Robust control of electrified turbocharged diesel engines

Zhao, Dezong; Winward, Edward; Yang, Zhijia; Stobart, Richard; Steffen, Thomas

doi:10.1109/cdc.2016.7798355

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The key of downsizing is to reduce emissions while increasing power. The most important component to achieve this downsizing is the turbocharger or supercharger, otherwise known as forced induction systems (FIS) [1,2]. Turbochargers are driven by exhaust gases as they leave the engine.…”

Section: Introductionmentioning

confidence: 99%

Rotor Design, Analysis and Experimental Validation of a High-Speed Permanent Magnet Synchronous Motor for Electric Turbocharger

Lee

Hong

2022

IEEE Access

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We developed a high-speed surface mounted permanent magnet synchronous motor (SPMSM) and a pulse width modulation (PWM)-driven inverter for a turbocharger with an additional electrically driven compressor (TEDC). These systems operate at 70,000 rpm and are intended to fit 1.6L diesel vehicles to reduce turbo lag to within 0.4 sec. There are key issues in the design of rotors for SPM type machines. To prevent the PM from scattering during high-speed operation, a retaining sleeve is necessary in the rotor. Several studies have reported on rotor design and the effect of retaining sleeve materials, but no papers have applied appropriate modeling and analysis to composite material sleeves. In this study, a specialized tool was used to obtain accurate results for a composite material sleeve. The results of theoretical analyses and finite element analyses (FEA) of rotors with metallic and composite sleeves were compared, considering various stress sources such as interference fit, centrifugal force and temperature gradient. In addition, rotor dynamics and transient response analyses were performed using the proposed models to verify structural stability and response time. The proposed rotor was assembled with the stator and tested in connection with the 1.6L diesel engine. It was confirmed that the transient acceleration performance was improved by 49.14%.

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Section: Introductionmentioning

confidence: 99%

Rotor Design, Analysis and Experimental Validation of a High-Speed Permanent Magnet Synchronous Motor for Electric Turbocharger

Lee

Hong

2022

IEEE Access

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“…In [31], a 3I3O decoupling control method is demonstrated. In [32], a loop-shaping-based 3I3O robust control method is introduced. However, the general method for selecting control variables is still untouched.…”

Section: Introductionmentioning

confidence: 99%

Characterisation, control, and energy management of electrified turbocharged diesel engines

Zhao

Winward

Yang

et al. 2017

Energy Conversion and Management

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The electrification of engine components offers significant opportunities for fuel efficiency improvements. The electrified turbocharger is one of the most attractive options since it recovers part of the engine exhaust gas mechanical energy to assist boosting. Therefore, the engine can be downsized through improved transient responsiveness. In the electrified turbocharger, an electric machine is mounted on the turbine shaft and changes the air system dynamics, so characterisation of the new layout is essential. A systematic control solution is required to manage energy flows in the hybrid system. In this paper, a framework for characterisation, control, and energy management for an electrified turbocharged diesel engine is proposed. The impacts of the electric machine on fuel economy and air system variables are analysed. Based on the characterisation, a two-level control structure is proposed. A real-time energy management strategy is employed as the supervisory level controller to generate the optimal values of critical variables, while a model-based multi-variable controller is designed as the low level controller to track the values. The two controllers work together in a cascade to address both fuel economy optimisation and battery state-of-charge maintenance. The proposed control strategy is validated on a high fidelity physical engine model. The tracking performance shows the proposed framework is a promising solution in regulating the behavior of electrified engines. Electrified turbocharged diesel engines, energy management, real-time optimisation, multi-variable control 2 Highlights• A real-time energy management framework for electrified engines is proposed.• A multi-variable robust controller is designed.• Characterisation on the air system of electrified diesel engines is given.• Reliable for engine downsizing because of the promising transient performance.

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Performance comparison of structured H ∞ based looptune and LQR for a 4-DOF robotic manipulator

Asghar¹,

Iqbal

Khaliq

et al. 2022

PLoS ONE

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We explore looptune, a MATLAB-based structured H ∞ synthesis technique in the context of robotics. Position control of a 4 Degree of Freedom (DOF) serial robotic manipulator developed using Simulink is the problem under consideration. Three full state feedback control systems were developed, analyzed and compared for both steady-state and transient performance using the Linear Quadratic Regulator (LQR) and looptune. Initially, a single gain feedback controller was synthesized using LQR. This system was then modified by augmenting the state feedback controller with Proportional Integral (PI) and Integral regulators, thereby creating a second and third control system respectively. In both the second and third control systems, the LQR synthesized gain and additional gains were further tuned using looptune to achieve improvement in performance. The second and third systems were also compared in terms of tracking a time-dependent trajectory. Finally, the LQR and looptune synthesized controllers were tested for robustness by simultaneously increasing the mass of each manipulator link. In comparison to LQR, the second system consisting of Single Input Single Output (SISO) PI controllers and the state feedback matrix succeeded in meeting the control objectives in terms of performance, optimality, trajectory tracking, and robustness. The third system did not improve performance in contrast to LQR, but still showed robustness under mass variation. In conclusion, our results have shown looptune to have a comparatively better performance over LQR thereby highlighting its promising potential for future emerging control system applications.

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Robust control of electrified turbocharged diesel engines

Cited by 3 publications

References 20 publications

Rotor Design, Analysis and Experimental Validation of a High-Speed Permanent Magnet Synchronous Motor for Electric Turbocharger

Rotor Design, Analysis and Experimental Validation of a High-Speed Permanent Magnet Synchronous Motor for Electric Turbocharger

Characterisation, control, and energy management of electrified turbocharged diesel engines

Performance comparison of structured H ∞ based looptune and LQR for a 4-DOF robotic manipulator

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