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STRA ST RATOSPHERIC OSPHERIC FLI LIGHT T ON ON THE BAL ALLO - PowerPoint PPT Presentation

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POLA LARIS IS EXP XPERIM ERIMENT ENT: : DATA COLL LLEC ECTE TED D DURING RING THE STRA ST RATOSPHERIC OSPHERIC FLI LIGHT T ON ON THE BAL ALLO LOON ON BEXU XUS18 S18 D. Paganini, C. Cacco, F. Cipriani, F. Cocco, T. Cortese, R.

  1. POLA LARIS IS EXP XPERIM ERIMENT ENT: : DATA COLL LLEC ECTE TED D DURING RING THE STRA ST RATOSPHERIC OSPHERIC FLI LIGHT T ON ON THE BAL ALLO LOON ON BEXU XUS18 S18 D. Paganini, C. Cacco, F. Cipriani, F. Cocco, T. Cortese, R. Dalla Vecchia, M. La Grassa, M. Lora, M. Zorzan F. Branz, L.Olivieri, F. Sansone, A, Francesconi

  2. polAris PRESENTATION OVERVIEW 1. RADIATOR CONCEPT 2. POLARIS EXPERIMENT 3. SETUP EVOLUTION DURING RX/BX PROGRAMME 4. FLIGHT DATA 5. LESSONS LEARNED & CONCLUSIONS 1 ° SSA Symposium - Padova 10 December 2015

  3. polAris RADIATOR CONCEPT Heat radiators are designed to manage the heat of P/L Internal Generation Variable P/L activity and Environment heat fluxes require FLEXIBILITY & CONTROL on RADIATORS PERFORMANCE 1 ° SSA Symposium - Padova 10 December 2015

  4. polAris RADIATOR CONCEPT The radiator is composed by three metallic plates linked together so that an actuation system can put them in good thermal contact or separate them TWO GEOMETRY CONFIGURATIONS 22 ° ESA PAC Symposium - Tromso 10 December 2015

  5. polAris RADIATOR CONCEPT The radiator is composed by three metallic plates linked together so that an actuation system can put them in good thermal contact or separate them TIGHENED NED CONFI FIGUR URATION ATION CONDUCTIVE LINK BETWEEN THE PLATES LOWER EQUIVALENT THERMAL RESISTANCE MAXIMUM XIMUM HEAT EXCHA HANGE GE 22 ° ESA PAC Symposium - Tromso 10 December 2015

  6. polAris RADIATOR CONCEPT The radiator is composed by three metallic plates linked together so that an actuation system can put them in good thermal contact or separate them OPEN CONFI FIGUR URATION ATION RADIATIVE LINK BETWEEN THE PLATES HIGHER EQUIVALENT THERMAL RESISTANCE MINIMUM IMUM HEAT EXCHA HANGE NGE 1 ° SSA Symposium - Padova 10 December 2015

  7. polAris RADIATOR CONCEPT The radiator is composed by three metallic plates linked together so that an actuation system can put them in good thermal contact or separate them TIGHENED NED CONFI FIGUR URATION ATION OPEN CONFI FIGUR URATION ATION CONDUCTIVE LINK RADIATIVE LINK BETWEEN THE PLATES BETWEEN THE PLATES LOWER EQUIVALENT HIGHER EQUIVALENT THERMAL RESISTANCE THERMAL RESISTANCE MAXIMUM XIMUM HEAT EXCHA HANGE GE MINIMU IMUM HEA EAT EX EXCHANGE HANGE LINEAR ACTUATION 1 ° SSA Symposium - Padova 10 December 2015

  8. polAris PRESENTATION OVERVIEW 1. RADIATOR CONCEPT 2. POLARIS EXPERIMENT 3. SETUP EVOLUTION DURING RX/BX PROGRAMME 4. FLIGHT DATA 5. LESSONS LEARNED & CONCLUSIONS 1 ° SSA Symposium - Padova 10 December 2015

