首页> 外文会议>ASME turbo expo >MODELING OF ATMOSPHERIC TURBULENCE AS DISTURBANCES FOR CONTROL DESIGN AND EVALUATION OF HIGH SPEED PROPULSION SYSTEMS
【24h】

MODELING OF ATMOSPHERIC TURBULENCE AS DISTURBANCES FOR CONTROL DESIGN AND EVALUATION OF HIGH SPEED PROPULSION SYSTEMS

机译:湍流建模作为高速推进系统控制设计与评估的扰动

获取原文

摘要

Atmospheric turbulence models are necessary for the design of both inlet/engine and flight controls, as well as for studying integrated couplings between the propulsion and the vehicle structural dynamics for supersonic vehicles. Models based on the Kolmogorov spectrum have been previously utilized to model atmospheric turbulence. In this paper, a more accurate model is developed in its representative fractional order form, typical of atmospheric disturbances. This is accomplished by first scaling the Kolmogorov spectral to convert them into finite energy von Karman forms. Then a generalized formulation is developed in frequency domain for these scale models that approximates the fractional order with the products of first order transfer functions. Given the parameters describing the conditions of atmospheric disturbances and utilizing the derived formulations, the objective is to directly compute the transfer functions that describe these disturbances for acoustic velocity, temperature, pressure and density. Utilizing these computed transfer functions and choosing the disturbance frequencies of interest, time domain simulations of these representative atmospheric turbulences can be developed. These disturbance representations are then used to first develop considerations for disturbance rejection specifications for the design of the propulsion control system, and then to evaluate the closed-loop performance.
机译:大气湍流模型对于进气/发动机和飞行控制的设计以及研究超音速飞行器的推进力与飞行器结构动力学之间的综合耦合都是必需的。先前已使用基于Kolmogorov光谱的模型来模拟大气湍流。在本文中,以典型的大气干扰分数阶数形式开发了更精确的模型。这是通过首先缩放Kolmogorov光谱以将其转换为有限能量的von Karman形式来实现的。然后,在频域中为这些比例模型开发一个通用的公式,该公式将分数阶与一阶传递函数的乘积近似。给定描述大气干扰条件的参数并利用导出的公式,目标是直接计算描述这些干扰的传递函数,以描述声速,温度,压力和密度。利用这些计算出的传递函数并选择感兴趣的扰动频率,可以开发这些代表性大气湍流的时域模拟。这些扰动表示然后被用于首先为推进控制系统的设计制定对扰动抑制规范的考虑,然后评估闭环性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号