The　active　vibration　control　of　a　composite　piezoelectric　cantilever　beam　is　investigated　in　this　paper.　The　intermediate　layer　of　the　beam　is　made　of　the　graphene　platelets　reinforced　porous　nanocomposite,　and　the　piezoelectric　actuator　and　sensor　adhere　to　the　top　and　bottom　surfaces　of　the　intermediate　layer.　The　symmetric　distribution　(PD-X　and　PD–O)　and　uniform　distribution　(PD-U)　of　porosity　are　taken　into　account.　The　graphene　platelets　used　to　enhance　material　properties　consider　three　distribution　forms,　the　symmetric　pattern　(GPL-X　and　PD–O)　and　uniform　pattern　(GPL-U).　Computing　the　effective　Young＇s　modulus,　Poisson＇s　ratio　and　mass　density　by　the　Halpin–Tsai　model　and　the　rule　of　mixture　for　all　distributions,　respectively.　Then,　the　motion　equation　of　the　composite　piezoelectric　cantilever　beam　is　derived　using　Lagrange＇s　principle　by　von　Karman＇s　nonlinear　shear　deformation　theory.　In　order　to　achieve　vibration　reduction　effect,　the　active　vibration　control　is　applied　with　a　velocity　feedback　control　algorithm.　Initially,　the　computed　outcomes　are　cross-referenced　with　extant　literature　to　validate　the　accuracy　of　the　employed　solution　methodologies.　Subsequently,　an　in-depth　analysis　is　undertaken　to　elucidate　the　impacts　of　diOOerse　material　parameters　and　feedback　control　gains　on　the　active　vibration　control　efficacy　of　the　piezoelectric　beam　reinforced　with　Graphene　Platelets　within　a　porous　nanocomposite　framework.　©　The　Author(s),　under　exclusive　license　to　Springer　Nature　Singapore　Pte　Ltd.　2024.