  9. polAris POLARIS EXPERIMENT POLymer Actuated Radiator with Independent Surfaces 1. Test a new concept of heat radiator in variable environmental conditions 2. Control the radiator to guarantee the thermal steadiness of a dummy payload 3. Compare the numerical thermal model with the measured data 1 ° SSA Symposium - Padova 10 December 2015

  10. polAris POLARIS EXPERIMENT • POLARIS Setup flew into stratosphere on October 2014 • Aluminium Radiator Prototype • Two Independent Actuation Systems for the radiator movement • Set of sensors for full radiator performance evaluation 1 ° SSA Symposium - Padova 10 December 2015

  11. polAris POLARIS EXPERIMENT LINEAR ACTUATION DIELECTRIC ELECTRIC ELASTOMER LINEAR ACTUATORS ACTUATOR Reliable and Accurate Completely manufactured in the University facilities 1 ° SSA Symposium - Padova 10 December 2015

  12. polAris POLARIS EXPERIMENT LINEAR ACTUATION DIELECTRIC ELECTRIC ELASTOMER LINEAR ACTUATORS ACTUATOR Reliable and Accurate Completely manufactured in the University facilities 1 ° SSA Symposium - Padova 10 December 2015

  13. polAris POLARIS EXPERIMENT Basically they are COMPLIANT CAPACITORS High Voltage ON High Voltage OFF Wrapping it around a compressed coil spring is possible to obtain a LINEA EAR ACTUATOR UATOR 1 ° SSA Symposium - Padova 10 December 2015

  14. polAris POLARIS EXPERIMENT 1 ° SSA Symposium - Padova 10 December 2015

  15. polAris POLARIS EXPERIMENT LINEAR ACTUATION DIELECTRIC ELECTRIC ELASTOMER LINEAR ACTUATORS ACTUATOR Reliable and Accurate Completely manufactured in the University facilities 1 ° SSA Symposium - Padova 10 December 2015

  16. polAris POLARIS EXPERIMENT 1 ° SSA Symposium - Padova 10 December 2015

  17. polAris POLARIS EXPERIMENT A complete set of sensors was included in the setup, monitoring both radiator temperatures and environment boundary conditions SPOT MEASUR ASURE Temperature Dummy Payload Voltage Amperage Inner Radiator Temperature and its Plate spatial distribution Outer Radiator Temperature and its Plate spatial distribution Plates Supports Plates position Pressure Environment Incoming Visible Radiation Boundary Incoming IR Radiation Condition Temperature 1 ° SSA Symposium - Padova 10 December 2015

  18. polAris PRESENTATION OVERVIEW 1. RADIATOR CONCEPT 2. POLARIS EXPERIMENT 3. SETUP EVOLUTION DURING RX/BX PROGRAMME 4. FLIGHT DATA 5. LESSONS LEARNED & CONCLUSIONS 1 ° SSA Symposium - Padova 10 December 2015

  19. polAris DURING RX/BX (PROPOSAL)  Mission Concept  Mission Objectives Experiment MASS: 4 Kg Experiment DIMENSIONS: 30 X 30 X 30 cm 1 ° SSA Symposium - Padova 10 December 2015

  20. polAris DURING RX/BX (SW)  Preliminary WBS  8 DE Actuators configuration  Experiment divided in 3 main sections Experiment MASS: 5 Kg Experiment DIMENSIONS: 40 X 30 X 30 cm 1 ° SSA Symposium - Padova 10 December 2015

  21. polAris DURING RX/BX (SW) 1 ° SSA Symposium - Padova 10 December 2015

  22. polAris DURING RX/BX (PDR)  First version of the S.E.D.  Definition of the WBS  Definition of the Experiment REQUIREMENTS 1 ° SSA Symposium - Padova 10 December 2015

