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[讨论] ADS仿真中出现的不收敛情况如何解决

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qcb99
发表于 2010-8-4 18:49:14 | 显示全部楼层 |阅读模式
<img src="attachments/dvbbs/2010-8/20108418265873499.jpg" border="0" onclick="zoom(this)" onload="if(this.width>document.body.clientWidth*0.5) {this.resized=true;this.width=document.body.clientWidth*0.5;this.style.cursor='pointer';} else {this.onclick=null}" alt="" />


这是我仿真用的图，底下是仿真结果。。

Simulation / Synthesis Messages

Error detected by hpeesofsim during HB analysis `HB1'.
    No convergence.
Error detected by hpeesofsim during HB analysis `HB1'.
    Max. number of Newton iterations reached.
    Convergence hints:
    o Increase max. iterations to 100.
    o Select the Robust convergence mode,
    o Select the Fast convergence mode.
    o Select the direct solver.
    o Set Matrix Re-use to Robust.
    o Select the Krylov solver.
    o Increase Krylov Restart Length to 150.
    This is the maximum value based on available memory.
    o Try TAHB (transient assisted HB).
    o Try to sweep a parameter.
    o Decrease MaxStepRatio.

Status / Summary


hpeesofsim (*) 2008.500 Jan 22 2008 (built: 01/22/08 22:02:45)
Copyright Agilent Technologies, 1989-2008.
Message from hpeesofsim during netlist flattening.
    Booting of Freescale RF High Power Library v2005ap0806 was successful!

CT Sweep2[1] <E:\users\default\MRF21030_prj\networks\HB1Tone_LoadPull>   imag_indexs11=(-318.182e-03->318.182e-03)

HB Sweep2[1].HB1[1/10] <E:\users\default\MRF21030_prj\networks\HB1Tone_LoadPull>  imag_indexs11=-318.182e-03  real_indexs11=(-795.809e-03->-504.191e-03)
    Number of tones:   1.
    Number of frequencies:   10.
    Number of time samples:  32.
    Number of HB equations (problem size): 912.
    Auto mode: on.
    Convergence mode: Auto.
    Linear solver: direct.
    real_indexs11=-795.809e-03   0.00% 1/10*.......
    real_indexs11=-763.407e-03  11.11% 2/10......
    real_indexs11=-731.005e-03  22.22% 3/10......
    real_indexs11=-698.603e-03  33.33% 4/10......
    real_indexs11=-666.201e-03  44.44% 5/10......
    real_indexs11=-633.799e-03  55.56% 6/10......
    real_indexs11=-601.397e-03  66.67% 7/10......
    real_indexs11=-568.995e-03  77.78% 8/10......
    real_indexs11=-536.593e-03  88.89% 9/10......
    real_indexs11=-504.191e-03 100.00% 10/10......


HB Sweep2[1].HB1[2/10] <E:\users\default\MRF21030_prj\networks\HB1Tone_LoadPull>  imag_indexs11=-247.475e-03  real_indexs11=(-897.5e-03->-402.5e-03)
    real_indexs11=-897.5e-03     0.00% 1/10*............
    real_indexs11=-842.5e-03    11.11% 2/10........
    real_indexs11=-787.5e-03    22.22% 3/10.......
    real_indexs11=-732.5e-03    33.33% 4/10.......
    real_indexs11=-677.5e-03    44.44% 5/10.......
    real_indexs11=-622.5e-03    55.56% 6/10.......
    real_indexs11=-567.5e-03    66.67% 7/10.......
    real_indexs11=-512.5e-03    77.78% 8/10........
    real_indexs11=-457.5e-03    88.89% 9/10........
    real_indexs11=-402.5e-03   100.00% 10/10........


HB Sweep2[1].HB1[3/10] <E:\users\default\MRF21030_prj\networks\HB1Tone_LoadPull>  imag_indexs11=-176.768e-03  real_indexs11=(-952.081e-03->-347.919e-03)
    real_indexs11=-952.081e-03   0.00% 1/10*.................
    real_indexs11=-884.952e-03  11.11% 2/10..........
    real_indexs11=-817.823e-03  22.22% 3/10........
    real_indexs11=-750.694e-03  33.33% 4/10........
    real_indexs11=-683.565e-03  44.44% 5/10........
    real_indexs11=-616.435e-03  55.56% 6/10.........
    real_indexs11=-549.306e-03  66.67% 7/10.........
    real_indexs11=-482.177e-03  77.78% 8/10.........
    real_indexs11=-415.048e-03  88.89% 9/10..........
    real_indexs11=-347.919e-03 100.00% 10/10..........


