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Integrated energy-oriented lateral stability control of a four-wheelindependent-drive electric vehicle

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Science China(Technological Sciences) 2019年第12期62卷 2170-2183页

作者： LIU JingXing ZHUANG WeiChao ZHONG Hong WANG LiangMo chen hejuan TAN Chin-An School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Mechanical Engineering Southeast UniversityNanjing 211189China Department of Mechanical Engineering University of MichiganAnn Arbor MI 48109USA School of Mechanical Engineering Wanjiang University of TechnologyMa'anshan 243031China Department of Mechanical Engineering Wayne State UniversityDetroit MI 48202USA

Improving the energy efficiency of an electric vehicle(EV) is an effective approach to extend its driving range. This paper proposes an integrated energy-oriented lateral stability controller(IESC) for a four-wheel independent-drive EV(4 WID-EV) to optimize its energy consumption while maintaining vehicular stability during cornering. The IESC is a hierarchical controller with two levels. The high-level decision-making controller determines the virtual control inputs, i.e., the desired additional yaw moment and total wheel torque, while the low-level controller allocates the motor torques according to the virtual control *** the high-level controller, the desired additional yaw moment is first calculated using a linear quadratic regulator(LQR) to minimize the control expenditure. Meanwhile, a stability weighting factor(SWF) based on phase plane analysis is proposed to adjust the additional yaw moment, which can reduce the additional energy consumption caused by the mismatch between the reference model and the actual vehicle. In addition to the yaw moment, the desired total wheel torque is calculated using a proportional-integral(PI) controller to track the desired longitudinal velocity. In the low-level controller, a multi-objective convex-optimization problem is established to optimize the motor torque by minimizing the energy consumption and considering the tire-road frictional limit and motor saturation. A globally optimal solution is obtained by using an active-set method. Finally,double-lane change(DLC) simulations are conducted using Car Sim and MATLAB/Simulink. The simulation results demonstrate that the proposed controller achieves great lateral stability control performance and reduces the energy consumption by5.23% and 2.95% compared with the rule-based control strategy for high-and low-friction DLC maneuvers, respectively.

关键词： four-wheel-independent-drive electric vehicle energy-oriented lateral stability torque allocation

Safety Device Virtual Design and Dynamic Analysis

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Safety Device Virtual Design and Dynamic Analysis

Study of Vehicle Real-Time Test ＆ Analysis System Based on Labview

2005国际机械工程与力学会议

作者： Hui WANG hejuan chen COSTIND key subject laboratory school of Mechanial Engineering Nanjing University of Science and Technology

The Safety device is a critical component of a projectile. The compound inertial safety device in which is a multiple input single output nonlinear system with multiple freedoms and multiple impact constraints, and its displacement response to random dynamic load presents its identification of inertial environments. The method of developing safety device in an integrated CAD/CAE environment was introduced, which was based on the new version of SolidWorks. The motion model of device was built in COSMOSMotion, a plug-in of SolidWorks. Two characteristic environments during the whole life of the objective product were selected for virtual test of the compound inertial safety device. The normalized values of displacement and acceleration response were achieved after post processing. Impacts between parts were captured during the virtual test, and the peril points were showed in result. The basic data were provided for intension analysis using finite elements analysis software and design optimization. The dynamic character of the rotor was analyzed too. The results indicated the design instance met the demands of action reliability and safety while triggering under the lower limit of launch load. Besides, the design also remained insensitive to abnormal inertial prompting.

关键词： safety device virtual design dynamic analysis inertial force

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Study of Vehicle Real-Time Test ＆ Analysis System Based on ...

