| 摘要: | 機械手臂因為具有多種優勢，目前已經被廣泛應用。首先，機械手臂能夠自動化重複性、精確度高的任務，提高生產效率和品質控制。其次，機械手臂在危險和有害環境中代替人類操作，提高工作安全性。此外，機械手臂持久的高生產力和品質一致的工作效率，使其適合處理需要大量重複性工作的高精度任務，可應用於不同行業和應用。傳統的機械手臂通常會將馬達安裝在旋轉軸上，導致機械手臂在設計時需要考慮馬達的形狀大小，以及機械手臂在做動時需要多負擔馬達的重量，導致扭矩增加。為了解決此問題，本論文設計了一個二軸的機械手臂，軸一透過齒輪進行驅動，軸二透過皮帶進行驅動，透過將馬達都安裝在底座上，可以有效降低手臂的扭矩。另外，機械手臂的連桿、旋轉軸、馬達座等機械手臂硬體皆自行設計加工，設計巧思上具有方便拆裝維修等優點。最後，機械手臂的跟蹤精度以及穩定性也是需要被解決的問題。我們設計了一個具有自適應律的滑模控制器，來對本論文所設計的機械手臂進行軌跡跟蹤控制，所提出的控制器與PID控制以及滑模控制進行跟蹤精度的比較，來證明此論文所提出的控制器具有較小的跟蹤誤差。此外，為了證明此論文所提出的控制器具有強健性，將所提出的控制器作用在被擾動影響的機械手臂上，在擾動影響下依然具有不錯的跟蹤精度，證明所提出之控制方法可以有效解決皮帶驅動與各種干擾等可能導致的擾動問題。;Robotic arms have been widely used because of their various advantages. First, robotic arms can automate repetitive, high-precision tasks, improving production efficiency and quality control. Secondly, the robotic arm replaces human operation in dangerous and harmful environments, improving working safety. In addition, the robotic arm’s long-lasting high productivity and consistent work efficiency make it suitable for handling high-precision tasks that require a lot of repetitive work, which can be applied to different industries and applications. Traditional robotic arms usually install the motor on the rotating shaft, which leads to the need to consider the shape and size of the motor when designing the robotic arm, and the need to bear the weight of the motor when the robotic arm moves, resulting in increased torque. In order to solve this problem, a dual-axis robotic arm is designed in this thesis. The first axis is driven by a gear, and the second axis is driven by a belt. By installing the motors on the base, the torque of the arm can be effectively reduced. In addition, the hardware of the robotic arm, such as the connecting rod, rotating shaft, and motor base, are all designed and processed by ourselves, which has the advantages of easy disassembly and maintenance. Finally, the tracking accuracy and stability of the robotic arm are also issues that need to be resolved. In this thesis, an advanced controller named adaptive sliding mode controller (ASMC) is designed to perform trajectory tracking control on the self-developed robotic arm, and the tracking accuracy is compared with PID control and ordinary sliding mode control (SMC) to prove the control proposed in this thesis device has a small tracking error. In addition, in order to show that the proposed controller is robust, we used it on the external disturbance that affected the robotic arm and proved its use has small tracking accuracy under the condition of external disturbance. Moreover, it also can effectively solve the perturbation problem from the belt drive and other possible disturbances. |
