非保形平流层飞艇升空过程热力耦合建模与压差控制分析  

Thermodynamic Dynamic Coupling Modeling and Differential Pressure Control Analysis of Non-conformal Stratospheric Airship Liftoff Process

作　　者：侯凯振 杨朝旭 荣海军[1,2,3] 靳鹏飞 Hou Kaizhen;Yang Zhaoxu;Rong Haijun;Jin Pengfei(State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,China;Shanxi Key Laboratory of Environment and Control for Flight Vehicle,Xi’an Jiaotong University,Xi’an 710049,China;School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学机械结构强度与振动国家重点实验室,西安710049 [2]西安交通大学陕西省先进飞行器服役环境与控制重点实验室,西安710049 [3]西安交通大学航天航空学院,西安710049

出　　处：《航天控制》2023年第3期33-42,共10页Aerospace Control

基　　金：国家自然科学基金(61976172,12002254);陕西省重点研发计划(2023-YBGY-235)。

摘　　要：针对非保形平流层飞艇升空过程中气囊膨胀导致压强变化的问题,将飞艇升空阶段分为自由膨胀上升阶段和成形上升阶段,建立非保形平流层飞艇升空热力耦合模型,该模型很好地反映了飞艇内部的气体体积变化和压强变化,为研究平流层飞艇压差控制提供模型基础;考虑飞艇内部状态不能实时获取,提出基于模糊观测器的平流层飞艇压差控制方法,为保证在线学习能力,采用在线顺序模糊极限学习机(OS-Fuzzy-ELM)去训练模糊系统参数。对非保形平流层飞艇升空过程进行运动仿真分析,阐述了控制飞艇压差的必要性;对不同目标压强差下的压差控制进行仿真分析。结果表明,所设计的压差控制器具有良好的输入跟踪能力,对飞艇压差控制器的设计具有重要参考价值。In view of pressure change caused by air bag expansion during liftoff of non-conformal stratospheric airship,the launching phase of the airship is divided into free expansion rising phase and shaping rising phase.On the basis of this,the thermodynamic coupling model is established during the airship liftoff.The model can clearly be used to reflect the gas volume change and pressure change in the airship,which provides a model basis for studying the pressure difference control of the stratospheric airship.By considering that the internal states of airship can not be acquired in real time,a pressure difference control method based on fuzzy observer is proposed.In order to ensure the real-time learning ability,online sequential fuzzy extreme learning machine is used to train the fuzzy system parameters.The motion simulation of non-conformal stratospheric airship during its liftoff is firstly analyzed,and the necessity of differential pressure control for airship is expounded.The simulation results from different differential pressure targets show that the proposed differential pressure controller has good tracking ability.This achievement represents that it can serve as the important reference value for the design of airship differential pressure control.

关 键 词：平流层飞艇 热力耦合建模 压差控制 模糊观测器 

分 类 号：V274[航空宇航科学与技术—飞行器设计]