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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Kum, Dongsuk Peng, Huei Bucknor, Norman |
| Copyright Year | 2011 |
| Abstract | The parallel hybrid electric vehicle (HEV) with a single pre-transmission electric motor (the P2 configuration) has a challenging drivability issue during engine-starts because the motor must simultaneously provide the propulsion torque demand and start the engine. The goal of this study is to present a design process to achieve optimal balance between these two conflicting goals. We first develop a control-oriented HEV powertrain model to accurately predict the engine, clutch, and vehicle dynamics. Assuming that the clutch torque can be accurately estimated and perfectly cancelled, an optimal engine-start control problem is formulated to minimize engine-start time while accurately supplying the driver torque demand simultaneously. This nonlinear constrained optimal control problem is solved numerically using Dynamic Programming (DP). DP results show that a proper constant clutch pressure level, which leads to constant torque disturbance that is easy to cancel out using the motor, can achieve near-optimal performance. Furthermore, the DP control policy is found to be time-invariant, and thus can be directly implemented in the form of a full state feedback controller. |
| Sponsorship | Dynamic Systems and Control Division |
| Starting Page | 287 |
| Ending Page | 294 |
| Page Count | 8 |
| File Format | |
| ISBN | 9780791854761 |
| DOI | 10.1115/DSCC2011-6183 |
| Volume Number | ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, Volume 2 |
| Conference Proceedings | ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control |
| Language | English |
| Publisher Date | 2011-10-31 |
| Publisher Place | Arlington, Virginia, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Design Torque Optimal control Control equipment Propulsion Pole placement Dynamic programming Hybrid electric vehicles Pressure Vehicle dynamics Engines Electric motors |
| Content Type | Text |
| Resource Type | Article |
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