A Shifting Control Strategy for Hydro-mechanical Continuously Variable Transmission
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摘要: 针对一种液压机械无级变速器建立换挡仿真模型。以输出轴的速度降幅度、动载荷系数、最大冲击度和换挡时间作为换挡品质评价指标,以发动机转速、负载转矩、主油路压力和调速阀流量作为影响因素。建立L9(34)正交表,采用极差法确定影响因素各水平的主次和优劣,并预测最佳方案。使用统计学方法分析试验数据,验证仿真结果的正确性。结果表明:采用较低的发动机转速,较小的负载转矩,较小的主油路压力,以及较大的调速阀流量可有效提升变速器器换挡品质。Abstract: We build the shifting simulation model of a hydro-mechanical continuously variable transmission (HMCVT). The speed drop amplitude, dynamic load coefficient, maximum degree of shock of output shaft and shifting time are regarded as the shifting quality evaluation indices to establish the engine speed, load torque, pressure of main circuit and flow of speed control valves as factors of influence. An L9(34) orthogonal table is used to determine the primary-secondary and optimal-worst levels of influence factors and to predict the optimum scheme. The simulation datas are calculated by using a statistical method in order to verify the reliability of the simulation results, which show that the shifting quality is improved by the lower engine speed, smaller load torque, lower pressure of main circuit, and the larger flow of speed control valves.
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[1] Raikwar S, Tewari V K, Mukhopadhyay S, et al. Simulation of components of a power shuttle transmission system for an agricultural tractor[J]. Computers and Electronics in Agriculture, 2015,114:114-124 [2] 郭晓林,胡纪滨,苑士华,等.DCT系统换档品质的控制方法[J].机械科学与技术,2006,25(6):698-701,727 Guo X L, Hu J B, Yuan S H, et al. Approach to improving the shift quality of a dual clutch transmission system[J]. Mechanical Science and Technology, 2006,25(6):698-701,727 (in Chinese) [3] 刘志君,郭志强,张迎军,等.液压机械无级变速器换档品质研究[J].河南科技大学学报:自然科学版,2008,29(1):35-38 Liu Z J, Guo Z Q, Zhang Y J, et al. Research on shift quality of hydro-mechanical continuously variable transmission[J]. Journal of Henan University of Science and Technology: Natural Science, 2008,29(1):35-38 (in Chinese) [4] 王光明,朱思洪,史立新,等.拖拉机液压机械无级变速箱换段控制优化与试验[J].农业工程学报,2013,29(18):51-59 Wang G M, Zhu S H, Shi L X, et al. Experimental optimization on shift control of hydraulic mechanical continuously variable transmission for tractor[J]. Transactions of the Chinese Society of Agricultural Engineering, 2013,29(18):51-59 (in Chinese) [5] Ompusunggu A P, Sas P, Van Brussel H. Modeling and simulation of the engagement dynamics of a wet friction clutch system subjected to degradation: an application to condition monitoring and prognostics[J]. Mechatronics, 2013,23(6):700-712 [6] 朱镇,高翔,潘道远,等.液压机械无级变速器设计与试验分析[J].机械设计与研究,2015,31(2):53-56 Zhu Z, Gao X, Pan D Y, et al. Design and test analysis of HMCVT[J]. Machine Design and Research, 2015,31(2):53-56 (in Chinese) [7] 常亚磊.非道路车辆液压机械无级变速器换档过程动态特性研究[D].南京:南京农业大学,2012 Chang Y L. Research on dynamic characteristics in shifting process of hydro-mechanical continuously variable transmission used on the unroad vehicle[D]. Nanjing: Nanjing Agricultural University, 2012 (in Chinese) [8] 张迎军.拖拉机液压机械无级变速传动系统控制策略研究[D].武汉:武汉理工大学,2007 Zhang Y J. Study on the control strategy of hydro-mechanical continuously variable transmission of tractor[D]. Wuhan: Wuhan University of Technology, 2007 (in Chinese) [9] 倪向东,朱思洪,张海军,等.液压机械无级变速器换段品质影响因素试验[J].农业机械学报,2013,44(6):29-34 Ni X D, Zhu S H, Zhang H J, et al. Experiment of shift quality factors for hydro-mechanical CVT[J]. Transactions of the Chinese Society for Agricultural Machinery, 2013,44(6):29-34 (in Chinese) [10] 庄楚强,何春雄.应用数理统计基础[M].广州:华南理工大学出版社,2006 Zhuang C Q, He C X. Applied mathematical statistics[M]. Guangzhou: South China University of Technology Press, 2006 (in Chinese) [11] 颜素容,崔红新.概率统计基础二[M].2版.北京:国防工业出版社,2013 Yan S R, Cui H X. Probability statistics basis[M]. 2nd ed. Beijing: National Defense Industry Press, 2013 (in Chinese) [12] 孙荣恒.应用数理统计三[M].3版.北京:科学出版社,2016 Sun R H. Applied mathematical statistics[M]. 3rd ed. Beijing: Science Press, 2016 (in Chinese) [13] 王鹏,周志立,徐立友.拖拉机液压机械无级变速器试验台设计[J].农机化研究,2015,(3):95-98,102 Wang P, Zhou Z L, Xu L Y. Design of hydro-mechanical continuously variable transmission test bench of tractor[J]. Journal of Agricultural Mechanization Research, 2015,(3):95-98,102 (in Chinese) [14] 张敏.拖拉机HMCVT试验台测控系统研究[D]. 河南洛阳:河南科技大学,2013 Zhang M. Study on the measurement and control system of tractor HMCVT test bench[D]. Henan Luoyang: Henan University of Science and Technology, 2013 (in Chinese)
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