Tielong Shen - Academia.edu (original) (raw)

Papers by Tielong Shen

Research paper thumbnail of Air Path Dynamics Control and Efficiency Optimization with Scenario Approach for Gasoline Engines

International Journal of Automotive Engineering, 2019

Research paper thumbnail of Transient control of gasoline engines with C/GMRES

2015 European Control Conference (ECC), 2015

The oil crisis and strict emission legislation have greatly motivated the development of internal... more The oil crisis and strict emission legislation have greatly motivated the development of internal combustion engine technology. To improve fuel economy performance and reduce emissions, engine transient control has attracted wide research interests. However, engine system is a nonlinear physical plant with constraints on itself and actuators, and also it is a sophisticated control system involving many control loops to achieve single or multiple objectives. Therefore it is really a challenging issue on the transient control of the engine. In recent years, receding horizon control (RHC) was gained much attention in the field of engine control, owing to its advantages that it can explicitly tackle the constrained optimization and multi-variable control problem. However, a remarkable drawback of RHC is the heavy computation load for on-line optimization algorithm, especially for the nonlinear control system. Indeed, this bottleneck restricts its practical implementation on the industrial electronic controller of a fast control system for a long time. This tutorial paper proposes a systematic receding horizon controller design approach for the transient control applications of the gasoline engines. Two independent RHC-based tracking controllers aimed to achieve the engine torque and speed tracking control are designed, respectively. The control oriented model is derived from the mean-value model of gasoline engines, meanwhile the integrator of the tracking error is embedded to improve the tracking accuracy. All the proposed controllers are verified in real-time on a full-scale gasoline engine and the on-line optimization algorithm for RHC adopts C/GMRES method, which can provide an approximately optimal solution by solving the linear equation instead of the Riccati differential equation. The experimental results demonstrate a large potential for improving the engine transient control performance with RHC scheme.

Research paper thumbnail of EV bus system control strategy design with consideration of battery lifetime model

2012 10th International Power & Energy Conference (IPEC)

Research paper thumbnail of Passivity and Adaptive Control of Nonlinear Systems

IEEJ Transactions on Electronics, Information and Systems

Research paper thumbnail of A Nonlinear Control Scheme for the Traction Problem in EVs with Unknown Parameters

Journal of Asian Electric Vehicles

Research paper thumbnail of He ion implantation induced He bubbles and hardness in tungsten

Nuclear Materials and Energy

Research paper thumbnail of Input Constrained Positioning Control for a Class of Euler-Lagrange Systems with Discontinuities

IEEJ Transactions on Electronics, Information and Systems

Research paper thumbnail of Design and Validation of a Model-Based Starting Speed Control Scheme for Spark Ignition Engines

Asian Journal of Control

ABSTRACT The main objective of this paper is to present the design and experimental validations o... more ABSTRACT The main objective of this paper is to present the design and experimental validations of a model-based control scheme, which aims at smooth and fast response for spark ignition (SI) engines during the starting phase. The control scheme consists of the fuel injection control loop and the speed regulation loop. As far as the fuel control is concerned, an observer-based estimation scheme is designed which includes the air charge estimation for each cylinder: this estimation is needed to generate the individual injection command by inverting the dynamical model of fuel path. The speed regulation is achieved by an event-based coordinated feedback control of spark advance (SA) and throttle opening: the convergence analysis is shown by using the Lyapunov–Krasovskiii stability theorem for time-delay systems. The control scheme proposed formerly by the authors, which was only tested by simulations, is redesigned and recalibrated to meet the robustness specifications which were violated in experiments. The redesigned controller is found to be satisfactory in extensive experimental tests.

Research paper thumbnail of State feedback stabilization of cascaded nonlinear systems with discontinuous connection

Journal of Control Theory and Applications

In practical engineering, many phenomena are described as a discontinuous function of a state var... more In practical engineering, many phenomena are described as a discontinuous function of a state variable, and the discontinuity is usually the main reason for the degradation of the control performance. For example, in the set-point control problem of mechanical systems, the static friction (described by a sgn function of velocity of the contacting faces) causes undesired positioning error. In this paper, we will investigate the stabilization problem for a class of nonlinear systems that consist of two subsystems with cascaded connection.We will show the basic idea with a special case first, and then the result will be extended to more general cases. Some interesting numerical examples will be given to demonstrate the effectiveness of the proposed design approach.

