【作者】 高育帼；

【导师】 高宏力；

【作者基本信息】 西南交通大学 ， 测试计量技术及仪器， 2013， 硕士

【摘要】 环境试验在航空及航天工程领域具有非常重要的地位,同时随着工业空气动力学的发展,其应用领域已延伸到了交通运输、房屋建筑、风能利用等行业。然而作为环境试验重要组成部分的攻角机构,即环境中模型姿态调整平台,其控制系统性能在很大程度上决定了整个平台运行稳定性、带负载能力及模型运动精度等性能指标。本课题来源于某环境改造项目,首先,针对模型姿态调整平台电液伺服阀控制液压马达系统的相关技术展开研究。在详细分析了平台机械和液压系统原理后,充分考虑影响系统控制精度的各个因素,建立系统各环节传递函数,并结合系统实际参数值确定系统整体数学模型,进行基本的稳定性和系统响应分析。由于电液伺服系统是典型的未知不确定非线性系统[16],因此为加快系统响应速度,提高控制精度,在多种控制算法中考虑到算法可行性与适应性,提出经典PID控制和模糊PID控制两种控制算法,并进行控制器设计与Matlab仿真分析。在进行了系统建模和PID及模糊PID两种智能控制算法仿真分析后,结合模型姿态调整平台的功能需求,分析并对比当下可行的控制方法,确定合适的控制方案,并从硬件设计、软件编程、人机界面等方面进行介绍。最后通过整机性能试验,证明控制算法能够满足平台控制需求,同时验证了控制方案和控制方法的可行性与可操作性。实现了模型在环境中预期的姿态调整目标。试验表明,该姿态调整平台已经实现了环境中模型的多种姿态调整,动作运行稳定、控制效果良好,为该环境的完善和模型环境实验提供了很好的硬件平台。更多还原

【Abstract】 Wind tunnel test has a very important role in the aviation field and aerospace engineering. With the development of industry aerodynamic, the application field of wind tunnel has extended to industry like Transportation Building construction、 Wind energy utilization, etc. As the important part of wind tunnel, Control performance of attack angle mechanism also know as attitude adjustment platform, determines operation stability、loading capacity and motion precision.This topic is based on a wind tunnel reformation project, related researches are carried out on the technology of electro-hydraulic servo valve controlled motor system of the model attitude adjusting platform. Based on detailed analysis of the principle of platform of mechanical and hydraulic system, via fully consideration of the various factors affecting the control system precision, the transfer function of each component of the system are set up. Combined with the actual parameter values to determine the overall system mathematical model, the basic stability and system response analysis is carried out.For the electro-hydraulic servo system is a typical unknown uncertain nonlinear systems, To accelerate the speed of response and improve the control precision, classical PID control and fuzzy PID control intelligent algorithms are used, also controller design and Matlab simulation analysis are developed.After system modeling and simulation analysis of the PID and fuzzy PID intelligent control algorithms, Combined with the model attitude adjustment platform functional requirements, by analysis of the current feasible control method, the appropriate control scheme is determined, and give a brief description of hardware design, interface, software program, etc. Via overall performance test, the system control scheme is put forward to meet the needs of the platform control, the control scheme and control methods feasibility and operability is verified. The expected attitude adjustment target is implemented.Currently, the attitude adjustment platform has realized many kinds of model attitude adjustment action in wind tunnel, and is working in a good condition, also has a good control effect, provides a good hardware platform for improvement of wind tunnel and wind tunnel experiments.更多还原