AMT执行机构多轴向多激励道路模拟试验方法研究

摘要

AMT执行机构的振动疲劳可靠性是AMT最重要的性能之一，为对AMT执行机构的振动疲劳可靠性进行准确高效的分析和评价，提出了基于时频域误差加权远程参数方阵控制（RPC）的AMT执行机构多轴向多激励道路模拟试验方法。针对轿车AMT建立了其道路载荷谱采集方法，在东风汽车试验场采集了AMT及其执行机构实际道路行驶振动载荷谱，并对载荷谱进行了预处理和重复性检验，获取了AMT执行机构室内道路模拟试验期望响应信号。针对AMT执行机构实际道路行驶时的振动受载特征，设计开发了AMT执行机构多轴道路模拟试验台，结合采集的实际道路行驶载荷谱和开发的AMT执行机构多轴道路模拟试验台，采用时域和频域误差加权系数均为0．5的远程参数方阵控制（RPC）载荷谱模拟迭代方法在室内准确高效地再现了AMT执行机构实际行驶载荷谱，从而建立了AMT执行机构多轴向多激励道路模拟试验方法，为室内准确高效考核轿车AMT执行机构振动疲劳可靠性提供了一种行之有效的手段和方法。%Vibration fatigue reliability of AMT actuator is one of the most significant performance of AMT.For accurate and efficient analysis and evaluation of AMT actuator vibration fatigue reliabili-ty,multi-axial multi-excitations road simulation test method for AMT actuator based on time-fre-quency domain error-weighted remote parameter square matrix control (RPC)was put forward. AMT actual road load spectra acquisition method was established and AMT actuator actual driving road load spectra were col ected in Dongfeng automobile testing field.The col ected load spectra were conducted with pretreatment and repeatability inspection and thus expected response sig-nals for indoor road simulation test were obtained.AMT multi-axes road simulation test bench was designed and developed based on the AMT actuator actual road vibration load characteristics. Combined with the col ected real road load spectra and developed AMT actuator multi-axes road simulation test bench,load spectrum simulation iteration method based on remote parameter square matrix control with time-frequency domain error weighting coefficients 0.5 respectively succeeded in achieving accurate and efficient reproducing of AMT actuator actual driving road load spectra,therefore muti-axial multi-excitations road simulation test method for AMT actuator was established and thus provided an accurate and efficient new method for vehicle AMT actuator vibration fatigue reliability assessment.