<div dir="ltr"><div dir="ltr">On Sun, Sep 27, 2020 at 6:27 AM 周 远清 <<a href="mailto:zhouyuanqing8@outlook.com">zhouyuanqing8@outlook.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif;background-color:rgb(255,255,255);display:inline">Hi everyone,</span><br>
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif;background-color:rgb(255,255,255);display:inline"><br>
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif;background-color:rgb(255,255,255);display:inline"> For the parameters of the following table, does the PID code of openbmc have a clearer transfer function corresponding
to this table? By adjusting the following parameters, fancontrol has taken effect. I set 5000 rpm, but the fan will change back and forth between 4500-5500. The change in this range is still relatively large. If there is a transfer function, the adjustment
will be more accurate and faster.</span></div>
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<a href="https://github.com/openbmc/phosphor-pid-control/blob/master/configure.md" id="gmail-m_-6430746694988440840LPlnk" target="_blank">https://github.com/openbmc/phosphor-pid-control/blob/master/configure.md</a><br>
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<div id="gmail-m_-6430746694988440840LPBorder_GTaHR0cHM6Ly9naXRodWIuY29tL29wZW5ibWMvcGhvc3Bob3ItcGlkLWNvbnRyb2wvYmxvYi9tYXN0ZXIvY29uZmlndXJlLm1k" style="width:100%;margin-top:16px;margin-bottom:16px;max-width:800px;min-width:424px">
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<a id="gmail-m_-6430746694988440840LPImageAnchor771081" href="https://github.com/openbmc/phosphor-pid-control/blob/master/configure.md" target="_blank"><img id="gmail-m_-6430746694988440840LPThumbnailImageId771081" alt="" height="160" style="display: block;" width="160" src="https://avatars3.githubusercontent.com/u/13670043?s=400&v=4"></a></div>
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<div id="gmail-m_-6430746694988440840LPTitle771081" style="font-size:21px;font-weight:300;margin-right:8px;font-family:wf_segoe-ui_light,"Segoe UI Light","Segoe WP Light","Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px">
<a id="gmail-m_-6430746694988440840LPUrlAnchor771081" href="https://github.com/openbmc/phosphor-pid-control/blob/master/configure.md" style="text-decoration:none" target="_blank">openbmc/phosphor-pid-control</a></div>
<div id="gmail-m_-6430746694988440840LPDescription771081" style="font-size:14px;max-height:100px;color:rgb(102,102,102);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif;margin-bottom:12px;margin-right:8px;overflow:hidden">
OpenBMC PID-based Thermal Control Daemon. Contribute to openbmc/phosphor-pid-control development by creating an account on GitHub.</div>
<div id="gmail-m_-6430746694988440840LPMetadata771081" style="font-size:14px;font-weight:400;color:rgb(166,166,166);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif">
<a href="http://github.com" target="_blank">github.com</a></div>
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<table style="box-sizing:border-box;border-spacing:0px;border-collapse:collapse;margin-top:0px;margin-bottom:16px;display:block;width:max-content;max-width:100%;overflow:auto;color:rgb(36,41,46);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";font-weight:normal">
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<th style="box-sizing:border-box;padding:6px 13px;font-weight:600;border:1px solid rgb(223,226,229)">
field</th>
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type</th>
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meaning</th>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">samplePeriod</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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How frequently the value is sampled. 0.1 for fans, 1.0 for temperatures.</td>
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<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">proportionalCoeff</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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The proportional coefficient.</td>
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<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">integralCoeff</code></td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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The integral coefficient.</td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">feedFwdOffsetCoeff</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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The feed forward offset coefficient.</td>
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<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">feedFwdGainCoeff</code></td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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The feed forward gain coefficient.</td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">integralLimit_min</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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The integral minimum clamp value.</td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">integralLimit_max</code></td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
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The integral maximum clamp value.</td>
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<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">outLim_min</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
