Figure 2

The state trajectory of ${\mathit{x}}_{\mathbf{1}}\mathbf{(}\mathit{t}\mathbf{)}$ , ${\mathit{x}}_{\mathbf{2}}\mathbf{(}\mathit{t}\mathbf{)}$ of the model ( 27 ) with ${\mathit{J}}_{\mathbf{1}}\mathbf{=}\mathbf{0}$ , ${\mathit{J}}_{\mathbf{2}}\mathbf{=}\mathbf{0}$ and initial conditions ${\mathit{\varphi }}_{\mathbf{1}}\mathbf{(}\mathit{s}\mathbf{)}\mathbf{=}\mathbf{4}\mathbf{+}\mathbf{4}\mathbf{sin}\frac{\mathbf{2}}{\mathbf{3}}\mathit{\pi }\mathit{s}$ , ${\mathit{\varphi }}_{\mathbf{2}}\mathbf{(}\mathit{s}\mathbf{)}\mathbf{=}\mathbf{3}\mathbf{+}\mathbf{2}\mathbf{|}\mathbf{cos}\frac{\mathbf{2}}{\mathbf{3}}\mathit{\pi }\mathit{s}\mathbf{|}$ , $\mathit{s}\mathbf{\in }\mathbf{[}\mathbf{-}\mathbf{1}\mathbf{,}\mathbf{0}\mathbf{]}$ .