A three-plate-type polarization state generator(PSG) was designed and the transformation of Stokes parameters was derived according to the structure characteristics of PSG. Based on the principle of Tabu Search(referred to as TS) algorithm, a control algorithm was proposed which was able to not only achieve the rapid transformation between the polarization states but also reduce the bias-voltage across the crystal. The simulation results show that, by using this control algorithm, the PSG can transform the linear polarization into arbitrary polarization and the precision can arrive to 0.07%. If the Stokes parameter S₂ and S₃ were restricted to the specific region on the Poincare sphere, the desired polarization state was generated by this control algorithm and the control voltage amplitude was ensured within 120 V. Last, the experimental results show that， this control algorithm could satisfy the requirement of encoding in continuous variables coherent optical communication of single beam.