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An MPC-based manoeuvre stability controller for full drive-by-wire vehicles

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Control Theory and Technology 2019年第4期17卷 357-366页

作者： Ping WANG Ziyang liu qifang liu Hong CHEN The State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun Jilin 130025China Department of Control Science and Engineering School of Communication EngineeringJilin UniversityChangchun Jilin 130025China

Aiming at the actuator time delay caused by the drive-by-wire technology,a novel manoeuvre stability controller based on model predictive control is proposed for full drive-by-wire ***,the future vehicle dynamics are predicted by a twodegree-of-freedom vehicle model with input ***,in order to prevent the vehicle from destabilizing due to excessive side slip angles,the determined ideal yaw rate and side slip angle are tracked simultaneously by optimizing the front wheel angle and additional yaw ***,in order to improve the trajectory tracking ability,a side slip angle constraint determined by phase plane stability boundaries is added to the cost *** results of Matlab and veDYNA co-simulation show that the regulated yaw rate can track the reference value well and the side slip angle ***,the trajectory tracking ability is improved obviously by compensating the time delay.

关键词： Drive-by-wire technology networked control system model predictive control stability control time delay

Introduction to the benchmark challenge on common rail pressure control of gasoline direct injection engines

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Control Theory and Technology 2019年第2期17卷 167-175页

作者： qifang liu Jinlong HONG Bingzhao GAO Hong CHEN State Key Laboratory of Automotive Simulation and Control Changchun Jilin 130025China Department of Control Science and Engineering Jilin UniversityChangchun Jilin 130025China

As one of the most important actuators for gasoline direct injection technology,common rail systems provide the requested rail pressure for fuel *** system characteristics,such as coupled discrete-continuous dynamic in the common rail system,limited measurable states,and time-varying engine operating conditions,impel the combination of advanced methods to obtain the desired injection ***,reducing the pressure fluctuation and satisfying engineering implementation have become noteworthy issues for rail pressure control(RPC)*** this study,the benchmark problem and the design specification of RPC proposed by 2018 IFAC E-CoSM Committee are ***,a common rail system model is provided to the challengers,and a traditional PI control is applied to show the problem ***,intermediate results of the challengers are summarized briefly.

关键词： Common rail pressure control gasoline direct injection engine control system design benchmark challenge

Real-time energy-efficient anticipative driving control of connected and automated hybrid electric vehicles

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Control Theory and Technology 2022年第2期20卷 210-220页

作者： Shiying Dong Hong Chen Lulu Guo qifang liu Bingzhao Gao State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025JilinChina Department of Control Science and Engineering Jilin UniversityChangchun 130025JilinChina Department of Control Science and Engineering Tongji UniversityShanghai 200092China Clean Energy Automotive Engineering Center Tongji UniversityShanghai 200092China

In this paper,we propose a real-time energy-efficient anticipative driving control strategy for connected and automated hybrid electric vehicles(HEVs).Considering the inherent complexities brought about by the velocity profile optimization and energy management control,a hierarchical control architecture in the model predictive control(MPC)framework is developed for real-time *** the higher level controller,a novel velocity optimization problem is proposed to realize safe and energy-efficient anticipative *** real-time control actions are derived through a computationally efficient *** the lower level controller,an explicit solution of the optimal torque split ratio and gear shift schedule is introduced for following the optimal velocity profile obtained from the higher level *** comparative simulation results demonstrate that the proposed strategy can achieve approximately 13%fuel consumption saving compared with a benchmark strategy.

关键词： Connected and automated vehicle Hybrid electric vehicle Anticipative driving Hierarchical control architecture Real-time solution

Energy management of HEVs based on velocity profile optimization

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Science China(Information Sciences) 2019年第8期62卷 204-206页

作者： Lulu GUO Hong CHEN Bingzhao GAO qifang liu State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University (Campus NanLing)

Dear editor,Ecological awareness and economical reasons call for a substantial reduction of the fuel consumption of all future automobiles. One of the most realistic short-term solutions to energy saving is represented by hybrid electric vehicles (HEVs). Those strategies that determine power distribution within the hybrid powertrain, as well as the gearshift

关键词： EMS profile Energy management of HEVs based on velocity profile optimization

Fuel Injection Quantity Fluctuation Analysis and Compensation Control for Multiple Injections of Common Rail System 36

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Fuel Injection Quantity Fluctuation Analysis and Compensatio...

Preliminary analysis of the hanging wall effect and velocity pulse of the 5.12 Wenchuan earthquake

第36届中国控制会议

作者： Liang Zhang qifang liu Hong Chen Xiaohui Lu State Key Laboratory of Automotive Simulation and Control

ISBN: (纸本)9781538629185

To solve the inaccurate injection quantity problem in multiple injections of high pressure common rail injection system,in this paper,a simulation model of the system is developed in AMESim environment,and the injection quantity fluctuation characteristics with respect to the dwell time between consecutive injections and pilot injection quantity are *** results show that injection quantity fluctuates periodically and the fluctuation range attenuates gradually with increasing dwell *** addition,under the same main injection,the fluctuation amplitude of the fuel injection quantity increases with the increase of pilot injection ***,the influence of rail pressure on fuel injection quantity fluctuation is also ***,a fuel compensation control strategy based on map for multiple injections is designed which can improve the injection control effectively.

