Jump to content

Chinese Space Program (CNSA) & Ch. commercial launch and discussion


tater

Recommended Posts

  • 2 weeks later...

Details of 2020 China Mars Mission

Summary of member of Chinese Science Academy,Ye Peijian's Speech

Mission Briefing - Probe 
Probe: Oribitor + Lander (Entry Stage+Mars Rover)

pcFwWmc.png

Mission Briefing - Flights
Z8O9eYK.png

Launch by LM-5 in July/Aug, 2020, expected 7/23/2020
7 months transfer

deepspace maneuver on 10/5/2020

Mars intercept on 2/11/2021

 Orbiting Exploration

  • Life: 1 Mars year (687 earth days)
  • Orbit: 265km × 11943km inc 86.9°
  • Payload: 7 exploration equipment 

Descending and Landing (EDL)

  • Entry Mass: ~1285kg, including Mars rover: 240 kg
  • Entry speed: ~4.8km/s
  • Landing Area: 5°N - 30°N

Rovering

  • Life: 90 sol
  • Payload: 6 Exploration Equipment
  • Moving: active suspension, wheeling
  • Communication: Inter-probe communication, earth communication

Mission Briefing - Key Timing & Flights Stages

TL;DR

Mission Briefing - Structure

VEdigJ1.png

Launch - Earth-Mars Transfer, Mars Orbiting - Decoupling - Landing stage - Parachute Opening - Damping structure extending after heat shield discarded - landed - mars rover deployed

P8UTpKP.png

Entry stage: Hemispheric cone heat shield + Hemispheric cone back shield  diameter 3400mm, height 2607mm

gKmjq5U.png

Mars rover: 2000mm × 1650mm × 800mm

Solar wings: "Butterfly" structure 

Mission Briefing - Capturing Process

TL;DR 

Mission Briefing - EDL Process

ZbdHINV.png

  1. Aerobraking 90.4% (of entry speed) 4.8km/s -> 460m/s, ~300s
  2. Parachute braking 7.6% 460m/s->95m/s, 90s
  3. Powered decent 1.9% 95m/s->3.6m/s, 90s
  4. Damping 0.075%, 100m hovering, damping structure 

Terminal speed: Vertical< 3.6m/s Horizontal < 0.9m/s

Mission Briefing - Communication & Comparison

TL;DR

 

Link to comment
Share on other sites

9 hours ago, Scotius said:

I'm not sure i like those articulated solar panels on the rover. Hinges, actuators, control circuits. A lot of points of failure, in rough terrain, far from home. It looks to me as risky move.

They can always rotate the whole rover to face the Sun with solar panels if they get stuck. Besides, it's probably a much simpler set of motors than what other rovers' robotic arms have.

They clearly learned from other missions like Spirit, where the team had to find a slope and angle the whole rover towards the Sun just so it could survive the Martian winter.

Edited by Wjolcz
Link to comment
Share on other sites

  • 3 weeks later...
  • 2 weeks later...
10 minutes ago, 050644zf said:

Hovering test of China First Mars Lander, planned to launch in 2020

The link doesn't go to a page about the hover test that I can tell. Also, the 2 images are not linked properly and don't show.

 

http://www.chinadaily.com.cn/a/201911/14/WS5dccdba0a310cf3e3557755f.html

^^^has a video

Edited by tater
Link to comment
Share on other sites

5 minutes ago, tater said:

The link doesn't go to a page about the hover test that I can tell. Also, the 2 images are not linked properly and don't show.

It did go to the weibo post from CCTV News and CNSA about it, and there maybe connection problem of Weibo server if you can't load that. Now I replace all of them with imgur link

Link to comment
Share on other sites

1 minute ago, 050644zf said:

It did go to the weibo post from CCTV News and CNSA about it, and there maybe connection problem of Weibo server if you can't load that. Now I replace all of them with imgur link

:o

Saw the video, but no sense of the scale of that rig... impressive.

Link to comment
Share on other sites

Its really quite shocking to compare this to the equivalent plans from NASA, which just seam to amount to 'Let's land someone on the moon, then maybe we'll make use of lunar ice.' That's a very good goal, but without being slotted into a larger overall plan like this, it's kind of pointless. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...