The present invention provides an active vibration-absorbing support rod with the ability to maintain spatial accuracy, which realizes
vibration isolation based on the principle of force offset. While isolating vibration, it will not affect the initial position and angle accuracy of the
moving parts, thereby maintaining the spatial (position and angle) accuracy of the
moving parts. The active vibration-absorbing support rod includes: a flexible hinge A, a flexible hinge B, a vibration-absorbing
actuator housing, a vibration-absorbing
actuator base, a vibration-absorbing
actuator and a
force sensor; the flexible hinge A and the flexible hinge B provide low
bending stiffness in two directions perpendicular to the axial direction, so that the active vibration-absorbing support rod is equivalent to a two-force rod in
mechanics; the
force sensor measures at least the
axial force information, and the vibration-absorbing actuator provides an axial actuating force under the drive of an external controller. The
force sensor, the vibration-absorbing actuator and the controller form a closed-
loop control system for the
axial force. In addition, the present invention also provides a vibration reduction
system based on the above-mentioned active vibration-absorbing support rod.