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Title:
METHOD FOR DIRECTLY PLANNING REENTRY TRAJECTORY IN ALTITUDE-VELOCITY PROFILE
Document Type and Number:
WIPO Patent Application WO/2021/036778
Kind Code:
A1
Abstract:
A method for directly planning a reentry trajectory in an altitude-velocity profile comprises the following steps: S1, extracting actual operation parameters of an aircraft, configuring, according to a task requirement, a stagnation point heat flux maximum (I), a dynamic pressure maximum qmax, and an overload maximum nmax, and solving for an altitude-velocity boundary of a reentry trajectory, that is, a lower boundary of the reentry trajectory in an altitude-velocity profile; S2, finding, according to a reentry motion differential equation, the reentry trajectory in an initial descent phase, and determining a start point of a glide phase according to the trajectory in the initial descent phase; and S3, planning, on the basis of the lower boundary of the altitude-velocity profile, a trajectory in the altitude-velocity profile that meets a constraint of a terminal, calculating a corresponding angle of inclination, and obtaining the reentry trajectory. The present method enables accurate planning of a reentry trajectory, and eliminates risks of generating a reentry trajectory that does not meet a process constraint due to lack of consideration of a flight path angle and a change rate thereof, thereby improving reliability of reentry trajectories, achieving fast computation, and providing high solution accuracy.

Inventors:
ZHOU WENYA (CN)
NIE ZHENTAO (CN)
YANG FENG (CN)
LIU KAI (CN)
WANG GUANJUN (CN)
LI ZHE (CN)
XU HONGGANG (CN)
GAO FEIXIONG (CN)
Application Number:
PCT/CN2020/108383
Publication Date:
March 04, 2021
Filing Date:
August 11, 2020
Export Citation:
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Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G05D1/10
Foreign References:
CN110471450A2019-11-19
CN107992074A2018-05-04
CN105205281A2015-12-30
CN106354152A2017-01-25
CN104732106A2015-06-24
CN107941087A2018-04-20
RU2011135313A2013-03-10
Attorney, Agent or Firm:
BEIJING HUIYINGJIECHUANG INTELLECTUAL PROPERTY AGENCY (CN)
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