摘要
在水工物理模型试验中,为了克服水工物理模型自控系统存在硬件集成度较低、兼容性与可拓展性不足的缺点,通过对自动控制系统流量、水位控制需求的分析,提出对流量、水位控制子系统进行模块化设计的思路。在"当前"水位与"目标"水位之间设置中间值,优化了水位控制原理,模拟了水位的缓变过程,优化了对尾门的控制。基于USB总线技术,利用Labview软件开发了硬件集成度高、灵活性强、兼容性好的可视化虚拟自动控制系统。系统已成功应用于多个非恒定流模型中,可使模型的水位、流量控制精度达到98%,超调量不超过5%。系统可在水工、河工模型的非恒定流试验中推广使用。
Currently,automatic control systems of hydraulic physical models have shortcomings of low hardware integration,compatibility and expandability.Based on the analysis on requirements of discharge and water level control,we put forward the concept that the flow,water level control subsystem should be designed modularly.By setting several intermediate values between current water level and target level,the water level control principle is optimized,therefore,the process of gradual change of water level is simulated and the control of tail gate is optimized as well.We have developed the virtual control system with high hardware integration,compatibility and expandability by using Labview software and USB bus technology.The system has been successfully applied to various model tests of non-consistent flow,the control accuracy of flow and water level were both higher than 98%,and the over-adjusting value was lower than 5%.
出处
《人民长江》
北大核心
2011年第7期67-69,共3页
Yangtze River
基金
重庆交通大学校内科学基金资助项目(XN(2009)10)
关键词
USB总线
流量
水位
虚拟控制系统
USB bus
discharge
water level
virtual control system
