Optimal design of acceleration isotropy based active vibration isolation stewart platform for spaceborne optical Instrument
TONG Zhi-zhong1；DUAN Guan-ren2; HE Jing-feng1；JIANG Hong-zhou1
1. Harbin Institute of Technology, School of Mechatronics Engineering, Harbin 1500010, China;
2. Harbin Institute of Technology, School of Astronautics, Harbin 1500010, China
Abstract：To ensure high precision spaceborne optical instruments with natural precision, Stewart platforms was adopted as multi-dimension active vibration isolation system. Considering the mass geometry characteristics of the payload, analytical formulations of acceleration isotropy was derived based on the concept of acceleration isotropy. It discovers the relations between isotropy, architecture and characteristics of the payload. The formulation of compliant center was also deduced analytically. An invariable measure of any isotropy Stewart platform was given. The optimal design using motion orthogonality and acceleration isotropy was proposed to decrease the nonlinear and coupled affections, and a routine was established to generate a class of active vibration isolation Stewart platforms with acceleration isotropy.
2012, Vol. 31 
