基于现场总线和实时网络的某射流风洞安全连锁与状态监控系统研制及应用

Development and application of a safety interlock and status monitoring system for a jet wind tunnel based on fieldbus and real-time network

摘要:

针对某射流风洞系统架构复杂、控制对象及液压机构多、模型支撑机构调节灵活、马赫数连续变化可调的特点，研制了一套专用的安全连锁与状态监控系统。该系统充分利用Profinet等先进现场总线和实时网络技术，搭建了基于西门子S7-1500系列PLC为核心控制器的硬件平台，并自主研发了实时监控软件系统，解决了多层/多源控制子系统之间的快速数据交换、试验前仿真运行模拟策略等技术问题，建立了可靠的安全联锁逻辑与三级关车机制。系统静动态测试表明，该系统适用马赫数0.3~3.5区间内的风洞试验，快速阀开闭时间优于10s，调压阀开闭时间优于2s，压力监测精准度优于0.1%，阀门开度监测精准度优于0.1mm，监测与控制调节周期优于100ms，系统运行稳定流畅，数据实时准确，为风洞人员及设备安全提供了必要的软硬件保障。

Abstract:

A dedicated safety interlock and status monitoring system has been developed for a jet wind tunnel system with complex architecture, multiple control objects and hydraulic mechanisms, flexible adjustment of model support mechanisms, and continuous adjustable Mach numbers. The system fully utilizes advanced fieldbus and real-time network technologies such as Profinet, builds a hardware platform based on Siemens S7-1500 series PLC as the core controller, and independently develops a real-time monitoring software system. It solves technical problems such as fast data exchange between multi-layer/multi-source control subsystems, simulation operation strategy before testing, and establishes reliable safety interlocking logic and three-level shutdown mechanism. The static and dynamic testing of the system shows that it is suitable for wind tunnel tests within the Mach number range of 0.3~3.5. The fast valve opening and closing time is better than 10 seconds, the pressure regulating valve opening and closing time is better than 2 seconds, the pressure monitoring accuracy is better than 0.1%, the valve opening monitoring accuracy is better than 0.1mm, the monitoring and control adjustment cycle is better than 100ms, the system operates stably and smoothly, and the data is real-time and accurate, providing necessary software and hardware guarantees for the safety of wind tunnel personnel and equipment.