The output minimum clamp value.</td>
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<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">outLim_max</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
The output maximum clamp value.</td>
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<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">slewNeg</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
Negative slew value to dampen output.</td>
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<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">slewPos</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
<code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:13.6px;padding:0.2em 0.4em;margin:0px;background-color:rgba(27,31,35,0.05);border-radius:6px">double</code></td>
<td style="box-sizing:border-box;padding:6px 13px;border:1px solid rgb(223,226,229)">
Positive slew value to accelerate output.</td>
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</tbody>
</table>
<br></span></div></div></div></blockquote><div><a class="gmail_plusreply" id="gmail-plusReplyChip-0" href="mailto:krellan@google.com" tabindex="-1">+Josh Lehan</a> for input. </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><span style="font-family:Calibri,Arial,Helvetica,sans-serif;background-color:rgb(255,255,255);display:inline">
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<div id="gmail-m_-6430746694988440840divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>发件人:</b> 周 远清 <<a href="mailto:zhouyuanqing8@outlook.com" target="_blank">zhouyuanqing8@outlook.com</a>><br>
<b>发送时间:</b> 2020年9月27日 11:17<br>
<b>收件人:</b> openbmc <<a href="mailto:openbmc@lists.ozlabs.org" target="_blank">openbmc@lists.ozlabs.org</a>><br>
<b>抄送:</b> <a href="mailto:uperic@163.com" target="_blank">uperic@163.com</a> <<a href="mailto:uperic@163.com" target="_blank">uperic@163.com</a>><br>
<b>主题:</b> about pid speed control</font>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Hi everyone,</div>
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<br>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
I added the phophor-pid-control module to my project. After the PID module was started, the pwm value oscillated between 12 and 153. I deleted other configurations and only kept one fan and one temp. I have debugged various PID parameter values of fan,
and there is no obvious change in the phenomenon. Please take a look at it, thank you.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
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<span style="color:rgb(81,167,249)"> </span><span style="color:rgb(81,167,249)"> </span><span style="color:rgb(81,167,249)">The configuration is as follows</span><span style="color:rgb(81,167,249)">: </span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
4611 root 7616 S /usr/bin/swampd -t -l /tmp/<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
root@starlake-sn:~# cat /etc/thermal.d/setpoint</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
3000</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span style="color:rgb(81,167,249)"> </span><span style="color:rgb(81,167,249)"> config.json as follow:</span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
{
<div> "sensors" : [</div>
<div> {</div>
<div> "name": "Fan0_Speed",</div>
<div> "type": "fan",</div>
<div> "readPath": "/xyz/openbmc_project/sensors/fan_tach/Fan0_Speed",
</div>
<div> "writePath": "/xyz/openbmc_project/sensors/fan_tach/Fan0_Speed", </div>
<div> "min": 0,</div>
<div> "max": 255,</div>
<div> "timeout": 0</div>
<div> },</div>
<div> {</div>
<div> "name": "inlet_Temp",</div>
<div> "type": "temp",</div>
<div> "readPath": "/xyz/openbmc_project/sensors/temperature/inlet_Temp",</div>
<div> "writePath": "",</div>
<div> "min": 0,</div>
<div> "max": 0,</div>
<div> "ignoreDbusMinMax": true,</div>
<div> "timeout": 0</div>
<div> }</div>
],</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
"zones" : [
<div> {</div>
<div> "id": 1,</div>
<div> "minThermalOutput": 3000.0,</div>
<div> "failsafePercent": 75.0,</div>
<div> "pids": [</div>
<div> {</div>
<div> "name": "Fan0_Speed",</div>
<div> "type": "fan",</div>
<div> "inputs": ["Fan0_Speed"],</div>
<div> "setpoint": 50.0,</div>
<div> "pid": {</div>
<div> "samplePeriod": 0.1,</div>
<div> "proportionalCoeff": 20.0,</div>
<div> "integralCoeff": 0.1, </div>
<div> "feedFwdOffsetCoeff": 0.0,</div>
<div> "feedFwdGainCoeff": 1.0, </div>
<div> "integralLimit_min": 0.0, </div>
<div> "integralLimit_max": 5.0, </div>
<div> "outLim_min": 5.0, </div>
<div> "outLim_max": 60.0, </div>
<div> "slewNeg": 0.0,</div>
<div> "slewPos": 0.0</div>
<div> }</div>
<div> },</div>
<div> {</div>
<div> "name": "inlet_Temp",</div>
<div> "type": "temp",</div>
<div> "inputs": ["inlet_Temp"], </div>
<div> "setpoint": 50.0,</div>
<div> "pid": { amplePeriod": 0.1, </div>
<div> "samplePeriod": 1.0, </div>
<div> "proportionalCoeff": -0.1,</div>
<div> "integralCoeff": 1.0, 36;34Hin": 5.0,</div>
<div> "feedFwdOffsetCoeff": 0.0,</div>
<div> "feedFwdGainCoeff": 0.0, </div>
<div> "integralLimit_min": 0.0, </div>
<div> "integralLimit_max": 0.0, </div>
<div> "outLim_min": 3000.0, </div>
<div> "outLim_max": 16000.0, </div>
<div> "slewNeg": 0.0,</div>
<div> "slewPos": 0.0,</div>
<div> "positiveHysteresis": 1.0,</div>
<div> "negativeHysteresis": 1.0 </div>
}<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
}
<div> ]</div>
<div> }</div>
<div> ]</div>
}<br>
</div>
</div>
</div>
</div>
</blockquote></div></div>