Fig. 1. Decomposition of six-axis acceleration

Fig. 2. Prototype of a parallel type six-axis accelerometer^［11］

Fig. 3. Ocean wave buoy designed by Nanjing University of Information Science and Technology^［14］

Fig. 4. Three types of multibody systems based on Stewart type parallel mechanisms

Fig. 5. Six-DOF Stewart hand designed by Harvard University^［18］

Fig. 6. Space robot designed by Harbin Institute of Technology^［19］

Fig. 7. Schematic of “12-6” Stewart-type parallel mechanism

Fig. 8. Schematic of “9-3” Stewart-type parallel mechanism

Fig. 9. Schematic of “12-8” Stewart-type parallel mechanism

Fig. 10. Schematic of “12-4” Stewart-type parallel mechanism

Fig. 11. Three-dimensional rotation table designed by University of Freiburg^［48］

Fig. 12. Calibration platform for six-axis acceleration designed by Yanshan University^［50］

Fig. 13. Structure of micro-vibration platform designed by University of Chinese Academy of Sciences^［51］

Fig. 14. Six-axis acceleration calibration platform designed by Nanjing Forestry University^［52］

Fig. 15. Geometric reconfiguration and topological reconfiguration of parallel mechanism

Fig. 16. Schematic of “9-4” Stewart-type parallel mechanism

Fig. 17. Trinity theory of 'performance-structure-excitation'