共查询到20条相似文献,搜索用时 78 毫秒
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邢潇杨俭袁天辰宋瑞刚 《计算机仿真》2016,(5):223-228
针对矿用绞车下降过程中电制动产生的能量回收利用的问题,提出了一种超级电容回收电制动能量的方法,并且分析了不同载重下绞车能量回收系统的回收效率。首先对超级电容回收系统进行建模,然后结合电机矢量控制的建模,最后通过MATLAB/Simulink软件建立绞车回收系统的仿真模型。仿真出绞车在三种不同的载重下回收的能量,并计算出每种载重下的回收效率,仿真和计算结果表明:绞车能量回收系统回收的能量和回收效率随着负载的增大而增大。仿真结果表明,改进方法为矿用绞车电制动能量回收系统设计提供了科学依据。 相似文献
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为了提高续驶里程,针对某款越野车改装的电动汽车制动系统,提出一种基于ABS的电-液并联制动系统。此系统采用固定比例的前后轴制动力分配方式,结合恒定充电电流与最大回馈功率复合的再生制动控制方式,以基于滑移率的PID控制ABS系统来调节电、液制动力比例,在确保制动安全可靠的同时实现制动能量回收。根据上述理论建立数学模型,并利用AMESim和Simulink进行联合仿真,在3种典型工况下分析制动性能和能量回收效率。结果表明:基于ABS的电-液并联制动系统综合制动性能良好,且3种工况下的一次制动最小能量回收效率分别达到28%、28%和11%。 相似文献
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张重阳 《自动化技术与应用》2015,34(7)
超级电容直流电源系统是一种新型电源,具有容量大、结构简单、便于携带、支持大电流充放电、循环寿命长、低温特性好、智能化以及环保无污染等优点,可以有效的解决铅酸电池带来的环境污染以及需长期维护等问题,可以广泛地生产普及,因此在新能源、交通运输、工业等领域有着重大的生产实践意义和广阔的应用前景. 相似文献
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利用ANSYS/LS-DYNA分析软件对某电动自行车鼓式制动器进行瞬态动力学仿真,以非等载荷数组施加于与领蹄、从蹄相连的摩擦衬片,模拟制动过程中制动鼓和摩擦衬片的应力分布,并以摩擦衬片为研究对象,从材质、厚度、起始角三方面对制动器进行结构改进,为电动自行车鼓式制动器设计软件的开发提供数据参考。 相似文献
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在介绍三电平中点钳位型逆变器SVPWM控制策略基础上,本文结合DSP和FPGA各自的优点,设计了基于FPGA和DSP的中点钳位型三电平逆变器。并对SVPWM的控制策略进行了实验研究,得出了相电压、线电压和电流波形,实验结果表明了三电平NPC逆变器SVPWM方法的有效性。 相似文献
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Neural network sliding mode control based on on-line identification for electric vehicle with ultracapacitor-battery hybrid power 总被引:1,自引:0,他引:1
Jian-Bo Cao Bing-Gang Cao 《International Journal of Control, Automation and Systems》2009,7(3):409-418
In order to deal with three major problems of electric vehicle (EV): the short driving range, the short life of batteries,
and the poor ability of start-up, a hybrid power system was designed and applied to the EV. It was composed of an ultracapacitor
with high-specific power and long life, four lead-acid batteries, and a bi-directional DC/DC converter. To improve the stability
and reliability of the hybrid-power EV, based on establishing the mathematical models of driving and regenerative-braking
processes, a novel neural network sliding mode controller (NNSMC) was researched and designed for the EV. The controller comprises
a back propagation neural network (BPNN), a radial basis function neural network (RBFNN), and a sliding mode controller (SMC).
The BPNN is used to adaptively adjust the switching gain of the SMC on-line so as to avoid the whippings. The RBFNN is used
to perform system identification and parameter prediction. The experimental results show that the NNSMC is superior to PID
controller at response speed, steady-state tracking error and resisting perturbation whenever driving or braking. Additionally,
the hybrid-power EV with NNSMC can improve the ability of start-up, recover more energy, lengthen the life of batteries, and
increase the driving range than the EV using batteries as its single power source by about 40%, and than the hybrid-power
EV with PID controller by about 4%.
Recommended by Editorial Board member Naira Hovakimyan under the direction of Editor Hyun Seok Yang. This work was supported
by the National Innovation Funding of China (06C26216100555).
Jian-Bo Cao received the B.S. degree in Mechanical Engineering from Dalian Jiaotong University in 2003 and the Ph.D. degree in Mechanical
Engineering from Xi’an Jiaotong University in 2008. He is currently working at Transportation College, Zhejiang Normal University.
His research interests include electric vehicle, hybrid power, and intelligent control.
Bing-Gang Cao received the B.S., M.S., and Ph.D. degrees in Mechanical Engineering from Xi’an Jiaotong University in 1976, 1982, and 1992
respectively. He is currently a Professor at School of Mechanical Engineering, Xi’an Jiaotong University, where he is also
the Director of Research & Development Center of Electric Vehicle. His research interests include robust control, intelligent
control of electric vehicle, noise and vibration control of liquid system, control technology of renewable energy. 相似文献
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在分析逆变器空间矢量脉宽调制(SVPWM)原理的基础上,利用MATLAB S函数编制的仿真程序对SVPWM算法进行仿真。仿真结果表明该算法的正确性、可行性及基于M文件S函数仿真模型的方便性和有效性。 相似文献
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本文中,针对逆变器电气传动的电磁噪音及谐波造成的振动,设计了一种采用随机开关频率PWM(RFPWM)技术的逆变器。通过运用PSIM工具进行了仿真,仿真结果表明逆变器的输出谐波频谱均匀随机分布。因此,通过本文设计的RFPWM方式,可获得较小的可听噪声和机械振动。仿真的结果表明电压的谐波被扩展到宽频带区域内,从而使宽频带噪声较小,且比窄频带噪声干扰小。 相似文献
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