第三届国际机械工程与力学会议

作者： Jianyu CAI hejuan chen School of Mechanical Engineering Nanjing University of Science & technology Nanjing College of Chemical Technology

Braking capability is a very important indicator to vehicle. This system was developed with Labview 7. It could test and analysis the brake performance of vehicle with Anti-lock Braking System （ABS） or Sensotronic Brake Control （SBC）. Analog signals of wheel cylinder’s hydraulic pressure are converted and tested by ADC, with 8 channels and 12 bits at 100 kHz. Digital signals of the wheel and the roller speed, and the braking torque are counted and measured by C/T, with 18 channels and 16 bits. According to the National Standards, the experiment method and data processing were carried through. The result shows very quick and accurate on testing and analyzing, and convenient on operation.

关键词： Braking capability Labview ABS SBC Test and Analysis System

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高速摄像测量电解液流量流速方法研究

自动化仪表 2024年第8期45卷 97-100,107页

作者：吴福凯邹睿吕能勇朱从贵郑国庆张祥金陈荷娟南京理工大学机械工程学院江苏南京210094 贵州梅岭电源有限公司贵州遵义563003 深圳市珈玛纳米技术有限公司广东深圳518102

基于武器装备军用贮备电池快速激活的战术技术要求,由于电解液的流速和流量是激活时间和电池性能的关键影响因素,提出了高速摄像测量电解液流量、流速的方法。采用混合气流体测量技术和高速摄像技术相结合的试验方法,通过高帧率相机和... 详细信息

基于武器装备军用贮备电池快速激活的战术技术要求,由于电解液的流速和流量是激活时间和电池性能的关键影响因素,提出了高速摄像测量电解液流量、流速的方法。采用混合气流体测量技术和高速摄像技术相结合的试验方法,通过高帧率相机和专用的测量容器,实时精确测量电解液推送的流速和流量,从而获取电解液在任一瞬时状态下流速和流量的精确数值。试验结果表明,相同型号的贮液器中流速和流量有明显的差异,变化的时间约为200 ms;气液混合进入测量容器后内部气体逐渐被排出,电解液推送时间约为4 s。该方法为新型军用贮备电池的研发和性能优化提供了支持。

关键词：贮备电池流量流速混合气流体测量高速摄像电解液实时精确测量

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风动压电发电机的结构设计及实验研究

压电与声光 2012年第6期34卷 860-863,867页

作者：孙加存陈荷娟南京理工大学机械工程学院江苏南京210094 苏州职业大学电子信息工程系江苏苏州215104

物体在空中飞行时,或物体静止于流动的气体中,气体相对于物体进行流动,该流动的动能可使涡轮发生转动,运用涡轮转动时产生的力迫使压电振子进行振动,进行机械能与电能的转换,产生电能,通过桥式整流电路与贮存电路把该电能存贮下来,进行... 详细信息

物体在空中飞行时,或物体静止于流动的气体中,气体相对于物体进行流动,该流动的动能可使涡轮发生转动,运用涡轮转动时产生的力迫使压电振子进行振动,进行机械能与电能的转换,产生电能,通过桥式整流电路与贮存电路把该电能存贮下来,进行稳压后给一些电路进行供电。因空气流动的频率具有不确定性,研究了压电振子在非谐振环境下产生电能的原理与特点,进行了压电振子产生的电能作为电路电源可行性验证,设计了发电机的结构,进行了模拟实验。实验结果表明,运用强迫振动的方式可保证压电振子产生电能,利用该原理制成的压电发电机,具有无污染,活动部件少,激发时间短,产品易于小型化的特点。

关键词：压电电源结构设计风致振动直流转换

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压电换能器机电转换系数研究

压电与声光 2018年第2期40卷 247-250页

作者：王根圣陈荷娟南京理工大学机械工程学院江苏南京210094

针对气流致声压电发电换能器的腔底压力与输出电压之间存在的机电转换关系,建立了谐振状态下的机电耦合模型,获得了机电转换系数解析解,通过理论机电转换系数表达式分析可得,随着换能器谐振角频率、等效质量、压电片等效电容的减小或品... 详细信息

