主動式減振可以有效抑制振動的問題，可惜成本較高。被動式減振器雖然受制於其減振效果，但由於製造簡易且成本低廉，因此已廣為被業界採用。針對被動式減振器之有限減振效果，吾人將提出一種新式的自調被動減振器設計，不僅在成本上優於主動式減振，在減振的效果也有相當良好的成果。吾人所設計的減振器系統，並不會隨著被減振對象的不同而更改其設計架構，該減振器會自行在架構上尋找最佳的減振位置來達到平衡減振的效果。本研究將此模型實體化，藉由實驗驗證理論的正確性。本實驗模型係於被減振對象的架構下方設置一滑軌，此滑軌的擺設方向係依先前理論預估之位置設計而得。吾人將於此滑軌下方懸吊一螺旋彈簧，而該螺旋彈簧下方則聯結一橫向桿件，此桿件可藉以驅動螺旋彈簧上下及旋轉，以抑制主體之振動。而隨著主體之振動，此螺旋彈簧減振器將沿著滑軌移動，直至達到系統之最小振動為止，如此將自動調整位置而達到最佳的減振效果。這些設計除了具備理論的基礎，也將極具實用價值，相信對於目前的減振方法有極佳的提升。 This study proposes an economical and effective method of reducing vibration in a rigid-plate mechanism. The vibrating mechanism comprises a rigid body plate joined by a spring at each of the four corners. Three kinds of slots (longitudinal, cross and diagonal slots), were embedded under the plate. We attached a 2-DOF (rotation and transverse) Tuned-Mass-Damper (TMD) to the slot at the bottom of the rigid plate. This“self-adjust-position”hybrid dynamic balancer TMD is allowed to move along the slot and is capable of balancing and diminishing the vibration of the plate. Lagrange’s equation was used to derive the motion of the rigid plates. Vibration reduction effect was studied analytically and numerically following attachment of the TMD at different fixed positions in the system. We implemented a practical model with different kinds of slot under the plate to measure the amplitude of vibration with the dynamic balancer TMD, and conducted a comparison between the theoretical and empirical results. The experimental results demonstrate that the optimal vibration reduction effect was achieved when the TMD was attached initially at a position far from the applied force point. The results also show that the diagonal slot reveals the most effective in reducing the amplitude of vibrations of the plates, when the force was applied on the end of the diagonal slot. The frequency response graph shows that theoretical estimates correspond to experimental results.
