Forward Displacement Analysis of a Non-Plane Two Coupled Degree Nine-Link Barranov Truss Based on the Hyper-Chaotic Least Square Method

The hyper‐chaotic least square method for finding all of the real solutions of nonlinear equations was proposed and the following displacement analysis on the 33rd non‐plane 2‐coupled–degree nine‐link Barranov truss was completed. Four constrained equations were established by a vector method with complex numbers according to four loops of the mechanism, and four supplement equations were also established by increasing four variables and the relation of the sine and cosine functions. The established eight equations are those of the forward displacement analysis of the mechanism. In combining the least square method with hyper‐chaotic sequences, a hyper‐chaotic least square method based on utilizing a hyper‐chaotic discrete system to obtain and locate initial points so as to find all the real solutions of the nonlinear questions was proposed. A numerical example was given. A comparison was also done with another means of finding a solution method. The results show that all of real solutions were quickly obtained, and it proves the correctness and validity of the proposed method