放宽静稳定度飞机时间延迟稳定边界

doi:10.7527/S1000-6893.2019.23487

流体力学与飞行力学

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放宽静稳定度飞机时间延迟稳定边界

陈晓明¹, 孙绍山², 陶呈纲², 唐勇²

1. 北京航空航天大学航空科学与工程学院, 北京 100083;
2. 中国航空工业成都飞机设计研究所歼击机综合仿真航空科技重点实验室, 成都 610091

收稿日期:2019-09-11 修回日期:2019-11-01 出版日期:2020-06-15 发布日期:2019-12-12
通讯作者: 陈晓明 E-mail:cxmbuaa@163.com

Time delay stability boundary on relaxed static stability aircraft

CHEN Xiaoming¹, SUN Shaoshan², TAO Chenggang², TANG Yong²

1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China;
2. The Aviation Key Laboratory of Fighter Integrated Simulation, AVIC Chengdu Aircraft Design and Research Institute, Chengdu 610091, China

Received:2019-09-11 Revised:2019-11-01 Online:2020-06-15 Published:2019-12-12

摘要/Abstract

摘要： 针对飞机初步设计阶段其放宽静稳定度（RSS）与电传飞控系统时间延迟边界之间的定量关系求解问题，以战斗机纵向短周期方程为基础，分析了飞控系统中的时间延迟因素，描述了放宽静稳定度与方程参数间的关系。并以等效输入延迟的形式构建了含飞控系统时间延迟的闭环系统特征方程，通过根轨迹趋势理论和数值计算方法确定了放宽静稳定度与飞控系统时间延迟边界的定量数值关系，同时探讨了舵效与动导的参数不确定性对所求时间延迟边界的影响。本文方法对飞机初步设计阶段飞控系统时间延迟指标和可放宽静稳定度边界的确定具有一定的工程实践意义。

关键词: 时间延迟稳定性, 短周期模态, 放宽静稳定度, 可控性评估, 初步设计

Abstract: The problem of quantitative determination between Relaxed Static Stability (RSS) and time delay boundary of the fly-by-wire control system during the preliminary design stage of aircraft is studied. Based on the longitudinal short-period equation of the combat aircraft, the time delay factor in the flight control system and the relationship between parameters in short period equation and RSS is analyzed. A characteristic equation of closed-loop system with time delay of flight control system is constructed in the form of equivalent input delay. The quantitative numerical relationship between the RSS and the time delay boundary of the flight control system is determined by the root tendency theory and the numerical calculation method. Moreover, the influence of the parameter uncertainty of control surface efficiency and dynamic derivative on the time delay boundary is also discussed. The method of this paper has certain engineering practical significance for determining the time delay boundary of the flight control system and the RSS of the aircraft in the preliminary stage of aircraft design.

Key words: time delay stability, short period mode, relaxed static stability, controllability evaluation, preliminary design

中图分类号:

V212.1

陈晓明, 孙绍山, 陶呈纲, 唐勇. 放宽静稳定度飞机时间延迟稳定边界[J]. 航空学报, 2020, 41(6): 523487-523487.

CHEN Xiaoming, SUN Shaoshan, TAO Chenggang, TANG Yong. Time delay stability boundary on relaxed static stability aircraft[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(6): 523487-523487.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

放宽静稳定度飞机时间延迟稳定边界

Time delay stability boundary on relaxed static stability aircraft

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