Research paper thumbnail of Adaptive Feedback Stabilization for a Class of Cascaded Nonlinear Systems with Discontinuous Connection

SICE Journal of Control, Measurement, and System Integration

Research paper thumbnail of Periodic time-varying model-based predictive control with input constraints for air-fuel ratio control in IC engines

International Journal of Powertrains

Research paper thumbnail of In-cylinder pressure-based air-fuel ratio control for lean burn operation mode of SI engines

Research paper thumbnail of New approaching condition for sliding mode control design with Lipschitz switching surface

Science in China Series F: Information Sciences

Research paper thumbnail of Introduction to the Benchmark Challenge on SICE Engine Start Control Problem

Research paper thumbnail of Nonlinear Speed Control of Spark-Ignition Engine with Electrical Power Generation

IFAC Proceedings Volumes

... Index Terms engine speed control,feedforward control,L2-gain disturbance rejection. Abstract ... more ... Index Terms engine speed control,feedforward control,L2-gain disturbance rejection. Abstract In this paper, the speed control for the spark-ignition (SI) engine with power generation is studied. ... In: Proceedings of the 38th Conference on Decision & Control Phoenix, Arizona USA. ...

Research paper thumbnail of Cyclic moving average control approach to cylinder pressure and its experimental validation

Journal of Control Theory and Applications

Cyclic variability is a factor adversely affecting engine performance. In this paper a cyclic mov... more Cyclic variability is a factor adversely affecting engine performance. In this paper a cyclic moving average regulation approach to cylinder pressure at top dead center (TDC) is proposed, where the ignition time is adopted as the control input. The dynamics from ignition time to the moving average index is described by ARMA model. With this model, a one-step ahead prediction-based minimum variance controller (MVC) is developed for regulation. The performance of the proposed controller is illustrated by experiments with a commercial car engine and experimental results show that the controller has a reliable effect on index regulation when the engine works under different fuel injection strategies, load changing and throttle opening disturbance.

Research paper thumbnail of Backstepping Design for Robust Stabilizing Control of Nonlinear Systems with Time-Delay

Research paper thumbnail of Air-fuel ratio control with stochastic L 2 disturbance attenuation in gasoline engines

Journal of Control Theory and Applications

ABSTRACT In this paper, the problem of stochastic L 2 disturbance attenuation of the air-fuel rat... more ABSTRACT In this paper, the problem of stochastic L 2 disturbance attenuation of the air-fuel ratio is investigated with consideration of cyclic variation of the residual gas fraction (RGF). A stochastic robust controller is designed based on a discrete-time dynamic model in which the RGF is modeled as a stochastic process with Markovian property. Finally, the sampling process-based statistical analysis for the RGF and the validation of the proposed control law are presented through the experiments conducted on a gasoline engine test bench.

Research paper thumbnail of Irradiation-induced grain growth in nanocrystalline reduced activation ferrite/martensite steel

Applied Physics Letters

ABSTRACT In this work, we investigate the microstructure evolution of surface-nanocrystallized re... more ABSTRACT In this work, we investigate the microstructure evolution of surface-nanocrystallized reduced activation ferrite/martensite steels upon high-dose helium ion irradiation (24.3 dpa). We report a significant irradiation-induced grain growth in the irradiated buried layer at a depth of 300–500 nm, rather than at the peak damage region (at a depth of ∼840 nm). This phenomenon can be explained by the thermal spike model: minimization of the grain boundary (GB) curvature resulting from atomic diffusion in the cascade center near GBs.

