%0 Journal Article %T Model Construction and Performance Degradation Characteristics of a Deflector Jet Pressure Servo Valve under the Condition of Oil Contamination %A Chu, Yuanbo %A Yuan, Zhaohui %A He, Xuegong %A Dong, Zhichao %J International Journal of Aerospace Engineering %V 2021 %@ 1687-5966 %D 2021-02-27 %I Hindawi %~ DeepDyve