针对气流致声压电发电换能器的腔底压力与输出电压之间存在的机电转换关系,建立了谐振状态下的机电耦合模型,获得了机电转换系数解析解,通过理论机电转换系数表达式分析可得,随着换能器谐振角频率、等效质量、压电片等效电容的减小或品质因数的增加,输出电压增加。搭建实验平台,获得模型机电转换系数。实验结果表明,机电转换系数实验值与理论值的误差为11.29%,推导的理论与实验一致,为小型气流致声压电发电系统的设计提供理论支持。

关键词：气流致声压电发电换能器机电转换系数谐振

一种有效的非线性电路及其特性的透明建模方法

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电子器件 2022年第2期45卷 338-345页

作者：陈和娟房义军无锡商业职业技术学院汽车技术学院江苏无锡214153 江苏大学农业工程学院江苏镇江212013

为了对任意非线性电路及其特性生成具有更开放函数形式的和可解释的符号模型,基于规范形式函数和多目标基因编程搜索算法提出了一种自动生成无需预先定义模板的符号模型建模方法。首先采用SPICE仿真数据对任意非线性电路及其特性进行建... 详细信息

为了对任意非线性电路及其特性生成具有更开放函数形式的和可解释的符号模型,基于规范形式函数和多目标基因编程搜索算法提出了一种自动生成无需预先定义模板的符号模型建模方法。首先采用SPICE仿真数据对任意非线性电路及其特性进行建模,得到具有规范形式的函数。然后采用基于基因编程的多目标搜索算法返回一组可能的模型,实现对模型复杂性和误差的权衡,最终实现符号模型的可解释性和准确性。仿真实验结果表明,本文提出的建模方法不仅具有可解释性,而且在建模复杂性和预测误差性能等方面,都优于目前采用的主流建模技术。

关键词：非线性电路符号建模帕累托最优规范形式函数多目标搜索复杂性预测误差

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压电发电能量转移技术与实验研究

压电与声光 2015年第1期37卷 109-112页

作者：孙加存陈荷娟南京理工大学机械工程学院江苏南京210094 苏州市职业大学电子信息工程学院江苏苏州215104

压电材料在受到周期的压力时,其表面产生周期的电压。压电材料与金属片作成压电振子,压电振子产生周期性振动,在其极面上不断激发电荷,把该电能贮存变换后作成压电发电机。研究了压电能量转移的原理,设计了压电能量转移电路,利用填谷电... 详细信息

压电材料在受到周期的压力时,其表面产生周期的电压。压电材料与金属片作成压电振子,压电振子产生周期性振动,在其极面上不断激发电荷,把该电能贮存变换后作成压电发电机。研究了压电能量转移的原理,设计了压电能量转移电路,利用填谷电路代替普通电容进行了能量贮存与转换;进行稳压电路设计,设计了实验电路,运用振动台进行了实验,通过对系统所带负载进行了实验比较测试。实验效果表明,利用填谷电路代替普通的电容可提高压电发电机的带负载能力,该能量转移电路无需额外电源。

关键词：压电电源换能转移效率填谷电路

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水中目标联合压差及时延的二元阵定位方法

探测与控制学报 2013年第6期35卷 31-35页

作者：张营陈荷娟南京理工大学机械工程学院江苏南京210094 济宁学院物理与信息工程系山东曲阜273155

针对引信在实现近距快速定位时声传感器阵列体积大的问题,提出了联合压差和时延的二元阵定位方法。二元阵定位方法采用分帧处理和广义相关法将声压差和声时差模型相结合,确定平面目标位置,随着弹丸的转动,也能判定垂直平分线上的目标位... 详细信息

针对引信在实现近距快速定位时声传感器阵列体积大的问题,提出了联合压差和时延的二元阵定位方法。二元阵定位方法采用分帧处理和广义相关法将声压差和声时差模型相结合,确定平面目标位置,随着弹丸的转动,也能判定垂直平分线上的目标位置。试验结果表明,该方法在较低混响下可获得较好的定位结果,在满足引信近距探测高灵敏度、快速响应要求基础上,有效减小了阵列体积。

关键词：引信水中目标二元阵定位声压差声时差