application of the controller is illustrated for automotive cold start hydrocarbon emissions. The designed controller shows more robustness with respect to implementation imprecisions including sampling, quantization and fixed-point arithmetic when compared to its continuous-time counterpart. In particular, the influence of the sampling time is investigated and a controller configuration with minimal computational requirements is proposed. Finally, the performance of the new controller is verified with real-time simulations.
- Dynamic Systems and Control Division
Impact of Implementation Imprecision on Sliding Mode Controller Design for Automotive Cold Start Emissions
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Hansen, A, Shahbakhti, M, & Hedrick, JK. "Impact of Implementation Imprecision on Sliding Mode Controller Design for Automotive Cold Start Emissions." Proceedings of the ASME 2012 5th Annual Dynamic Systems and Control Conference joint with the JSME 2012 11th Motion and Vibration Conference. Volume 2: Legged Locomotion; Mechatronic Systems; Mechatronics; Mechatronics for Aquatic Environments; MEMS Control; Model Predictive Control; Modeling and Model-Based Control of Advanced IC Engines; Modeling and Simulation; Multi-Agent and Cooperative Systems; Musculoskeletal Dynamic Systems; Nano Systems; Nonlinear Systems; Nonlinear Systems and Control; Optimal Control; Pattern Recognition and Intelligent Systems; Power and Renewable Energy Systems; Powertrain Systems. Fort Lauderdale, Florida, USA. October 17–19, 2012. pp. 339-348. ASME. https://doi.org/10.1115/DSCC2012-MOVIC2012-8723
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