state observer的用法和樣例：
例句
- A reduced-order state observer and a control law based on the observer are designed.
建立了相應的數學模型，並在此模型的基礎上，設計了降維狀態觀測器和基於觀測器的反饋控制律。 - Additionally, a state-space observer was designed to estimate the sideslip angle, which was difficult to measure directly.
由於質心側偏角信號難以直接測量，設計了狀態觀測器對該信號進行估計。
