關于舉行澳大利亞皇家墨爾本理工大學王旭教授學術報告會的通知

發布時間:2019-06-28設置

 

報告題目:Vehicle regenerative shock absorber research and development
报 告 人:王旭教授
報告時間:2019年7月7日 15:00—17:30
報告地點:機械與汽車工程學院19號樓201會議室
歡迎廣大師生參加!
 
 
機械與汽車工程學院
2019年6月28日
 
報告人簡介:
王旭,澳大利亚皇家墨尔本理工大学工程学教授,澳大利亚SAE会士,澳大利亚工程师学会会士,1995年在澳大利亚Monash  University获得工学博士学位,1988在北京航空航天大学获得工学硕士学位,1985年在天津大学获得工学学士学位。
王旭教授出版了2本专著,80余篇期刊论文和33篇会议论文,并获得了一项澳大利亚自然科學(ARC DP)科学发现基金资助、两项澳大利亚自然科學(ARC LP)工程运用基金资助、三项澳大利亚政府汽车工业合作(AUTOCRC)基金资助和一项DMTC基金项目资助。
他目前的研究專注于振動能量轉換和使用傳感器,智能材料和結構來收獲振動能量。
 
報告摘要:
Energy harvesting from the shock absorbers is now becoming an important technology in developing the electrical vehicles. Compared with other kinetic energy sources such as engine and brake systems which are continuous or periodic, the shock absorber is subjected to the fluctuated linear motion with relatively small displacement. This paper presents a novel indirect-drive regenerative shock absorber system that utilizes an arm teeth mechanism to achieve linear to rotary motion conversion and to amplify its input speed for increasing energy harvesting output. The fluctuation of road randomness can be smoothed out through the flywheel. The proposed design has the advantage of achieving all the targets with less number of components. Two prototypes of the direct-drive and indirect-drive regenerative shock absorbers have been built. The simulation models have been developed and validated by experimental results. The performance of this new indirect-drive system has been compared, through experimental testing and analytical modeling, with that of a conventional direct-drive system of the same generator configuration. The results show that this indirect-drive system can achieve greater peak power output and broader frequency bandwidth than the conventional direct-drive system. The indirect drive system also presents a better ride comfort up to 13 Hz. Using Monte Carlo simulation, a parameter sensitivity analysis of both the indirect-drive and direct-drive systems has been carried out to compare their energy harvesting performances in terms of increasing the peak power output and broadening the energy harvesting frequency bandwidth. In both the systems, choosing the right tyre stiffness and electromechanical coupling constant is beneficial to increasing the peak power output ratio and the harvesting frequency bandwidth. The right choice of the gear ratio can further improve the peak power output ratio of the indirect-drive system. The variation of these parameters will allow for possibility of achieving higher power output when vehicle is driven on random road surfaces. 
 
從減震器收集能量現在正成爲開發電動車輛的重要技術。與其他動能源如連續或周期性的發動機和制動系統相比,減震器受到顫動的線性運動和相對小的位移。本報告介紹了一種新型間接驅動再生減震器系統,該系統利用臂齒機構實現線性到旋轉運動轉換,並放大其輸入速度,以增加能量收集輸出。通過飛輪可以平滑道路隨機性的波動。所提出的設計具有以較少數量的部件實現所有目標的優點。已經建立了直驅式和間接驅動再生式減震器的兩個原型。仿真模型已經被建立並通過實驗結果驗證。
通过实验测试和分析建模,将这种新型间接驱动系统的性能与同一发电机配置的传统直接驱动系统进行了比较。结果表明,与传统的直接驱动系统相比,这种间接驱动系统可以实现更高的峰值功率输出和更宽的频率带宽。间接驱动系统还具有高达13 Hz的更好的乘坐舒适性。使用蒙特卡罗模拟仿真,对间接驱动和直接驱动系统进行了参数灵敏度分析,以便在增加峰值功率输出和扩大能量收集频率带宽方面比较它们的能量收集性能。在这两个系统中,选择合适的轮胎刚度和机电耦合常数有利于提高峰值功率输出比和收获频率带宽。正确选择齿轮比可以进一步提高间接驱动系统的峰值功率输出比。当车辆在随机路面上行驶时,这些参数的变化将允许实现更高功率输出的可能性。
 

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