A Piezo-Actuated High-Precision Flexible Parallel Pointing Mechanism: Conceptual Design, Development, and Experiments

A high-precision pointing mechanism for intersatellite optical communication is presented in this paper, which employs flexure hinges as the passive joints and orients its moving platform by means of six piezoelectric actuators. The proposed mechanism features submicroradian resolution and microradian repeatability within a submilliradian pointing range. A corner-filleted flexure hinge considering manufacturing tolerance with high motion accuracy and large displacement is designed based on performance analysis, and the theoretical analysis is also validated by FEA simulation and experimental testing within a 5% error margin. The parameters of the parallel mechanism are synthesized by multiobjective optimization on the basis of inverse kinematics model. Moreover, the workspace determination and the FEA analysis of the optimized mechanism are also performed. Finally, a high-precision pointing prototype is fabricated and the performance testing has been implemented, which validate the effectiveness of the proposed system.

[1]  Max Eigenmann,et al.  DEVELOPMENT OF A FINE POINTING AND TRIM MECHANISM , 2011 .

[2]  Zhi-jiang Du,et al.  Kinematics modeling of a 6-PSS parallel mechanism with wide-range flexure hinges , 2012 .

[3]  J. R. Hutchinson.  Shear coefficients for Timoshenko beam theory , 2001 .

[4]  Xu Min,et al.  Modeling and design of a novel precision tilt positioning mechanism for inter-satellite optical communication , 2009 .

[5]  Brij N. Agrawal,et al.  Development of a Hexapod Laser-based Metrology System for Finer Optical Beam Pointing Control , 2004 .

[6]  Wei Dong,et al.  Development of a parallel kinematic motion simulator platform , 2013 .

[7]  Lining Sun,et al.  Design of a precision compliant parallel positioner driven by dual piezoelectric actuators , 2007 .

[8]  DebK.,et al.  A fast and elitist multiobjective genetic algorithm , 2002 .

[9]  J. E. McInroy,et al.  Modeling and design of flexure jointed Stewart platforms for control purposes , 2002 .

[10]  Lorenzo Zago,et al.  Small parallel manipulator for the active alignment and focusing of the secondary mirror of the VLTI ATS , 2000, Astronomical Telescopes and Instrumentation.

[11]  Zhen Gao,et al.  Flexure Parallel Mechanism: Configuration and Performance Improvement of a Compact Acceleration Sensor , 2012 .

[12]  Zoran Sodnik,et al.  Overview of the inter-orbit and the orbit-to-ground laser communication demonstration by OICETS , 2007, SPIE LASE.

[13]  Jean-Pierre Merlet,et al.  Stability Analysis of Underconstrained Cable-Driven Parallel Robots , 2013, IEEE Transactions on Robotics.

[14]  Koichi Shiratama,et al.  Wide-range fine pointing mechanism for free-space laser communications , 2004, SPIE Optics + Photonics.

[15]  Kalyanmoy Deb,et al.  A fast and elitist multiobjective genetic algorithm: NSGA-II , 2002, IEEE Trans. Evol. Comput..

[16]  Nigel Phillips,et al.  THE USE AND ADVANCEMENT OF AN AFFORDABLE , ADAPTABLE ANTENNA POINTING , 2011 .

[17]  J. Angeles.  The Qualitative Synthesis of Parallel Manipulators , 2004 .

[18]  Wei Dong,et al.  A gas bubble-based parallel micro manipulator: conceptual design and kinematics model , 2012 .

[19]  W. Dong,et al.  Note: A novel integrated microforce measurement system for plane-plane contact research. , 2010, The Review of scientific instruments.

[20]  Qingsong Xu,et al.  Design and Analysis of a Totally Decoupled Flexure-Based XY Parallel Micromanipulator , 2009, IEEE Transactions on Robotics.

[21]  E. Papadopoulos,et al.  DESIGN OF A REACTIONLESS POINTING MECHANISM FOR SATELLITE ANTENNAS , 2011 .