Electronic Journal of Differential Equations, Vol. 2001(2001), No. 27, pp. 1-15. Title: Bilinear spatial control of the velocity term in a Kirchhoff plate equation Authors: Mary Elizabeth Bradley (Univ. of Louisville, KY, USA) Suzanne Lenhart (Univ. of Tennessee, TN, USA) Abstract: We consider a bilinear optimal control problem with the state equation being a Kirchhoff plate equation. The control is a function of the spatial variables and acts as a multiplier of the velocity term. The unique optimal control, driving the state solution close to a desired evolution function, is characterized in terms of the solution of the optimality system. Submitted July 26, 2000. Published May 1, 2001. Math Subject Classifications: 49K20, 35F10. Key Words: Kirchhoff plate; optimal control; bilinear control.