共查询到20条相似文献,搜索用时 453 毫秒
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针对液压再生制动系统的能量回收效率和制动安全性问题,对汽车液压再生制动系统的参数匹配进行了研究。建立了液压制动能量回收系统试验台,进行了蓄能器初始压力变化、系统最高压力变化、蓄能器总体积变化的实验研究;建立了液压再生制动系统试验台数学模型,基于Matlab/Simulink建立了液压制动能量回收系统的仿真模型,并进行了与台架相对应的仿真实验,研究了液压制动能量回收系统的能量回收效率;对液压制动能量回收系统进行了整车研究,采用ADAMS/car建立了某车型整车,并与Matlab进行了仿真研究。首先研究了液压制动能量回收系统单因素对能量回收效率和制动安全性的综合影响,其次采用正交实验法研究了多因素对能量回收和制动安全性的综合影响。研究结果表明,合理的液压制动能量回收系统参数能够显著提高能量回收效率和制动安全性。 相似文献
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针对原矿用重型铲运机液压制动系统制动响应慢、制动器易磨损等问题,以55 t矿用重型铲运机为例,对原液压制动系统进行改进设计,并利用AMESim仿真平台对改进后的液压制动系统进行仿真,通过对改进后的液压制动系统实测数据和仿真结果基本一致,满足设计和使用要求。实践证明改进设计后液压制动系统的性能良好,解决了原系统存在问题。 相似文献
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阐述了风力发电机组液压制动系统的工作原理,针对兆瓦级风力发电机组对液压制动系统的高集成化、高可靠性的要求,对液压制动系统进行深入研究探讨;针对现场实际应用中容易出现的问题进行了分析,并提出相应的解决方案。 相似文献
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Ning Li Xiaobin Ning Qiucheng Wang Jiliang Li 《Journal of Mechanical Science and Technology》2017,31(6):2691-2699
To obtain a reasonable match of the main parameters of a hydraulic regenerative braking system and to improve the energy recovery efficiency, this paper establishes the corresponding mathematical models and testbed for a hydraulic regenerative braking system. The proposed system is analysed and verified through simulation and experiments. Then, the linear and nonlinear mathematical models of a full vehicle are built, with joint simulation of the hydraulic regenerative braking system, and the influence of the hydraulic regenerative braking system on braking performance under different running conditions is discussed. The results indicate that the deviations in the simulation results between the linear and nonlinear dynamic models are very small. When the brake deceleration and road adhesion coefficient are 0.2, deviations are within 1.38 %. With an increase in the braking deceleration and road adhesion coefficient, the deviations in braking time and distance between the systems become larger and larger. When the braking deceleration and road adhesion coefficient are 0.7, the deviation reaches 30 %. Finally, with braking energy recovery efficiency and braking distance as the optimization objectives, the nonlinear braking energy recovery system parameters are optimized. After optimization, the energy recovery efficiency of the nonlinear system reaches 76.3 %, and the braking distance is 22.8 m. 相似文献
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液力减速器叶栅系统优化及制动动力学仿真 总被引:3,自引:0,他引:3
液力减速器是高速、重载车辆必备的辅助制动器,具有高速制动力矩大、无机械磨损等优点,特别适合车辆下长坡及高速减速用.叶栅系统决定液力减速器的性能.文中在经验设计的基础上,结合多岛遗传算法进行了叶栅系统的优化,开发了虚拟样机,最后将液力减速器加入整车传动系统进行了制动性能仿真.仿真结果表明,优化后的液力减速器具有良好的制动性能,拓展了车辆的制动范围,为液力减速器的研制奠定了基础. 相似文献
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Sungwook Jang Hoon Yeo Chulsoo Kim Hyunsoo Kim 《Journal of Mechanical Science and Technology》2001,15(11):1490-1498
In this paper, a regenerative braking algorithm is presented and performance of a hybrid electric vehicle (HEV) is investigated. The regenerative braking algorithm calculates the available regenerative braking torque by considering the motor characteristics, the battery SOC and the CVT speed ratio. When the regenerative braking and the friction braking are applied simultaneously, the friction braking torque corresponding to the regenerative braking should be reduced by decreasing the hydraulic pressure at the front wheel. To implement the regenerative braking algorithm, a hydraulic braking module is designed. In addition, the HEV powertrain models including the internal combustion engine, electric motor, battery, CVT and the regenerative braking system are obtained using AMESim, and the regenerative braking performance is investigated by the simulation. Simulation results show that the proposed regenerative braking algorithm contributes to increasing the battery SOC which results in the improved fuel economy. To verify the regenerative braking algorithm, an experimental study is performed. It is found from the experimental results that the regenerative braking hydraulic module developed in this study generates the desired front wheel hydraulic pressure specified by the regenerative braking control algorithm. 相似文献
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该文阐述了目前叉车所采用的制动方式,重点阐明全动力液压制动系统的原理、组成和此制动方式所具有的优势和存在的不足。介绍了优化现有液压制动系统的方法、改进后可满足5~10t叉车制动的HXQA蓄能器和制动阀OBV-L25E,提供了可用于重载叉车上全动力液压制动的系统方式和主要元件的选择。 相似文献
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针对蓄电池轨道工程车制动性能的不足设计了一套液压再生制动系统,在车辆原底架结构基础上与原制动系统共同作用形成了一套复合制动系统。为探究复合制动系统制动、能量回收和缓速的有效性,对电液轨道车下坡纯摩擦制动的能力进行了理论计算,并利用AMESim和MATLAB/Simulink建立的液压系统模型对复合制动过程进行仿真运算。仿真结果表明:复合制动方式能大大提高下坡制动性能同时回收制动能量;在高速工况下制动时,马达变排量控制方式能够提高液压再生制动扭矩,从而减少制动距离和磨损。复合制动系统能有效地调节轨道车下坡速度,保证车辆安全性。 相似文献