IF函数写成分段函数加载到motion报错

76243386

我用IF函数写成分段函数加载到motion，载荷为velocity的时候计算报错：
ADAMS cannot solve the equations of motion because the Jacobian matrix is ill-conditioned.
The ratio of the smallest to the largest pivot elements is 7.50192E-16 .
You must increase this ratio before ADAMS can solve the equations within the desired accuracy.
The smallest pivot is 3.95173E-13 which is related to the sensitivity of the equation for JOINT MPRO_model.JOINT_31 with respect to the variable GEAR MPRO_model.GEAR_3 .
The largest pivot is 526.76 which is related to the sensitivity of the equation for PART MPRO_model.WOGAN_GEAR_TUIJIN with respect to the variable PART MPRO_model.WOGAN_GEAR_TUIJIN .
Try the following in this order:
1. Remove any HMAX arguments from the INTEGRATOR command and issue a new SIMULATE command with a smaller value for the STEPS argument.
2.Temporarily increase the value of the ERROR argument on the INTEGRATOR command at time = 0.0 .
3.Rescale the model using larger units.
而将载荷类型改为displacement时则可以计算，不知道是什么原因，求大侠解释！

76243386

这个问题已经解决了，同样的函数，我将软件换成2012版完全没有任何报错！