Jiangyan Zhang

An Adaptive Servo Control Strategy for Automotive Electronic Throttle and Experimental Validation

In order to achieve higher precise positioning of the throttle plate, an adaptive servo control strategy is presented for the electronic throttle control system. Compared with the existing results on the electronic throttle control schemes, in this paper, the throttle valve reference tracking controller comprises a proportional-integral-derivative-type feedback controller with adaptive gain parameters, an adaptive feedforward compensator, and adaptive nonlinearity compensators for friction, limp-home (LH), and backlash. The closed-loop controller is realized by only utilizing the information of the throttle valve position measured by a cheap potentiometer of low resolution. The theoretical proof and analysis show that the designed throttle control system can ensure fast and accurate reference tracking of the valve plate angle in the case of the uncertain parameters related to production deviations, variations of external conditions and aging, and the effects of transmission friction, return-spring LH, and gear backlash nonlinearity with uncertain parameters. Moreover, the capability of the adaptive controller to preserve the transient performance and accuracy is evaluated in both simulation and experiment.

Model-based Cold-start Speed Control Design for SI Engines

Abstract This paper presents a feedback deign approach to the cold-start speed control for spark ignition engines. First, in order to ensure successful combustion in the transient mode, a fuel injection controller is given based on the air charge estimation with inverse dynamics of fuel path, which is a dual sampling rate system, i.e. the estimation for the air charge is performed TDC-based, and the fuel injection command is delivered cycle-based, respectively. Then, a speed control scheme is proposed that provides a coordination between the spark advance and the throttle operation. A supervisor is exploited to management the multi-control laws. Finally, simulation results will be demonstrated which are carried out on a full scale 6-cylinder engine system simulator provided by the SICE benchmark problem.

Real-Time Fuel Economy Optimization With Nonlinear MPC for PHEVs

This brief addresses the energy management problem with the framework of receding horizon optimization. For power-split plug-in hybrid electric vehicles (HEVs), the real-time power-split decision is formulated as a nonlinear receding horizon optimization problem. Then, an online iterative algorithm to solve the optimization problem is proposed based on the continuation/generalized minimum residual algorithm. It should be noted that the proposed energy management strategy aims for optimality of the targeted horizon, but the solution is not optimal for the full driving route, unlike many solutions presented using the dynamic programming approaches. At each decision step, only the initial value of the optimal solution is implemented according to the receding horizon optimization approach. Finally, to demonstrate a comparison of the proposed scheme with other schemes, numerical validations conducted on a full-scale GT-SUITE HEV simulator are presented.

Functional differential inclusion-based approach to control of discontinuous nonlinear systems with time delay

This paper presents functional differential inclusion based approach to investigate the stabilization of discontinuous nonlinear systems with time delay. First, the conception of Filippov solution for ordinary differential equations with discontinuous right-hand side is extended to discontinuous systems with time delay, which is a solution of functional differential inclusions determined by the Filippov set-valued functional. With this conception and the strong stability, it is shown that the Lyapunov stability framework can be easily extended to discontinuous systems with time delay. Then, the feedback stabilization problem for a class of discontinuous nonlinear systems with time delay is investigated with the proposed functional differential inclusion-based framework. It is shown that for the systems, a stabilization controller can be provided by a by means of a system-related function satisfying HJI inequality. Finally, to demonstrate the design process of the proposed approach, an application example with automotive system background is addressed.

L 2 -gain analysis and feedback design for discontinuous time-delay systems based on functional differential inclusion

A functional differential inclusion-based approach to L2-gain analysis and feedback control problems is presented for a class of discontinuous time-delay systems. Motivated by Filippov solution in the differential equations with discontinuous right-hand side, definition of the discontinuous time-delay systems forced by external signals is introduced, and a description of L2-gain property in the sense of the solution concept is given. Then, a condition such that a given discontinuous time-delay system has L2-gain less than a given level and the unforced system is stable in the sense of Filippov solution is presented based on a delay-dependent partial differential inequality. Furthermore, using the presented condition, a design method of state feedback controller is shown such that the closed-loop system satisfies the L2-gain constraint and asymptotical stability. Numerical examples are presented to demonstrate the presented theoretical results.

