This paper is focused on how to establish mathematical model of vectoring nozzle on the basis of flow field calculation 本文的研究就是针对矢量喷管数学模型的建立开展的。
The thrust-vectoring nozzle control and integrated control of the engine and thrust-vectoring nozzle are researched in this paper 这样,不仅使模型完全达到实时性要求,而且使得计算过程思路更加清晰,易于理解。
The thrust-vectoring nozzle control and integrated control of the engine and thrust-vectoring nozzle are researched in this paper 这样,不仅使模型完全达到实时性要求,而且使得计算过程思路更加清晰,易于理解。
The unsteady flow as thrust vectoring nozzle deflecting dynamically is investigated . the method of calculating the unsteady flow in the nozzle is given and the flow of the nozzle in the maximum power setting and maximum a / b power setting of the engine is calculated 研究了矢量喷管动态偏转过程中气流的非定常流动和矢量喷管非定常流动计算方法,计算了矢量喷管在发动机某中间状态和加力状态下的非定常流场。
More than 200 different condition 3d viscosity steady flow fields in the thrust vectoring nozzle at different nozzle pressure ratio and different nozzle area ratio and different geometric defected angle is calculated by the program developed . and the related performance parameters are acquired by numerical simulation 利用该程序计算了某矢量喷管在不同的压比、面积比和几何偏转角下的200多种三维有粘流场,获得了矢量喷管的性能数据。
And establishing the model of the thrust vectoring nozzle is the base for researching thrust vectoring technique and engine performance with vectoring nozzle, especially the integration of flight and propulsion system control ( ifpsc ) . so thrust vector modeling is very important and meaningful 矢量喷管是实现推力矢量的关键部件,建立其数学模型是推力矢量技术尤其是开展带矢量喷管的发动机研究以及飞推一体化综合控制研究的基础,具有十分重要的意义。
And establishing the model of the thrust vectoring nozzle is the base for researching thrust vectoring technique and engine performance with vectoring nozzle, especially the integration of flight and propulsion system control ( ifpsc ) . so thrust vector modeling is very important and meaningful 矢量喷管是实现推力矢量的关键部件,建立其数学模型是推力矢量技术尤其是开展带矢量喷管的发动机研究以及飞推一体化综合控制研究的基础,具有十分重要的意义。
The calculating results of steady flow and unsteady flow in the nozzle are compared . and it proves that both the results of the steady flow and the results of the unsteady . flow are uniform basically . this is very valuable because it is convenient to study the flow in the vectoring nozzle by steady hypothesis or steady test 分析比较了定常流动计算结果和非定常流动计算结果,得出了定常流动计算结果和非定常计算结果的基本一致性,从而为工程通过定常计算或试验来研究矢量喷管以及建立其数学模型提供了依据。
The application background of thrust vectoring technology on aircraft and its advantages are analyzed . the main characteristics of some type of vectoring nozzles are discussed, the expression of thrust vectoring force and moment are set up . then, the nonlinear motion equations of aircraft with three axes of thrust vectoring are deduced 本文主要针对推力矢量飞机非线性飞行控制的理论和应用问题进行了一定的探索和研究,进行的主要工作有:1、研究了推力矢量在飞机上的应用背景和收益,分析了现有推力矢量喷管的主要形式和特点,给出了推力矢量力、力矩的数学模型,并在此基础上推导了带三轴推力矢量飞机的非线性运动方程,为控制律的设计奠定基础。
This article researches on mathematical model of the control mechanism of the thrust-vectoring nozzle . some reasonable simplification methods are used to build this model because the control mechanism is very complication . this model satisfies the real-time and precision requests of the control system 本文通过对矢量喷管控制机构运动规律的深入分析,采用合理的简化方法,对一些隐函数关系进行了显示化处理,建立了矢量喷管控制机构的运动学数学模型,该模型在计算精度和实时性上满足了控制要求。