Question

multisim timestep too small

今天用multisim 10.1仿真总是遇到这样的问题：error message from simulation：doanalyses：timestep too small 不知道怎么解决。找了好多资料，论坛也看了，我把最大步长也改了，问题还是有。哪位高人帮个忙啊！！！！

Multisim Convergence Assistant Summary Report

Convergence Assistant Summary Report

Outcome:

The Convergence Assistant was unable to correct the problem. Please consult the help documentation for more information about simulation errors and how to correct them.

Multisim Convergence Assistant Log

Step 1: Verifying Error Scenario
...completed.

Step 2: Setting parameter Integration Method (METHOD) to Gear
Simulating...
...completed. Simulation error still occurs.

Step 3: Setting parameter Initial Conditions to Set To Zero
Simulating...
...completed. Simulation error still occurs.

Step 4: Setting parameter Maximum Timestep (TMAX) to 1.0000e-004
Simulating...
...completed. Simulation error still occurs.

Step 5: Setting parameter Maximum Timestep (TMAX) to 1.0000e-003
Simulating...
...completed. Simulation error still occurs.

Step 6: Setting parameter Relative error tolerance (RELTOL) to 1.0000e-002
Simulating...
...completed. Simulation error still occurs.

Step 7: Setting parameter Shunt resistance from analog nodes to ground (RSHUNT) to 1000000000
Simulating...
...completed. Simulation error still occurs.

Step 8: Setting parameter Shunt resistance from analog nodes to ground (RSHUNT) to 100000000
Simulating...
...completed. Simulation error still occurs.

Step 9: Setting parameter Shunt resistance from analog nodes to ground (RSHUNT) to 10000000
Simulating...
...completed. Simulation error still occurs.

Step 10: Setting parameter DC iteration limit (ITL1) to 200
Simulating...
...completed. Simulation error still occurs.

Step 11: Setting parameter DC iteration limit (ITL1) to 300
Simulating...
...completed. Simulation error still occurs.

Step 12: Setting parameter Minimum conductance (GMIN) to 1.0000e-007
Simulating...
...completed. Simulation error still occurs.

Step 13: Setting parameter Maximum Timestep (TMAX) to 1.0000e-004
Simulating...
...completed. Simulation error still occurs.

Step 14: Setting parameter Maximum Timestep (TMAX) to 1.0000e-005
Simulating...
...completed. Simulation error still occurs.

Convergence Assistant completed unsuccessfully.

Answer 1

错在哪里呢 求答案