Research paper thumbnail of Adaptive Robust Stabilization of Cascaded Nonlinear Systems with Uncertain Time-Delay

IEEJ Transactions on Electronics, Information and Systems

Research paper thumbnail of Air Path Dynamics Control and Efficiency Optimization with Scenario Approach for Gasoline Engines

International Journal of Automotive Engineering, 2019

Research paper thumbnail of Transient control of gasoline engines with C/GMRES

2015 European Control Conference (ECC), 2015

The oil crisis and strict emission legislation have greatly motivated the development of internal... more The oil crisis and strict emission legislation have greatly motivated the development of internal combustion engine technology. To improve fuel economy performance and reduce emissions, engine transient control has attracted wide research interests. However, engine system is a nonlinear physical plant with constraints on itself and actuators, and also it is a sophisticated control system involving many control loops to achieve single or multiple objectives. Therefore it is really a challenging issue on the transient control of the engine. In recent years, receding horizon control (RHC) was gained much attention in the field of engine control, owing to its advantages that it can explicitly tackle the constrained optimization and multi-variable control problem. However, a remarkable drawback of RHC is the heavy computation load for on-line optimization algorithm, especially for the nonlinear control system. Indeed, this bottleneck restricts its practical implementation on the industrial electronic controller of a fast control system for a long time. This tutorial paper proposes a systematic receding horizon controller design approach for the transient control applications of the gasoline engines. Two independent RHC-based tracking controllers aimed to achieve the engine torque and speed tracking control are designed, respectively. The control oriented model is derived from the mean-value model of gasoline engines, meanwhile the integrator of the tracking error is embedded to improve the tracking accuracy. All the proposed controllers are verified in real-time on a full-scale gasoline engine and the on-line optimization algorithm for RHC adopts C/GMRES method, which can provide an approximately optimal solution by solving the linear equation instead of the Riccati differential equation. The experimental results demonstrate a large potential for improving the engine transient control performance with RHC scheme.

Research paper thumbnail of EV bus system control strategy design with consideration of battery lifetime model

2012 10th International Power & Energy Conference (IPEC)

Research paper thumbnail of Passivity and Adaptive Control of Nonlinear Systems

IEEJ Transactions on Electronics, Information and Systems

Research paper thumbnail of A Nonlinear Control Scheme for the Traction Problem in EVs with Unknown Parameters

Journal of Asian Electric Vehicles

Research paper thumbnail of He ion implantation induced He bubbles and hardness in tungsten

Nuclear Materials and Energy

Research paper thumbnail of Input Constrained Positioning Control for a Class of Euler-Lagrange Systems with Discontinuities

IEEJ Transactions on Electronics, Information and Systems

Research paper thumbnail of Design and Validation of a Model-Based Starting Speed Control Scheme for Spark Ignition Engines

Asian Journal of Control

ABSTRACT The main objective of this paper is to present the design and experimental validations o... more ABSTRACT The main objective of this paper is to present the design and experimental validations of a model-based control scheme, which aims at smooth and fast response for spark ignition (SI) engines during the starting phase. The control scheme consists of the fuel injection control loop and the speed regulation loop. As far as the fuel control is concerned, an observer-based estimation scheme is designed which includes the air charge estimation for each cylinder: this estimation is needed to generate the individual injection command by inverting the dynamical model of fuel path. The speed regulation is achieved by an event-based coordinated feedback control of spark advance (SA) and throttle opening: the convergence analysis is shown by using the Lyapunov–Krasovskiii stability theorem for time-delay systems. The control scheme proposed formerly by the authors, which was only tested by simulations, is redesigned and recalibrated to meet the robustness specifications which were violated in experiments. The redesigned controller is found to be satisfactory in extensive experimental tests.

Research paper thumbnail of State feedback stabilization of cascaded nonlinear systems with discontinuous connection

Journal of Control Theory and Applications

In practical engineering, many phenomena are described as a discontinuous function of a state var... more In practical engineering, many phenomena are described as a discontinuous function of a state variable, and the discontinuity is usually the main reason for the degradation of the control performance. For example, in the set-point control problem of mechanical systems, the static friction (described by a sgn function of velocity of the contacting faces) causes undesired positioning error. In this paper, we will investigate the stabilization problem for a class of nonlinear systems that consist of two subsystems with cascaded connection.We will show the basic idea with a special case first, and then the result will be extended to more general cases. Some interesting numerical examples will be given to demonstrate the effectiveness of the proposed design approach.