Adaptive idling control scheme and its experimental validation for gasoline engines

In this paper, the idle speed control problem is investigated for spark-ignition (SI) engines. To scope with physical model parameter-free control scheme, a nonlinear adaptive control law is proposed for the speed regulation loop. The stability analysis result shows that the idle speed converges to the set value and the estimated parameter converges to an equivalent static value of the intake manifold. Furthermore, the proposed fuel injection control law consists of a feedforward and a simple feedback loop. Finally, the proposed control scheme is validated based on a full-scaled six-cylinder gasoline engine test bench.创新点本文研究火花点火式发动机的怠速控制问题。对发动机速度调节问题, 提出了不依赖任何物理模型参数的控制方案。稳定性分析结果证明了速度收敛于设定值, 并且参数估计收敛于进气歧管的等价状态值。同时, 文中还提出了由前馈及简单反馈回路构成的燃油喷射控制率。最终, 通过在一个由六缸发动机构建的实时控制实验台架上实施的实验验证了所提出方案的有效性。

Nonlinear MPC-based power-assist scheme of internal combustion engines in plug-in hybrid electric vehicles

Power optimal control of plug-in hybrid electric vehicles (PHEVs) is a considerable issue due to the promising technology of PHEVs comparing with the other hybrid electric vehicles (HEVs). A case study that focuses on the power-assist operation by the internal combustion engine in the plug-in hybrid electric vehicle (PHEV) system is investigated. A formulation for the fuel economy optimal control problem is presented. A new nonlinear MPC method that uses the Continuous/GMRES algorithm is proposed to solve the optimal control problem. Besides the constraint condition of the dynamics of the battery state of charge (SoC), as far as the driving pattern of the driver is concerned, the vehicle velocity dynamics is also taken as the constraint condition of the predictive-based optimal control problem. The developed control scheme is implemented on a power-split hybrid electric vehicle (HEV) simulator constructed based on the JSAE-SICE benchmark problem. Using a driving scenario and a real-world driving cycle, simulation studies are conducted to evaluate the nonlinear MPC algorithm.

Challenges and solutions in automotive powertrain systems

Automotive powertrain mainly consisting of combustion engine, motor and battery (i.e. special for hybrid powertrain) is a very complicated integration system, and the research on the automotive pow...

Model-based starting transient speed control scheme for automotive engines

The main objective of this paper is to present a model-based starting control scheme and the experimental validations for the spark ignition (SI) engines. The control scheme targets smooth and quick engine speed response during the starting stage. Specifically, the control scheme consists of the fuel injection control loop and the speed regulation loop. For the fuel control, an observer-based estimation is used to get the air charge for each cylinder. With the estimation, individual injection command is attained from the dynamical model of fuel path. The speed regulation is conducted by event-based coordinative feedback control with spark advance (SA) and throttle opening. Validation experiments carried out on a commercial car-used engine test bench demonstrate that the design method guarantees the specifications of a starting speed control benchmark problem.

Feedback stabilization of a class of time-delay systems with discontinuity: A functional differential inclusion-based approach

In this paper, a feedback stabilization approach is proposed for a class of time-delay systems with discontinuity based on functional differential inclusions. By extending the differential inclusion in the sense of Filippov to functional differential inclusion, a notion of the solution for time-delay systems with discontinuity is presented that is defined satisfying the proposed Filippov set-valued functional. With this notion, it is shown that both the Lyapunov-Krasovskii stability theorem and the LaSalle invariance principle can be easily extended to discuss the stability problem of time-delay systems with discontinuity. Based on the introduced analysis tools, it is proved that a feedback stabilization controller can be obtained for a class of nonlinear time-delay systems with discontinuity such that the closed loop system is strongly asymptotically stable. Simulation result of a numerical example is given to demonstrate the proposed control approach.