Geometric　nonlinearities　of　the　beam　and　piezoelectric　patch　are　considered.　Velocity　feedback　control　algorithm　is　implemented　applying　piezoelectric　materials.　The　equation　of　motion　of　the　system　is　established　using　Hamilton＇s　principle.　The　effects　of　control　gains　on　primary　resonance　properties　of　the　beam　are　studied.　It　is　observed　that,　with　the　amplitude　of　external　excitation　increasing,　the　amplitude　of　resonance　curve　increases.　The　velocity　feedback　control　can　improve　unstable　resonance　of　the　beam.　When　the　control　gain　is　increased　to　a　certain　value,　the　unstable　regions　in　the　resonance　and　amplitude-frequency　curves　disappear.