基于模型的动力传动系统负载循环构建方法  

Model Based Construction Method for Duty Cycle of Power-Train

作　　者：崔涛[1] 牛广泽 王天翔 刘春生[2] CUI Tao;NIU Guangze;WANG Tianxiang;LIU Chunsheng(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中国北方车辆研究所,北京100072

出　　处：《北京理工大学学报》2025年第4期367-376,共10页Transactions of Beijing Institute of Technology

摘　　要：为解决动力传动系统的传统稳态试验工况同实车工况契合度不高、无法反映实车运行状态的问题,提出了一种履带车辆动力传动系统负载循环构建方法,搭建了整车动力传动系统模型.根据行驶数据计算道路阻力矩,以其表征行驶过程中道路状况变化.参考路面不平度表征方法,提出了基于空间频率下的阻力矩频谱分析方法,并得到阻力矩功率谱密度特征.采用K均值聚类和马尔可夫方法,对阻力矩变化特征进行泛化重构,生成新的负载循环.通过综合传动试验台对所构建的负载循环进行验证.对比实车试验数据与台架数据,转速−油量、车速−挡位联合概率分布误差分别为1.5%、1.2%;通过调整惩罚因子生成新的负载循环,可实现车速、油耗、发动机转速等参数台架测试,表明循环构建方法具有一定泛化能力.To handle the low consistency existed between the actual conditions and steady-state test of the powertrain in tracked vehicles,and to reflect the operational status in real scenarios,a construction method was proposed for the duty cycle of tracked vehicles power-train.Firstly,establishing a power-train model and calculating resistance torque based on driving data,the method was arranged therewith to characterize the variations in road conditions.And then,referencing the road spectrum,a spectral analysis method was put forward based on spatial frequency,and the power spectrum characteristics of the resistance torque in typical regions were extracted.And the variation characteristics of the road resistance were reconstructed by K-means clustering and Markov chain to generate new duty cycles.Finally,the constructed load cycle was verified based on an integrated power-train test bench.Comparing the actual vehicle test data with duty cycle 1 test data,the errors of the joint probability distribution of engine speed-fuel and vehicle speed-gear are 1.5%and 1.2%respectively.Adjusting penalty factor,the generated duty cycles can carry out the bench test for vehicle speed,fuel consumption,engine speed,and so on,indicating the applicability of the proposed method.

关 键 词：履带车辆 动力传动系统 负载循环 空间频率 均值聚类 马尔可夫链 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]