HB Sweep2[1].HB1[4/10] <E:\users\default\MRF21030_prj\networks\HB1Tone_LoadPull>  imag_indexs11=-106.061e-03  real_indexs11=(-983.543e-03->-316.457e-03)
    real_indexs11=-983.543e-03   0.00% 1/10****...........
    real_indexs11=-909.423e-03  11.11% 2/10..*........
    real_indexs11=-835.302e-03  22.22% 3/10.............
    real_indexs11=-761.181e-03  33.33% 4/10.........
    real_indexs11=-687.06e-03   44.44% 5/10..........
    real_indexs11=-612.94e-03   55.56% 6/10...........
    real_indexs11=-538.819e-03  66.67% 7/10............
    real_indexs11=-464.698e-03  77.78% 8/10............
    real_indexs11=-390.577e-03  88.89% 9/10............
    real_indexs11=-316.457e-03 100.00% 10/10...........


HB Sweep2[1].HB1[5/10] <E:\users\default\MRF21030_prj\networks\HB1Tone_LoadPull>  imag_indexs11=-35.3535e-03  real_indexs11=(-998.21e-03->-301.79e-03)
    real_indexs11=-998.21e-03    0.00% 1/10****
    Switching to arc-length continuation...
Fwd sourceLevel=19.9499e-03    1.99% 2/2  Step=0.5*....    Arclength Newton-Raphson converged at 0.020301 in 1 iters

Fwd sourceLevel=48.3096e-03    4.83% 2/2  Step=0.7071067812*....    Arclength Newton-Raphson converged at 0.0485403 in 1 iters

Fwd sourceLevel=86.9096e-03    8.69% 2/2  Step=1*....    Arclength Newton-Raphson converged at 0.0866633 in 1 iters

Fwd sourceLevel=137.337e-03   13.73% 2/2  Step=1.414213562*.....    Arclength Newton-Raphson converged at 0.136341 in 1 iters

Fwd sourceLevel=201.274e-03   20.13% 2/2  Step=2*.....    Arclength Newton-Raphson converged at 0.199776 in 1 iters

Fwd sourceLevel=282.613e-03   28.26% 2/2  Step=2.828427125*.....    Arclength Newton-Raphson converged at 0.281072 in 1 iters

Fwd sourceLevel=388.757e-03   38.88% 2/2  Step=4*.....    Arclength Newton-Raphson converged at 0.386962 in 1 iters

Fwd sourceLevel=530.581e-03   53.06% 2/2  Step=5.656854249*......    Arclength Newton-Raphson converged at 0.525712 in 1 iters

Fwd sourceLevel=717.842e-03   71.78% 2/2  Step=8*.........    Arclength Newton-Raphson converged at 0.692415 in 1 iters

Fwd sourceLevel=900.155e-03   90.02% 2/2  Step=11.3137085*    rejected

Fwd sourceLevel=791.339e-03   79.13% 2/2  Step=5.387480238*............    Arclength Newton-Raphson converged at 0.762344 in 1 iters

Fwd sourceLevel=817.428e-03   81.74% 2/2  Step=5.387480238*..............    Arclength Newton-Raphson converged at 0.793004 in 1 iters

Fwd sourceLevel=827.638e-03   82.76% 2/2  Step=7.619047619*.....................    Arclength Newton-Raphson converged at 0.822882 in 1 iters

Fwd sourceLevel=889.548e-03   88.95% 2/2  Step=10.77496048*.****..*.....................*....................    Arclength Newton-Raphson converged at 0.932545 in 7 iters

Fwd sourceLevel=976.451e-03   97.65% 2/2  Step=2.693740119*.*************************************************    rejected

Fwd sourceLevel=953.452e-03   95.35% 2/2  Step=1.28273339*.*************************************************    rejected

Fwd sourceLevel=942.501e-03   94.25% 2/2  Step=0.6108254238*.*********************************************    Arclength Newton-Raphson converged at 0.941811 in 46 iters
Fwd sourceLevel=944.35e-03    94.43% 2/2  Step=0.1527063559*.*****************************************    Arclength Newton-Raphson converged at 0.944171 in 42 iters

