STUDY ON ASSESSMENT METHOD FOR SPACE SCIENCE REQUIREMENT SATISFACITON BASED ON ANP MODEL. Ligang Li SECESA /10/2014

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1 STUDY ON ASSESSMENT METHOD FOR SPACE SCIENCE REQUIREMENT SATISFACITON BASED ON ANP MODEL Ligang Li SECESA /10/2014

2 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCULATION 6. EXPERIMENT 7. CONCLUSION

To assess space science mission requirement satisfaction degree is an important work in the

3 INTRODUCTION The space science mission requirement satisfaction is the ability to achieve and meet mission objectives and requirement s through technical implement. To assess space science mission requirement satisfaction degree is an important work in the concept design and project demonstrate phase. Mission Satisfaction Degree 100% 80% 60% 40% 20% 0%

4 Existing Problems INTRODUCTION Difficulty to describe the relationship between indexes based on traditional methods. Difficulty to perform quantification assessment Project1 Index1 Index Which is better? Project2 Index1 Index

5 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCUATION 6. EXPERIMENT 7. CONCLUSION

6 OVERVIEW OF ANP MODEL ANP: The Analytic Network Process With feedback the alternatives depend on the criteria as in a hierarchy but may also depend on each other. The criteria themselves can depend on the alternatives and on each other as well. Feedback improves the priorities derived from judgments and makes prediction much more accurate.

7 OVERVIEW OF ANP MODEL C 4 C 1 Arc from component C 4 to C 2 indicates the outer dependence of the elements in C 2 on the elements in C 4 with respect to a common property. Feedback C 2 C 3 Loop in a component indicates inner dependence of the elements in that component with respect to a common property.

8 OVERVIEW OF ANP MODEL Goal Control Layer Dependence Feedback CriterionP 1 CriterionPn Cluster C 1 Cluster C 2 Net Layer SuperMatrix Cluster Cluster Cluster C m Index Weight Index System of Network Structure Index Weight Processing

9 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCULATION 6. EXPERIMENT 7. CONCLUSION

10 Mission Characterization Orbit requirement Attitude requirement Payload requirement Coverage requirement Structure requirement Thermal requirement Launch requirement Power requirement

11 Mission Characterization ID Index Cluster Dependence Illustration (Depend on) C1 Attitude Index Cluster C3 Payload work mode affects attitude C2 Orbit Index Cluster C1 Attitude control precision affects orbit control precision C7 Launching ability affects orbit injection precision C3 Payload Index C1 Attitude stability affects payload detection ability Cluster C5 Structure layout affects payload installation C7 Launching ability affects payload configuration and C8 Thermal control constraint affects payload work environment C9 Energy constraint affects payload detection ability C4 Coverage Index C1 Attitude Pointing Precision affects coverage range Cluster C2 Orbit ability affects coverage range C5 Structure Index C8 Thermal control constraint affects structure layout Cluster C6 Measurement & Control/Communication C1 Attitude pointing affects measurement & control/communication Index Cluster C2 Orbit affects ground station visibility C7 Launching Index C2 Orbit constrain affects launching requirement Cluster C8 Thermal Control C2 Orbit solar elevation affects thermal control Index Cluster C9 Energy Index C1 Attitude pointing affects energy Cluster C2 Orbit solar elevation affects energy

12 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCULATION 6. EXPERIMENT 7. CONCLUSION

13 Index System Using Network

14 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCULATION 6. EXPERIMENT 7. CONCLUSION

15 Main Process Flow Assessment Calculation

16 Index Weight Calculation Assessment Calculation

17 Assessment Calculation Index Quantization & Normalization Numerical Index Type Qualitative Index Type YES NO

18 Assessment Calculation Assessment Comprehensive Calculation

19 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCUATION 6. EXPERIMENT 7. CONCLUSION

20 Experiment Index System Construction Goal: Attitude/Orbit subsystem requirement satisfaction assessment Index system construction using tradition method as shown in Fig.1. Index system construction using proposed method as shown in Fig.2. Fig.1. index system using AHP Fig.2. index system using ANP Dependence and feedback between indexes are considered in the proposed method!

21 Index Weight Calculation Experiment Fig.3. index weight based on hierarchy structure Fig.4. index weight based on network structure The proposed method is more reasonable and valid!

22 Table of Contents 1. INTRODUCTION 2. OVERVIEW OF ANP MODEL? 3. MISSION CHARACTERIZATION 4. INDEX SYSTEM USING NETWORK STRUCTURE 5. ASSESSMENT CALCULATION 6. EXPERIMENT 7. CONCLUSION

23 CONCLUSION According to the ANP model, space science mission requirement satisfaction assessment is studied. Through experiment, we verified the proposed method s validity. Although we have done some work, there are still some problems in the study of proposed method, detailed experiment to apply proposed method to practice of space mission assessment

24 Thank You! Questions?

THE CONCURRENT DESIGN PLATFORM AND THE PRIVATE CLOUD FOR SPACE SCIENCE. Yang Zhen SECESA2012 18/10/2012

THE CONCURRENT DESIGN PLATFORM AND THE PRIVATE CLOUD FOR SPACE SCIENCE Yang Zhen SECESA2012 18/10/2012 Table of Contents 1. INTRODUCTION 2. WHY DO WE NEED A PRIVATE CLOUD? 3. CONCEPTUAL MISSION DESIGN