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| 2. |
- Templin, Peter, 1969
(author)
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A Diesel Engine Model, including Compression Brake, for Powertrain Control
- 2002
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In: SAE International Truck & Bus Conference 2003.
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Conference paper (peer-reviewed)abstract
- A diesel engine model, designed for studying eventsduring automated gear shifting in a heavy duty truck ispresented. It will be used for developing and evaluatingpowertrain control strategies. The deceleration inengine speed to the new synchronous speed, duringan upshift, is of special intereset. The straightforwardapproach is to cut fuel and wait for the engine to slowdown due to friction and pumping losses. In manycases, this approach is too slow, and the engine compressionbrake needs to be activated.The engine model, assuming quasi-steady, bidirectionalthermodynamic flow with constant specificheat capacities, is implemented using Modelica. Asimple model of the hydraulic circuit that governs theactivation of the compression brake mode is incorporatedin the model.Problems related to the simulation of the engine brakesystems are discussed. They are handled by empiricalcorrection factors. Measurements from rapid enginespeed decelerations are used for verification.
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| 3. |
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| 4. |
- Templin, Peter, 1969, et al.
(author)
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A Powertrain LQR Torque Compensator with Backlash Handling
- 2011
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In: Oil and Gas Science and Technology. - : EDP Sciences. - 1294-4475 .- 1953-8189. ; 66:4, s. 645-654
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Journal article (peer-reviewed)abstract
- This paper derives an LQR anti-jerk controller for an automotive driveline.The time derivative of the drive shaft torque, which is closely related to the vehicle jerk, is used as a virtual system output and regulated to zero. Thereby, the controller does not need a reference model for generation of reference trajectories for the control law evaluation. The controller acts as a torque compensator for the driver’s torque demand which the controller output asymptotically follows. The properties of the controller are discussed and the behavior is illustrated by simulation examples and verified with experiments on a heavy duty truck.
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| 5. |
- Templin, Peter, 1969, et al.
(author)
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An LQR torque compensator for driveline oscillation damping
- 2009
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In: 2009 IEEE International Conference on Control Applications, CCA '09; Saint Petersburg; Russian Federation; 8 July 2009 through 10 July 2009. - 1085-1992. - 9781424446018 ; , s. 352-356
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Conference paper (peer-reviewed)abstract
- This paper derives an LQR anti-jerk controller for an automotive driveline. The time derivative of the drive shaft torque, which is closely related to the vehicle jerk, is used as a virtual system output and regulated to zero. Thereby the controller does not need a reference model for generation of reference trajectories for the control law evaluation. The controller acts as a torque compensator for the driver's torque demand which the controller output asymptotically follows. The properties of the controller are discussed and the behavior is illustrated by simulation examples.
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| 6. |
- Templin, Peter, 1969, et al.
(author)
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Experimental Results for a Powertrain LQR-torque Compensator with Backlash Handling
- 2009
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In: 2009 IFAC Workshop on Engine and Powertrain Control, Simulation and Modeling. - 1474-6670. - 9783902661586 ; , s. 148-153
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Conference paper (peer-reviewed)abstract
- This paper extends an LQR anti-jerk torque compensator for an automotive driveline with an optimization based handling of the backlash. The time derivative of the drive shaft torque, which is closely related to the vehicle jerk, is used as a virtual system output and regulated to zero. Thereby the controller does not need a reference model for generation of reference trajectories for the control law evaluation. The properties of the controller are discussed and the behavior is illustrated by simulation examples and verified by experiments.
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| 7. |
- Templin, Peter, 1969
(author)
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Simulation and transient control of diesel engine compression brake
- 2004
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Licentiate thesis (other academic/artistic)abstract
- The recent development of sophisticated integrated powertrain control systems forheavy duty trucks, including handling of driveline oscillations and automated gear shiftingsystems, requires detailed simulation models during the development process. Thesemodels need to balance the demands for accuracy, ease of parameterization and simulationefficiency.The application in focus in this work is the transient engine speed control duringan automated gear shift sequence of a heavy duty truck. In the case of an upshift, theengine must rapidly be decelerated to the new synchronous speed. Since the normalengine friction is small, the engine compression brake is activated. A dedicated enginesimulation model is needed in order to be able to develop a controller for this sequence.This report presents a crank angle based diesel engine model, especially well suitedfor simulation and development of control strategies for the transients during automatedgear shifts in a heavy duty truck. It includes compression brake capabilities. The modelcan be characterized as a “filling and emptying”-model, using the ideal gas law andstandard equations for flow restrictions connecting lumped control volumes. An empiricalcombustion model is used, assuming adiabatic conditions in the cylinder. During no-loador when the compression brake is active, cylinder wall heat exchange is taken into account.A tuning procedure is outlined and pursued for a 12 litre turbocharged Volvo dieselengine. The simulations agree well with measurements.An example to show the usefulness of the model is given where the rapid engine speeddeceleration during an upshift is studied.
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| 8. |
- Templin, Peter, 1969
(author)
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Simultaneous estimation of driveline dynamics and backlash size for control design
- 2008
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In: 17th IEEE International Conference on Control Applications, CCA; San Antonio, TX; United States; 3 September 2008 through 5 September 2008. - 1085-1992. - 9781424422227 ; , s. 13-18
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Conference paper (peer-reviewed)abstract
- The Shunt and shuffle-phenomenon at rapid torque transients in a vehicle driveline greatly influences the drivability. A dynamic model that can describe both the traversing of the backlash and the following poorly damped oscillations is proposed. It is experimentally shown to have good predictive capability which is important for control design. The model includes backlash to avoid underestimating the oscillation amplitude after rapid large accelerator pedal movements (ldquotip-in/outrdquo). The parameter estimation results are obtained using only the existing engine torque signal and engine and vehicle speed measurements.
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