Fwd sourceLevel=944.809e-03   94.48% 2/2  Step=0.03817658899*.*************************************    Arclength Newton-Raphson converged at 0.944764 in 38 iters

Fwd sourceLevel=944.923e-03   94.49% 2/2  Step=0.009544147246*.********************************    Arclength Newton-Raphson converged at 0.944912 in 33 iters

Fwd sourceLevel=944.952e-03   94.50% 2/2  Step=0.002386036812*.***************************    Arclength Newton-Raphson converged at 0.944949 in 28 iters

Fwd sourceLevel=944.959e-03   94.50% 2/2  Step=0.0005965092029*.**********************    Arclength Newton-Raphson converged at 0.944958 in 23 iters

Fwd sourceLevel=944.961e-03   94.50% 2/2  Step=0.0001491273007*.******************    Arclength Newton-Raphson converged at 0.944961 in 19 iters

Fwd sourceLevel=944.961e-03   94.50% 2/2  Step=3.728182518e-005*.*************    Arclength Newton-Raphson converged at 0.944961 in 14 iters

--------------------------
Solver convergence summary:
--------------------------
RHS:
3.182e-008 A at node X1.MRF1.MRF1.a, harmonic index (7)
3.182e-008 A at node X1.MRF1.MRF1.a, harmonic index (7)
2.942e-008 A at node X1.MRF1.MRF1.a, harmonic index (9)

Update:
3.226e-008 V at node X1.MRF1.MRF1.a, harmonic index (1)
3.208e-008 V at node X1.MRF1.MRF1.a, harmonic index (1)
3.203e-008 V at node X1.MRF1._net20, harmonic index (1)

Solution:
28         V at node _net159, harmonic index (0)
28         V at node Vs_high, harmonic index (0)
28         V at node _net117, harmonic index (0)
--------------------------


-------------------------------------------------------------------------------
Simulation finished with errors.
-------------------------------------------------------------------------------

Resource usage:
    Total stopwatch time: 1.49 seconds.
--------------------
Simulation terminated due to error.
--------------------


为什么会出现不收敛的情况，要怎么修改。。谢谢

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发表于 2010-8-5 19:10:46 | 显示全部楼层
你可以用DATASHEET上的那个阻抗点做圆心，扫描半径设小一些，点稀疏些，看能不能收敛，可以，再改变扫描半径和点数，逐渐逼近一个最好的值

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lanyichengshu
恩  发表于 2015-12-21 15:55
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qcb99
 楼主| 发表于 2010-8-5 18:38:13 | 显示全部楼层
以下是引用keithwoo在2010-8-5 14:55:27的发言：
30W的管子阻抗应该不小，按道理不太会出现这种情况，除了ADS提示的几个选择外，你可以试试下面几种方式
1.改变扫描范围和扫描点数，扫描点尽量规避阻抗点很小的区域
2.扫描功率不要太大，稍微超过P1db就够了，功率太大也会引起不收敛。
3.谐波仿真器中阶数降下来，5阶3阶都试试。



1.扫描范围和扫描点数要如何确定？有什么原则啊。不然我可以把范围设大一点，不是都能包括进来了吗？为什么要合理设置？有什么好处啊？

谢谢！！
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发表于 2010-8-5 18:21:37 | 显示全部楼层
把源阻抗设成50试试

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lanyichengshu
可以试一试  发表于 2015-12-21 15:55
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发表于 2010-8-5 14:55:27 | 显示全部楼层
30W的管子阻抗应该不小，按道理不太会出现这种情况，除了ADS提示的几个选择外，你可以试试下面几种方式
1.改变扫描范围和扫描点数，扫描点尽量规避阻抗点很小的区域
2.扫描功率不要太大，稍微超过P1db就够了，功率太大也会引起不收敛。
3.谐波仿真器中阶数降下来，5阶3阶都试试。
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发表于 2015-12-14 09:38:43 | 显示全部楼层
你们在接着讨论啊，各位打什么，我看着呢，
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发表于 2015-12-14 09:39:27 | 显示全部楼层
各位大神，打错字了
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发表于 2015-12-21 15:56:39 | 显示全部楼层
每一次搜索这个相关的问题，都会跳出来你们的聊天，可见你们的聊天是多么的强大啊
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