Satellite simulator with a hydraulic manipulator

A system emulation that can be used for testing a spacecraft control system with all of its hardware in place, in a 1-g laboratory environment, is presented. The system is comprised of a manipulator whose end-effector rigidly grasps a functional spacecraft, a six-axis force/moment (F/M) sensor placed at the interface of the spacecraft and the manipulator, and a control system. The controller takes the values of the force/moment as well as the manipulator's joint angles and velocities and issues torque command to drive the manipulator so that the motion of the spacecraft model in the presence of external forces replicates 0-g motion dynamics of a flight spacecraft. The control system can also modify the inertia! properties of the spacecraft so as to match those of an actual spacecraft, even if the latter is flexible and the former is rigid. The stability of the overall system is analytically investigated, and the results show that the system remains stable provided that the inertia! properties of two spacecraft are different. Important practical issues such as calibration and analysis of the sensitivity to noise and disturbance are also presented. Finally, the concept of the 0-g emulation of spacecraft is demonstrated by conducting an experiment using a robotic testbed at the Canadian Space Agency (CSA)

[1]  William Thomson.  Introduction to Space Dynamics , 1961 .

[2]  James R. Wertz,et al.  Spacecraft attitude determination and control , 1978 .

[3]  Mark W. Spong,et al.  Robot dynamics and control , 1989 .

[4]  James R. French,et al.  Space vehicle design , 1991 .

[5]  William K. Durfee,et al.  Design and implementation of a laboratory test bed for space robotics: the VES mod II , 1994 .

[6]  Jonathan P. How,et al.  Space construction: an experimental testbed to develop enabling technologies , 1997, Other Conferences.

[7]  Jonathan P. How,et al.  EXPERIMENTAL DEMONSTRATION OF GPS AS A RELATIVE SENSOR FOR FORMATION FLYING SPACECRAFT , 1998 .

[8]  Stuart Kramer,et al.  SIMSAT - A satellite simulator and experimental test bed for Air Force research , 1999 .

[9]  Howie Choset,et al.  Path Planning and Control for Free-Flying Inspection Robot in Space , 1999 .

[10]  F. Perez,et al.  SPHERES: A Testbed For Long Duration Satellite Formation Flying In Micro-Gravity Conditions , 2000 .

[11]  D. F. Golla,et al.  ODIN Attitude Control System Testing - An International Collaboration , 2000 .

[12]  Brigitte Kaldeich-Schürmann.  4th ESA International Conference on Spacecraft Guidance, Navigation, and Control Systems : and tutorial on modern and robust control, theory, tools and applications, 18-21 October 1999, ESTEC, Noordwijk, The Netherlands , 2000 .

[13]  Saburo Matunaga,et al.  Ground experiment system for dual-manipulator-based capture of damaged satellites , 2000, Proceedings. 2000 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2000) (Cat. No.00CH37113).

[14]  Satomi Kawamoto,et al.  Ground Experiment of Mechanical Impulse Method for Uncontrollable Satellite Capturing , 2001 .

[15]  Farhad Aghili,et al.  A Combined Scheme for Identification and Robust Torque Control of Hydraulic Actuators , 2003 .

[16]  Mason A. Peck,et al.  Historical review of air-bearing spacecraft simulators , 2003 .

[17]  Kazuya Yoshida,et al.  Engineering Test Satellite VII Flight Experiments for Space Robot Dynamics and Control: Theories on Laboratory Test Beds Ten Years Ago, Now in Orbit , 2003, Int. J. Robotics Res..

[18]  Kazuya Yoshida,et al.  Dynamics, control and impedance matching for robotic capture of a non-cooperative satellite , 2004, Adv. Robotics.