Research paper thumbnail of Adaptive Feedback Stabilization for a Class of Cascaded Nonlinear Systems with Discontinuous Connection

SICE Journal of Control, Measurement, and System Integration

Research paper thumbnail of Periodic time-varying model-based predictive control with input constraints for air-fuel ratio control in IC engines

International Journal of Powertrains

Research paper thumbnail of In-cylinder pressure-based air-fuel ratio control for lean burn operation mode of SI engines

Research paper thumbnail of New approaching condition for sliding mode control design with Lipschitz switching surface

Science in China Series F: Information Sciences

Research paper thumbnail of Introduction to the Benchmark Challenge on SICE Engine Start Control Problem

Research paper thumbnail of Nonlinear Speed Control of Spark-Ignition Engine with Electrical Power Generation

IFAC Proceedings Volumes

... Index Terms engine speed control,feedforward control,L2-gain disturbance rejection. Abstract ... more ... Index Terms engine speed control,feedforward control,L2-gain disturbance rejection. Abstract In this paper, the speed control for the spark-ignition (SI) engine with power generation is studied. ... In: Proceedings of the 38th Conference on Decision & Control Phoenix, Arizona USA. ...

Research paper thumbnail of Cyclic moving average control approach to cylinder pressure and its experimental validation

Journal of Control Theory and Applications

Cyclic variability is a factor adversely affecting engine performance. In this paper a cyclic mov... more Cyclic variability is a factor adversely affecting engine performance. In this paper a cyclic moving average regulation approach to cylinder pressure at top dead center (TDC) is proposed, where the ignition time is adopted as the control input. The dynamics from ignition time to the moving average index is described by ARMA model. With this model, a one-step ahead prediction-based minimum variance controller (MVC) is developed for regulation. The performance of the proposed controller is illustrated by experiments with a commercial car engine and experimental results show that the controller has a reliable effect on index regulation when the engine works under different fuel injection strategies, load changing and throttle opening disturbance.

Research paper thumbnail of Backstepping Design for Robust Stabilizing Control of Nonlinear Systems with Time-Delay

Research paper thumbnail of Air-fuel ratio control with stochastic L 2 disturbance attenuation in gasoline engines

Journal of Control Theory and Applications

ABSTRACT In this paper, the problem of stochastic L 2 disturbance attenuation of the air-fuel rat... more ABSTRACT In this paper, the problem of stochastic L 2 disturbance attenuation of the air-fuel ratio is investigated with consideration of cyclic variation of the residual gas fraction (RGF). A stochastic robust controller is designed based on a discrete-time dynamic model in which the RGF is modeled as a stochastic process with Markovian property. Finally, the sampling process-based statistical analysis for the RGF and the validation of the proposed control law are presented through the experiments conducted on a gasoline engine test bench.

Research paper thumbnail of Irradiation-induced grain growth in nanocrystalline reduced activation ferrite/martensite steel

Applied Physics Letters

ABSTRACT In this work, we investigate the microstructure evolution of surface-nanocrystallized re... more ABSTRACT In this work, we investigate the microstructure evolution of surface-nanocrystallized reduced activation ferrite/martensite steels upon high-dose helium ion irradiation (24.3 dpa). We report a significant irradiation-induced grain growth in the irradiated buried layer at a depth of 300–500 nm, rather than at the peak damage region (at a depth of ∼840 nm). This phenomenon can be explained by the thermal spike model: minimization of the grain boundary (GB) curvature resulting from atomic diffusion in the cascade center near GBs.

Research paper thumbnail of Adaptive Robust Stabilization of Cascaded Nonlinear Systems with Uncertain Time-Delay

IEEJ Transactions on Electronics, Information and Systems