JiunHan Chen
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    # 論文勘誤 p27 而三個服務機器人在分別接到任務之後, 服務機器人系統(PPO 演算法架 構),經由演算,會演算出服務機器人該走的下一步的機率,三個服務機器人各 依最高的機率去執行,除非有違法行為,才會依均勻分佈選擇去執行該走的下 一步。 -> 訓練的時候會用softmax輸出的機率分佈去進行動作的取樣,測試的時候才會選擇最高機率 --- p28 若非上述情況: rt= - (機器人目前位置與目標位置的距離) 這個reward已經移除 --- p37 ![](https://i.imgur.com/AJOD7bJ.png) https://chriskang028.medium.com/statistic-hypothesis-testing-f766c129d632 --- 問題: 模型問題 Q:是否有嘗試過其它的模型,更深的模型深度? 是有試過更深或更寬的模型,但訓練時間會拉更長,所以以這個問題的複雜度,我們折衷以目前的模型來做,就足夠解決我們預設的問題。而且我們是要做出強化學習的訓練框架,足以解決路徑規劃與中央程排系統的需求,不是要求最好。 算法問題 Q:為什麼使用PPO?而不是其他的強化學習算法? 以這個個案需求,使用目前最強的強化學習演算法PPO。 Q:定義違法行為有巨大的效能提昇,這個部份是採用例外處理的方式,為什麼不用RL的方法解決? 二者都可以用RL解決,只要訓練的夠久,就沒有問題。但是在工程上,使用例外處理就可以解決。(加了人腦的好處) 禁止迴圈: 禁止碰撞:類似緊急措施 Q:本論文牽涉到地圖與機器人定位問題,是否有考慮過將RL與SLAM進行整合? SLAM:感測器收集資料來建地圖,來解決機器人定位問題。 但我們論文解決的問題是整合 中央排程與路徑規劃的問題。以及多個機器人同時協力使用。 目前是 A* +SLAM 比較多。 參數問題 Q:為什麼訓練時epoch 6000後出現了明顯的效能下降? 因為學習參數learning rate我們在2000,6000會各下降1/10, 所以6000之後出現over fitting的現象(調整太夠精細,反而在各種情況表現就下降了) 模擬環境問題 Q:來客速率是每30T來一組客人,是否不夠真實? 因為我們要做二組的類比,若以常態分布隨機來做,實驗會難以進行。所以會做這樣的設定。 實驗問題 Q:為何是與A\*進行比較?為什麼不讓非RL的方法也更新地圖的全局資訊? 在實際應用的時候,很難藉由感測器來獲得全局資訊,所以會發生無法使用A STAR系統的機器人。 Q:中央排程使用RL,為什麼能比FIFO還好?具體的差異是在哪? 應用問題 Q:這樣的一個訓練框架如何應用到真實的餐廳場景? * 更真實的3D模擬環境:先以訓練框架可行 * 與SLAM進行整合 * 減少reality gap的問題

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