基于iHawk平台的飞机刹车半实物仿真系统设计

【作者】 姜东红；

【导师】 谢利理；

【作者基本信息】 西北工业大学 ， 电力电子与电力传动， 2006， 硕士

【摘要】 飞机刹车系统对飞机的整体性能和安全起着至关重要的作用,它结构复杂,设计难度大,资金投入多,因此在设计与实验过程中,系统仿真作为重要技术得到了广泛的应用。半实物仿真比实物仿真投资少、效率高,比数字仿真更接近实际,是较理想的研究手段,可以作为验证飞机刹车系统控制算法、评估实际控制效果和整体性能的有效试验平台。 本文在全面分析飞机刹车系统工作原理的基础上,确定了飞机刹车系统的仿真要求,设计了基于iHawk实时仿真器和RT-LAB开发平台的半实物仿真系统,并对系统总体结构、实时仿真计算机选型、与实物系统的接口以及仿真软件的实现等问题作了论述。 飞机刹车半实物仿真系统主要由模型系统(SM_Subsystem)和实物系统(SS_Subsystem)组成,其中模型系统包括飞机动力学模型、起落架模型、机轮模型、轮胎/跑道特性模型、刹车装置模型等,实物系统包括刹车控制单元和液压伺服系统等。针对飞机刹车系统各组成部分的动态特性,文中详细论述了各模型的构建,并通过飞机刹车系统的全数字仿真对系统模型的有效性进行了验证。 在MATLAB/Simulink环境下,使用RT-LAB等开发工具,进行了半实物仿真系统软件设计,解决了模型拆分、并行处理优化、子系统通讯、人机交互等关键问题。文中还利用S函数开发了RS485串口通讯模块,解决了半实物仿真系统与视景系统的接口与实时通讯问题。 文中以某型飞机为例,对其刹车系统进行了半实物仿真试验,试验结果分析表明:本文所建立的飞机刹车系统半实物仿真试验平台真实可行,基本能反映飞机刹车系统实际试验情况,可以有效地验证某型飞机刹车系统的性能,有一定的实际工程意义。更多还原

【Abstract】 Aircraft braking system is very important for the safety and the general character of the airplane. It is hard and costly in designing the complicated structure. So the simulation technology has been applied widely in design and experiment of aircraft braking system. The hardware-in-the-loop (HIL) simulation is an ideal research means because it is cheaper and more efficient than the physics simulation and more authentic than mathematics simulation, so it can be an effective experiment platform to test the control arithmetic of the airplane braking system and evaluate the actual control-effect and general performance.The demands of the simulation system are confirmed and the HIL simulation system based on iHawk real-time simulation computer and RT-LAB platform has been designed with the multianalysis of the operation theory of anti-skid braking system. The general structure of the HIL simulation system, the selecting of real-time simulation computer, the interface of model system between real object, the realization of the simulation software of the system has also been discussed in the paper.The HIL simulation system of aircraft brake mainly consists of SMSubsystem and SSSubsystem. The SMSubsystem includes the model of the airplane dynamics model, the landing gears model, the tire model, the runway model, the brake equipment model etc, and the SSSubsystem is made up of the controller of braking and hydraulic implement machine etc. Aim at the dynamic characteristic of the airplane braking system, the construction of the models is discussesed in detail and the efficiency of the braking system model is tested through the mathematics simulation.The design of the software of the HIL simulation system with RT-LAB in the environment of the MATLAB/SIMULINK is discussed in the paper, and the solve ways of some key- questions in model-split, optimization of concurrent processing, communication of the subsystem, human-computer interaction and so on are all mentioned too. And the real-time connection and communication between the view system and the HIL simulation system has also been realized with RS-485 bus.A HIL test has carried out aim at a kind of airplane braking system, and the test-result indicate that the test-platform of the HIL simulation system of the aircraftbrake is feasible, and the real test condition of aircraft braking system can be reflect, the whole performance of the anti-skid braking system can also be tested by the platform.更多还原