acceleration transducer加速度傳感器acceptance testing驗收測試accessibility可及性accumulated error累積誤差AC-DC-AC frequency converter交-直-交變頻器AC (alternating current) electric drive交流電子傳動active attitude stabilization主動姿態穩定actuator驅動器，執行機構adaline線性適應元adaptation layer適應層adaptive telemeter system適應遙測系統adjoint operator伴隨算子admissible error容許誤差aggregation matrix集結矩陣AHP (analytic hierarchy process)層次分析法amplifying element放大環節analog-digital conversion模數轉換annunciator信號器antenna pointing control天線指向控制anti-integral windup抗積分飽卷aperiodic decomposition非周期分解a posteriori estimate后驗估計approximate reasoning近似推理a priori estimate先驗估計articulated robot關節型機器人assignment problem配置問題，分配問題associative memory model聯想記憶模型associatron聯想機asymptotic stability漸進穩定性 attained pose drift實際位姿漂移attitude acquisition姿態捕獲AOCS (attritude and orbit control system)姿態軌道控制系統attitude angular velocity姿態角速度attitude disturbance姿態擾動attitude maneuver姿態機動attractor吸引子augment ability可擴充性augmented system增廣系統automatic manual station自動-手動操作器automaton自動機