关键词： High pressure common rail Multiple injections Injection quantity fluctuation characteristic Injection control strategy Injection quantity compensation

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Earthquake Engineering and Engineering Vibration 2009年第2期8卷 165-177页

作者： liu qifang and Li Xiaojun Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China Associate Professor Professor Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China Institute of Engineering Mechanics China Earthquake Administration 9 Xuefu Road Harbin 150080 China

A preliminary study of the PGA attenuation, hanging wall effect and velocity pulse characteristics from the 2008 Wenchuan earthquake ofMS -8.0 is described in this paper. The study was carried out through analyses in the time and frequency domains of main earthquake records. In the PGA attenuation study, records from 316 stations less than 1000 km from the surface rupture of the fault were used as a database and attenuation relationships were developed and compared with some existing relationships that are widely used in China's Mainland, Chinese Taiwan and the US. At the same time, records from 28 stations less than 100 km from the fault were used to study the hanging wall effect and velocity pulse characteristics of this earthquake based on the distribution of PGA, PGV, spectral acceleration, and the velocity pulse peak, and the results are compared with the 1999 Chi-Chi earthquake. In addition, the large PGAs of the UD components observed in this event are also discussed in this paper. From the results of the preliminary study, some conclusions are developed and suggestions for further research are proposed.

关键词： Wenchuan earthquake hanging wall effect velocity pulse attenuation

2014年鲁甸地震龙头山镇盆地共振效应研究

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地震工程与工程振动 2021年第2期41卷 43-52页

作者：刘启方苏州科技大学江苏省结构工程重点实验室江苏苏州215009

2014年的云南鲁甸县M W 6.1级地震中,位于震中的龙头山镇遭受了严重的破坏,烈度达IX度。文中基于钻孔和地形资料建立的二维场地模型,并利用显式有限元方法分析了SV波作用下场地放大效应。模型由一个狭长浅盆地和位于其下方由强风化白云... 详细信息

2014年的云南鲁甸县M W 6.1级地震中,位于震中的龙头山镇遭受了严重的破坏,烈度达IX度。文中基于钻孔和地形资料建立的二维场地模型,并利用显式有限元方法分析了SV波作用下场地放大效应。模型由一个狭长浅盆地和位于其下方由强风化白云质灰岩构成的深盆地组成。研究表明,当仅考虑狭长浅盆地或一维土层模型时,龙头山镇结构倒塌和严重破坏区域地震动放大与该区域的台站53LLT观测的放大频带差别甚大。考虑深盆地的影响时,这一区域的振动以自振频率为2.2 Hz的二维盆地共振为主,共振频率与台站处观测到的放大频带更为接近,共振显著地放大了该区域的地震动,增长了地震动持续时间。盆地共振效应可能是导致该区域结构倒塌和严重破坏的一个主要原因。

关键词：鲁甸地震龙头山镇场地效应盆地共振效应

SV和SH波垂直入射下二维盆地-子盆地共振对比研究

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地震工程与工程振动 2024年第3期44卷 146-156页

作者：刘昇刘启方苏州科技大学江苏省结构工程重点实验室江苏苏州215009

盆地-子盆地中的子盆地除了底部直达的入射体波外,还存在大盆地产生的横向传播的面波入射,导致子盆地共振特性的变化。基于显式有限元法,对比分析了SH波和SV波垂直入射下,子盆地基底阻抗比、大盆地倾角和半宽对二维梯形盆地-子盆地的二... 详细信息

盆地-子盆地中的子盆地除了底部直达的入射体波外,还存在大盆地产生的横向传播的面波入射,导致子盆地共振特性的变化。基于显式有限元法,对比分析了SH波和SV波垂直入射下,子盆地基底阻抗比、大盆地倾角和半宽对二维梯形盆地-子盆地的二维共振频率及其对应放大系数的影响。研究表明:受大盆地产生的横向传播面波的影响,子盆地的速度峰值PGV和累积能量Ex最大值均有明显放大,且SV波入射下的放大系数大于SH波;子盆地基底阻抗比对盆地-子盆地的PGV最大值、Ex最大值、二维共振频率及其对应放大系数影响较大,大盆地倾角和半宽的影响不大。SV波和SH波入射下子盆地二维共振频率较单一小盆地均有所增加,且同阻抗比下SV波入射的增幅大于SH波。SH波入射下二维共振频率下的放大系数基本大于单一小盆地,而SV波在低阻抗比下低于单一小盆地,高阻抗比下高于单一小盆地和SH波入射下的结果。SV波入射下盆地-子盆地的二维共振频率及其对应放大系数受大盆地的影响较SH波更大。

关键词：盆地-子盆地显式有限元法二维盆地共振阻抗比

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近断层强地震动预测的一些基本问题讨论

世界地震工程 2008年第3期24卷 94-100页

作者：刘启方哈尔滨工程大学黑龙江哈尔滨150001

近断层地震动的预测是当前地震工程中的一个关键科学问题。对预测中涉及的震源和三维地下结构建模、格林函数的计算和预测方法等基本问题做了探讨。分析了震源模型中全局和局部震源参数,给出一套震源建模方案;通过各种格林函数的对比分... 详细信息

近断层地震动的预测是当前地震工程中的一个关键科学问题。对预测中涉及的震源和三维地下结构建模、格林函数的计算和预测方法等基本问题做了探讨。分析了震源模型中全局和局部震源参数,给出一套震源建模方案;通过各种格林函数的对比分析,指出宽频带格林函数法是当前近断层地震动预测中最合适的方法。对近断层场地非线性分析的一些问题也进行了讨论。

关键词：近断层强地震动预测震源模型格林函数