slide1 l.
Download
Skip this Video
Download Presentation
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Loading in 2 Seconds...

play fullscreen
1 / 26

Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions - PowerPoint PPT Presentation


  • 141 Views
  • Uploaded on

Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions Ossama Abdelkhalik Assistant Professor Michigan Technological University Department of Mechanical Engineering. Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions. Background and Motivation.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions' - britain


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Minimum-Fuel Orbit Design/Transfer in Earth Orbiting MissionsOssama AbdelkhalikAssistant ProfessorMichigan Technological UniversityDepartment of Mechanical Engineering

minimum fuel orbit design transfer in earth orbiting missions
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Background and Motivation

  • Considering a remote sensing mission:
    • The orbit selection dictates:
      • Ground resolution,
      • Area coverage, and
      • Frequency of coverage parameters.
    • Electric propulsion systems are used at low altitudes for drag compensation.
minimum fuel orbit design transfer in earth orbiting missions3
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions
  • Low altitude orbits = lack of coverage.
  • Electric propulsion to increase coverage in selected regions.
minimum fuel orbit design transfer in earth orbiting missions4
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Typical example is to have a set of 20 sites on the terrestrial surface to be visited within 50 days.

minimum fuel orbit design transfer in earth orbiting missions5
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Objective of Research

  • Find orbits that enable remote sensing missions with minimum usage for propulsion systems
minimum fuel orbit design transfer in earth orbiting missions6
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Technical Approach

  • Natural orbit: Ground track of a natural orbit passes through the sites without propulsion
  • Propulsion compensates perturbations
  • For a given set of sites:

search for the natural orbit

minimum fuel orbit design transfer in earth orbiting missions7
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions
  • Optimization problem
  • Penalty function: how far is
  • the orbit from being an exact natural solution.
  • Penalty function depends on mission objectives.
    • Maximum Resolution Mission
    • Maximum Observation Time Mission
minimum fuel orbit design transfer in earth orbiting missions11
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Golman and Kogan: Active Solution for this case implements thrusters continuously all time, fuel consumption 5g/day, thrust level of 1mm/s2

minimum fuel orbit design transfer in earth orbiting missions12
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions
  • In case the solution is not satisfactory, the set of sites, S, is split into two subsets, S1 and S2.
minimum fuel orbit design transfer in earth orbiting missions13
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions
  • Find the optimal split to minimize the mission cost:
    • The cost of orbit transfer between the orbits of the different subsets of sites
    • The cost of each subset orbit
minimum fuel orbit design transfer in earth orbiting missions14
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions
  • Given S={1,2,3,… N}

find the optimal split subsets S1 and S2

minimum fuel orbit design transfer in earth orbiting missions15
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions
  • Using GA to find minimum-fuel orbit transfer solutions
  • GA is successfully implemented for impulsive orbit transfers
minimum fuel orbit design transfer in earth orbiting missions16
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

N-Impulse Orbit

Transfer

Cost function:

J = ΣΔv

New Formulation

proposed using GA

minimum fuel orbit design transfer in earth orbiting missions22

Solution

ΔiI

ΔiF

ΔvKm/sec

Optimal

3.305

25.195

4.05897

Final

3.244

25.256

4.0590

GA

3.300

25.257

4.0610

Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Parking to GEO Transfer

minimum fuel orbit design transfer in earth orbiting missions23
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

To be developed:

  • Optimal splitting algorithm
  • Optimal orbit transfer using GA for continuous thrust systems
  • Develop minimum-fuel solutions for dynamic targets
minimum fuel orbit design transfer in earth orbiting missions24

Updated Orbit

Current Orbit

Dynamic Target at its previous location

2

1

After moving

Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

To be developed:

  • Develop minimum-fuel solutions for dynamic targets
minimum fuel orbit design transfer in earth orbiting missions25
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Anticipated Results

Proposed solution

Guelman and Kogan solution

minimum fuel orbit design transfer in earth orbiting missions26
Minimum-Fuel Orbit Design/Transfer in Earth Orbiting Missions

Anticipated Results

Proposed solution

Guelman and Kogan solution