Novel compliant linear guiding mechanism and analysis of kinetic precision

By analyzing the pseudo-rigid-body model of a Roberts mechanism,the location of point P was optimized to maximize the straight-line distance.A method based on the contour map of linearity was proposed to estimate the optimal value,and then the finite element analysis was used for a better adjustment.A compliant guiding mechanisms was designed and fabricated,for the linear guiding mechanism could be constructed by two Roberts mechanisms in parallel. The finite element analysis and experimental results show that after optimization, the axis-offset can be less than 1 μm while its stroke is large than 1 mm,which shows that this kinds of guiding mechanism can satisfy the requirements of large stroke and precision.