Origin: Reference news
The reporter learns from national spaceflight bureau, on August 2 7 when 0 minutes, our country first day of Martian exploration task asks engine of 3000N of a detector the job 20 seconds, finish midway of first time orbit smoothly to amend, continue to fly to spark.
▲ ” the day asks ” blast off enter the space spot Xinhua News Agency is sent
Before be being amended up to first time orbit, the day asks a detector to already restricted 230 hours in the flight in aerospace, distance earth makes an appointment with 3 million kilometer, each system position is good.
How does the day ask to arrive at spark from the earth? Animation demonstrates flight whole process
3000N engine light a fire, finishing orbit amendatory at the same time, test and verify engine is in the real property of course. Follow-up, the day asks a detector still will experience deep space motor-driven and several midway to amend, flight going straight towards fire arrives at spark after 6 many months around, be captured to enter annulus fire path by Martian gravitation through apply the brake, begin land to prepare and be explored scientificly of spark wait for the job.
▲ on July 27, 2020, the day asks a detector is flying to arrange place of 1.2 million kilometer from the earth, benefit consumed learns navigation sensitive implement filmed black and white month group photo.
Why should undertake midway is amended?
According to expert introduction, a lot of cars have driveway to maintain a function now, if car deviate oneself driveway, meet self-correcting direction, let a car return originally driveway comes up. The orbit of Martian detector is amended be like with and so on, but different is Martian detector wanting an amendatory is flight direction not just, still have the many variable such as flight speed. And in vast outer space, detector also serves as without road graticule consult content, difficulty is very accordingly great.
In process of flight of orbit of move of fire is in the ground, detector can get the element such as course deviation, control precision deviation is affected. Because detector is in for long,fly without motivation, small positional speed error can be accumulated gradually and magnify, if do not undertake correction, will make detector misses spark, bring about ” poor an iota, erroneous with a thousand li ” serious consequence. When executing flight mission accordingly, need makes ground fire transfer orbit midway to revise control strategy, include every time amendatory opportunity, amend rate increment size and speed increment way every time. In real task, the detector attitude that the researcher needs to amend the politic correspondence that finish according to midway and orbit are controlled, ensure detector flies to go up in booked orbit from beginning to end.
As we have learned, this subaltern before this asked for essence of 5 carrier rocket to send Martian detector definitely book orbit, make this orbit pilot main the target is to enter course precision to amend no longer, the first time that should finish orbit to control 3000N sustainer however works and be in course demarcate, after this still will fly actually according to detector condition, the thrust that uses midway to amend pair of engine and direction continuously demarcate, iteration optimizes midway to revise strategy, make sure detector can enter spark well and truly to capture finally corridor.