radio frequency sensor射頻敏感器ramp function斜坡函數random disturbance隨機擾動random process隨機過程rate integrating gyro速率積分陀螺ratio station比值操作器reachability可達性reaction wheel control反作用輪控制realizability可實現性,能實現性real time telemetry實時遙測receptive field感受野rectangular robot直角坐標型機器人rectifier整流器recursive estimation遞推估計reduced order observer降階觀測器redundant information冗余信息reentry control再入控制regenerative braking回饋制動，再生制動regional planning model區域規劃模型regulating device調節裝載regulation調節relational algebra關系代數relay characteristic繼電器特性remote manipulator遙控操作器remote regulating遙調 remote set point adjuster遠程設定點調整器 rendezvous and docking交會和對接reproducibility再現性resistance thermometer sensor熱電阻

　　resolution principle歸結原理resource allocation資源分配response curve響應曲線return difference matrix回差矩陣return ratio matrix回比矩陣reverberation回響reversible electric drive可逆電氣傳動revolute robot關節型機器人revolution speed transducer轉速傳感器rewriting rule重寫規則rigid spacecraft dynamics剛性航天動力學risk decision風險分析robotics機器人學robot programming language機器人編程語言robust control魯棒控制robustness魯棒性roll gap measuring instrument輥縫測量儀root locus根軌跡roots flowmeter腰輪流量計rotameter浮子流量計，轉子流量計rotary eccentric plug valve偏心旋轉閥rotary motion valve角行程閥rotating transformer旋轉變壓器Routh approximation method勞思近似判據routing problem路徑問題