【作者】 王乐；

【导师】 曾庆双；

【作者基本信息】 哈尔滨工业大学 ， 控制理论与控制工程， 2009， 硕士

【摘要】 飞机线性化模型在一定的状态范围内是分段有效的,当飞机工作在非线性范围内时,例如大攻角、快机动时,线性化模型就不再适用,需要利用非线性动态逆来处理模型。本文涉及的飞行实时仿真系统是一种半实物仿真系统,该系统主要基于MATLAB和LABVIEW平台构建,利用实时网络通信,将舵机、姿态角、发动机、大气压等难以建立精确数学模型的系统以实物方式加入飞行控制仿真回路中,以更精确地测试飞控系统的性能。本文主要结构如下:首先创建了飞机的非线性模型,并对它进行了小扰动线性化,将其解耦为横向和纵向两组线性方程,在每组方程中根据飞行状态划分进一步简化,使之成为单输入单输出系统(SISO),以方便控制器的设计。其次,针对某型战斗机线性化模型设计了常规PID控制器,并在此基础上设计了智能PID控制器,并分别应用于该型飞机的非线性模型进行测试,比较了两种PID控制方法的品质和鲁棒性。再次,针对飞机大迎角快机动时线性化模型已经不再适用的情况,利用非线性动态逆对非线性模型进行了全局线性化,在此基础上设计了线性控制器。最后,介绍了实时飞行仿真系统的基本构成以及工作原理。并设计了飞控系统的半实物仿真实验方案。更多还原

【Abstract】 The linear model of aircraft is sub-effective. When the aircraft fly at a high attack angle, it is failure. So we should introduce a new theory to handle the non-linear model. The theory is non-linear dynamic inverse.Real-time flight simulation system is a hard-in-loop simulation system. It based on MATLAB and LABVIEW, and utilized real-time network to communicate. It add some systems that it is hard to get their precise math model in real things into the loop of flight control simulation. It can make the test of the flight control system more precise. On the other hand, it is easier to test with the system. And in the system, there is a visual system and curse computer,. This show the data more clear, and made the design and assessment of the system more easier.In the paper, first of all, the non-linear aircraft model is introduced, and had a small signal linearization. Then it is decoupling for two sets: one is horizontal linear equations, the other is vertical linear equations. This two sets is made to single-in-single-out system (SISO) to facilitate the controller design. Secondly, we designed the conventional PID controller of the fighter jets’linear model. On this basis we designed the expert PID controller, and tested them on the mom-linear model.Thirdly, when aircraft fly at a big attack angle, the linear model of aircraft has being failure. Then we utilize the non-linear dynamic inverse to linearize the non-linear model in global scope. And design a linear controller.Finally, we introduce the component and the working principle of the real-time flight simulation system. And the experiment of the flight control system is designed based on the real-time flight simulation system.更多还原