Experiments
A tensegrity robot inspired from the bird neck

The trajectory used for the control tests involves movement in the same direction for all three X-joints. This movement seems to be the most interesting for accessing a large workspace with reasonable forces. Starting from the straight configuration, the manipulator moves to α^d = [50°, 50°, 50°]^T, returns to the straight configuration, then moves to α^d = [–30°, –40°, –50°]^T, and finally returns to the straight configuration. All the desired joint configurations are linked by cycloidal functions. The four main trajectory configurations are shown in figure 27.