CNES Research and Technology activities on Formation Flying

1
CNES Research and Technology activities on
Formation Flying
D. SÉGUÉLA dominique.seguela_at_cnes.fr MJ.
LEFÈVRE-FONOLLOSA marie-jose.lefevre_at_cnes.fr
CNES DCT/DA/RT
2
Formation Flying a technological
challenge covering several domains

• at system level
• distributed architecture (space and ground)
• autonomy
• distributed FDIR
• system verification and validation

• at satellite level
• relative metrology
• RF and optical
• accurate control
• relative position and attitude
• flight dynamics
• actuators
• Inter Satellite Link
• software architecture

• at instrument level
• optical nulling technologies
• interferometric laboratoy test bench
• nulling interferometer for Pegase, Darwin
• laser optical test equipments for LISA
• gamma-ray diffractive lens
• detectors IR, X and Gamma ray
• cooling
• innovative future instrumentation concepts

3
Main goals for CNES RT studies
To master formation flying key technologies to be
able to perform ground demonstrations as early as
2006 and in-flight demonstrations in 2010/2012

• from 2004 to end 2005
• during phases 0 for Astronomy (ASPICS MAX PEGASE
  SIMBOL-X)
• to master generic FF key technologies
• from 2006
• after CPS (Scientific Program Committee)
  recommendations
• to concentrate on FF technologies useful for
  SIMBOL-X
• to prepare PEGASE
• to work on MAX payload

4
What we are working on at system/satellite level
Flight dynamics and GNC
Control/Command
PRISMA in-flight operations
deployment formation acquisition coarse formation
control manoeuvers fine formation control
on-board/ground activities management FDIR collis
ion avoidance
RT simulators and ground test benches
functional chains and system
Ground validation
5
What we are working on at satellite/equipment
level
PRISMA
Metrology
Actuation / Propulsion
complementary studies on existing actuators -
plume effects and contamination (Cs) - diphasic
storage for cold gas - micro-balance alternative
actuators optical delay line tip/tilt mirrors
RF sensor coarse lateral sensor fine star
sensor fine longitudinal sensor fringe sensor
SIMBOL-X
PEGASE
PEGASE
6
What we are working on at instrument level
Pegase
Darwin
Simbol X, Max
Xeus
Max
All
7
Thank you for your attention !
D. SÉGUÉLA dominique.seguela_at_cnes.fr MJ.
LEFÈVRE-FONOLLOSA marie-jose.lefevre_at_cnes.fr
CNES DCT/DA/RT