  23. polAris DURING RX/BX (PDR)  Design of the Radiator Assembly  Preliminary Design of the Actuation System  Preliminary Design of the Backup A.S. Experiment MASS: 12 Kg Experiment DIMENSIONS: 46 X 34 X 36 cm 1 ° SSA Symposium - Padova 10 December 2015

  24. polAris DURING RX/BX (PDR) 1 ° SSA Symposium - Padova 10 December 2015

  25. polAris DURING RX/BX (CDR) POLARIS Experiment DESIGN completed Experiment MASS: 15 Kg Experiment DIMENSIONS: 46 X 38 X 40 cm 1 ° SSA Symposium - Padova 10 December 2015

  26. polAris DURING RX/BX (CDR) 1 ° SSA Symposium - Padova 10 December 2015

  27. polAris DURING RX/BX (IPR) 1 ° SSA Symposium - Padova 10 December 2015

  28. polAris DURING RX/BX (IPR) FORC RCE DEFORMAT EFORMATION ION 7 6 FORCE [N] 5 4 All the tested actuators show 3 maximum DEF EFORM ORMATION ATIONS S OF 5 M MM, , 2 but limited performance for the 1 mechanism requirements 0 0 1000 2000 3000 4000 5000 VOLTAGE [V] 1 ° SSA Symposium - Padova 10 December 2015

  29. polAris DURING RX/BX (IPR) 1 ° SSA Symposium - Padova 10 December 2015

  30. polAris DURING RX/BX (EAR) 1 ° SSA Symposium - Padova 10 December 2015

  31. polAris DURING RX/BX (EAR) 1 ° SSA Symposium - Padova 10 December 2015

  32. polAris DURING RX/BX (LAUNCH CAMPAIGN) 1 ° SSA Symposium - Padova 10 December 2015

  33. polAris PRESENTATION OVERVIEW 1. RADIATOR CONCEPT 2. POLARIS EXPERIMENT 3. SETUP EVOLUTION DURING RX/BX PROGRAMME 4. FLIGHT DATA 5. LESSONS LEARNED & CONCLUSIONS 1 ° SSA Symposium - Padova 10 December 2015

  34. polAris FLIGHT DATA The setup flew into stratosphere on-board the balloon BEXUS18 from the ESRANGE Space Center (9 October 2014) 1 ° SSA Symposium - Padova 10 December 2015

  35. polAris FLIGHT DATA - ENVIRONMENT 1 ° SSA Symposium - Padova 10 December 2015

  36. polAris FLIGHT DATA - ENVIRONMENT 1 ° SSA Symposium - Padova 10 December 2015

  37. polAris FLIGHT DATA - ENVIRONMENT 1 ° SSA Symposium - Padova 10 December 2015

  38. polAris FLIGHT DATA - ENVIRONMENT 1 ° SSA Symposium - Padova 10 December 2015

  39. polAris FLIGHT DATA - RADIATOR 1 ° SSA Symposium - Padova 10 December 2015

  40. polAris FLIGHT OUTCOMES 1 ° SSA Symposium - Padova 10 December 2015

  41. polAris FLIGHT OUTCOMES 1 ° SSA Symposium - Padova 10 December 2015

  42. polAris PRESENTATION OVERVIEW 1. RADIATOR CONCEPT 2. POLARIS EXPERIMENT 3. SETUP EVOLUTION DURING RX/BX PROGRAMME 4. FLIGHT DATA 5. LESSONS LEARNED & CONCLUSIONS 1 ° SSA Symposium - Padova 10 December 2015

  43. polAris LESSONS LEARNED & CONCLUSIONS • Despite of an unexpected flight condition, it was possible to prove functionality and potentialities of this concept of radiator • Experiment bus & software were perfectly functional during the whole flight • Dielectric Elastomers Actuators manufacturing process was developed, even though the DEs performance were not enough to fulfill the experiment requirements • New model was developed and post flight work was focused on vacuum test to characterize the radiator performance in a more stable environment 1 ° SSA Symposium - Padova 10 December 2015

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