高速动态称重信号干扰因素及模型补偿研究

发布时间：2018-06-26 01:43

本文选题：汽车动态称重 + 轴重　；参考：《中国计量学院》2015年硕士论文

【摘要】：精度问题始终是车辆动态称重领域无法避免的核心问题。本文采用单承载器轴载荷汽车衡称量汽车重量,通过建立三维机械运动仿真模型,利用ADAMS仿真分析,结合车速、载重和振动等影响因素,实现基于速度和振动的补偿算法,在高速运动状况下提高车辆动态称重精度。具体研究内容如下:(1)车辆称重系统数据采集:称重实验采集数据,得到原始数据进行标定,采集过程满足400k Hz的AD采样速率。(2)机械仿真模型建立与验证:以实验平台和车型为三维原型,在Solid Works中建立三维汽车动态称重模型,导入ADAMS,完成约束添加和参数设置,进行运动仿真分析。对比仿真称重信号与实测称重信号,实验结果表明,在30km/h以下,仿真数值与实测数值相差不超过5%,验证动态称重模型可靠性。(3)模型速度、振动补偿:通过理论分析,对振动曲线分类,研究基于振动影响因素的补偿机制,在软件仿真中得到速度补偿因子,对称重结果进行速度补偿,最后总结得到两轴汽车轴重信号正弦半波补偿算法。结果表明,基于ADAMS的有限元动态称重模型补偿正确可靠,随着载重、车速加快,补偿效果变好,20t载重汽车在30km/h情况下最大补偿量达到10%,补偿后汽车载重与真实值偏差保持在3%左右,很大程度上减小了动态称重系统的测量偏差,提高了精度。
[Abstract]:Precision is always the core problem in the field of vehicle dynamic weighing. In this paper, the weight of a weighing vehicle with a single load-bearing axle is adopted. By establishing a three-dimensional mechanical motion simulation model and using Adams simulation analysis, combined with the influence factors such as speed, load and vibration, the compensation algorithm based on velocity and vibration is realized. The dynamic weighing accuracy of the vehicle is improved under the condition of high speed motion. The specific research contents are as follows: (1) vehicle weighing system data acquisition: weighing experiment data collection, get the original data for calibration, The acquisition process meets the AD sampling rate of 400kHz. (2) the mechanical simulation model is established and verified. Based on the experimental platform and vehicle model, the 3D vehicle dynamic weighing model is established in solid works, and the dynamic weighing model is imported into Adams to complete constraint addition and parameter setting. The motion simulation analysis is carried out. Comparing the simulated weighing signal with the measured weighing signal, the experimental results show that under 30km/h, the difference between the simulation value and the measured value is not more than 5, which verifies the reliability of the dynamic weighing model. (3) Model velocity, vibration compensation: through theoretical analysis, According to the classification of vibration curve, the compensation mechanism based on vibration influencing factors is studied. The velocity compensation factor is obtained in the software simulation, and the symmetrical weight result is used to compensate the speed. Finally, the algorithm of sinusoidal half-wave compensation for axle load signal of two-axle vehicle is summarized. The results show that the finite element dynamic weighing model based on Adams is correct and reliable. The maximum compensation amount of 20t truck under 30km/h is 10, and the deviation between vehicle load and real value is about 3% after compensation. The measurement deviation of dynamic weighing system is reduced to a great extent and the precision is improved.
【学位授予单位】：中国计量学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U492.321

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