摘要
目前常用的带式输送机节能控制方法是通过建立煤量与带速之间的匹配关系来控制运行速度以达到节能目的,但因其采用传感器测量实时煤量时,受到传感器安装位置及数据处理速度等因素的影响,导致检测信号与实时煤量信息不同步而引起滞后现象。当煤量突然增加时,易造成带式输送机无法及时提速引发堆煤或溢煤等故障。为解决上述问题,提出了一种新的节能控制方法:通过采用状态重构的方法建立带式输送机系统状态观测器估计输送带上各段张力值,并以机头传动滚筒处输送带张力值的变化率结合电子输送带秤检测的实时煤量信息,应用模糊推理与决策建立了节能控制系统,控制带式输送机在煤量增加时及时提速。基于此,以带式输送机启动过程线性定常系统模型为依托,建立了基于载荷变化的带式输送机时变系统动力学模型,并利用Simulink与LabVIEW软件结合NI CompactRIO-9038实时控制器做硬件在环实验验证,结果表明:在煤量无较大波动时,输送机仍保持恒定速度,说明系统抗干扰能力强;在煤量突变情况下,张力变化率辅助提速效果明显,解决了堆煤及溢煤故障。
It is the current general energy-saving control method that a matching relationship between coal volume and belt speed is used to control the belt speed.However,the influences of the sensor installation position and data processing speed will cause the detection sig⁃nal to lag behind the real-time coal information.When the coal volume suddenly increases,the belt conveyor cannot accelerate in time to cause the occurrence of coal accumulation and overflow.In order to solve the above problems,a new energy-saving control method is pro⁃posed in this paper.The state observer of the belt conveyor system is established to estimate the tension value of each section on the con⁃veyor belt.And then,combining the change rate of the belt tension value at the head drive roller with the coal volume information tested by the electronic belt scale in real time,an new energy-saving system is established by applying fuzzy reasoning and decision-making to con⁃trol the belt conveyor accelerate when the coal volume increase.Based on this,basing on the linear steady-state system model of belt con⁃veyor start-up process,a time-varying system dynamics model of belt conveyor based on load change is established,and the hardware in loop test is performed by using NI CompactRIO-9038 real-time controller,Simulink and LabVIEW software.The verification results show that:when the coal volume does not fluctuate greatly,the conveyor maintains a constant speed,indicating that the system has strong antiinterference ability;in the case of sudden change of coal volume,the speed-up effect is obvious with the auxiliary help of the tension change rate,and these issues of the coal accumulation and overflow can be solved.
作者
郝洪涛
杨庭杰
张超
HAO Hongtao;YANG Tingjie;ZHANG Chao(School of Mechanical Engineering,Yinchuan 750021,China;Ningxia Key Laboratory of CAE on Intelligent Equipment,Yinchuan 750021,China)
出处
《煤炭科学技术》
CAS
CSCD
北大核心
2021年第7期139-146,共8页
Coal Science and Technology
基金
宁夏回族自治区重点研发资助项目(2019BDE03001)。
关键词
带式输送机
动力学模型
负载估计
节能控制
煤量识别
belt conveyor
dynamics model
load estimation
energy-saving control
coal flow identification
作者简介
郝洪涛(1976-),男,宁夏中宁人,副教授,博士。Email:haoht_03@126.com。
