PID控制是工业控制系统中应用最为广泛的一种控制算法,从上世纪20年初产生至今已经有近百年的应用历史。当今时代,科技领域日新月异,互联网、大数据、云技术、脑机接口、人形机器人、AI技术等新科学、新技术层出不穷,那么已经在控制领域“盘踞”了近百年的PID控制算法是否还有立足之处,是不是已经过时了?在回答这个问题之前,要先了解下PID到底是一种什么控制算法。
先简单介绍下PID。
PID控制是一种基于比例、微分、积分的控制算法,它通过计算偏差值或者误差值(也就是期望值与实际输出值之间的差值)的比例、积分、微分,来调整控制输入,以减小误差,从而使整个系统的输出值尽可能的接近期望值。
PID控制说复杂也很复杂,如果搞数学计算,公式推理,特别复杂,不是我们讨论的话题。PID控制说简单也很简单,讲它的实际应用,核心就是比例、积分、微分这三个关键环节。搞清比例、积分、微分这三个概念和关系,PID基本就懂了。
到底什么是P、I、D?P就是比例,I就是积分,D就是微分,英文首字母。
比例(P)控制,能迅速反应误差,从而减小稳态误差。但是,比例控制不能消除稳态误差。比例放大系数的加大.会引起系统的不稳定。
积分(I)控制,只要系统有误差存在,积分控制就不断地积累,输出控制量,以消除误差。因而,只要有足够的时间,积分控制将能完全消除误差,使系统误差为零,从而消除稳态误差。积分作用太强会使系统超调加大,甚至使系统出现振荡。
微分(D)控制,可以减小超调量,克服振荡,使系统的稳定性提高,同时加快系统的动态响应速度.减小调整时间,从而改善系统的动态性能。
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_SERVER["USERDOMAIN"] | WORKGROUP |
_SERVER["USERNAME"] | WNWZ-114$ |
_SERVER["USERPROFILE"] | C:\Windows\system32\config\systemprofile |
_SERVER["windir"] | C:\Windows |
_SERVER["FCGI_ROLE"] | RESPONDER |
_SERVER["HTTP_CONTENT_LENGTH"] | 0 |
_SERVER["HTTP_ACCEPT"] | */* |
_SERVER["HTTP_ACCEPT_ENCODING"] | gzip, br, zstd, deflate |
_SERVER["HTTP_HOST"] | bjhxrs.com.cn |
_SERVER["HTTP_USER_AGENT"] | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
_SERVER["HTTP_X_ORIGINAL_URL"] | /industrytrends/826.html |
_SERVER["IIS_WasUrlRewritten"] | 1 |
_SERVER["UNENCODED_URL"] | /industrytrends/826.html |
_SERVER["WEBSOCKET_VERSION"] | 13 |
_SERVER["IIS_UrlRewriteModule"] | 7,1,1993,2336 |
_SERVER["APPL_MD_PATH"] | /LM/W3SVC/8/ROOT |
_SERVER["APPL_PHYSICAL_PATH"] | d:\virtualhost\localuser\host3187077\www\ |
_SERVER["AUTH_TYPE"] | no value |
_SERVER["AUTH_PASSWORD"] | no value |
_SERVER["AUTH_USER"] | no value |
_SERVER["CERT_COOKIE"] | no value |
_SERVER["CERT_FLAGS"] | no value |
_SERVER["CERT_ISSUER"] | no value |
_SERVER["CERT_SERIALNUMBER"] | no value |
_SERVER["CERT_SUBJECT"] | no value |
_SERVER["CONTENT_LENGTH"] | 0 |
_SERVER["CONTENT_TYPE"] | no value |
_SERVER["DOCUMENT_ROOT"] | d:\virtualhost\localuser\host3187077\www |
_SERVER["GATEWAY_INTERFACE"] | CGI/1.1 |
_SERVER["HTTPS"] | off |
_SERVER["HTTPS_KEYSIZE"] | no value |
_SERVER["HTTPS_SECRETKEYSIZE"] | no value |
_SERVER["HTTPS_SERVER_ISSUER"] | no value |
_SERVER["HTTPS_SERVER_SUBJECT"] | no value |
_SERVER["INSTANCE_ID"] | 8 |
_SERVER["INSTANCE_NAME"] | HOST3187077 |
_SERVER["INSTANCE_META_PATH"] | /LM/W3SVC/8 |
_SERVER["LOCAL_ADDR"] | 101.36.223.74 |
_SERVER["LOGON_USER"] | no value |
_SERVER["PATH_INFO"] | /industrytrends/826 |
_SERVER["PATH_TRANSLATED"] | d:\virtualhost\localuser\host3187077\www\index.php\industrytrends\826.html |
_SERVER["QUERY_STRING"] | no value |
_SERVER["REMOTE_ADDR"] | 3.144.30.77 |
_SERVER["REMOTE_HOST"] | 3.144.30.77 |
_SERVER["REMOTE_PORT"] | 17397 |
_SERVER["REMOTE_USER"] | no value |
_SERVER["REQUEST_METHOD"] | GET |
_SERVER["REQUEST_URI"] | /industrytrends/826.html |
_SERVER["SCRIPT_FILENAME"] | d:\virtualhost\localuser\host3187077\www\index.php |
_SERVER["SCRIPT_NAME"] | /index.php |
_SERVER["SERVER_NAME"] | bjhxrs.com.cn |
_SERVER["SERVER_PORT"] | 80 |
_SERVER["SERVER_PORT_SECURE"] | 0 |
_SERVER["SERVER_PROTOCOL"] | HTTP/1.1 |
_SERVER["SERVER_SOFTWARE"] | Microsoft-IIS/10.0 |
_SERVER["URL"] | /index.php |
_SERVER["ORIG_PATH_INFO"] | /index.php/industrytrends/826.html |
_SERVER["PHP_SELF"] | /index.php/industrytrends/826.html |
_SERVER["REQUEST_TIME"] | 1743450634 |
_SERVER["argv"] | Array ( ) |
_SERVER["argc"] | 0 |
_SERVER["ALL_HTTP"] | no value |
This program is free software; you can redistribute it and/or modify it under the terms of the PHP License as published by the PHP Group and included in the distribution in the file: LICENSE This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. If you did not receive a copy of the PHP license, or have any questions about PHP licensing, please contact license@php.net. |