%0 Journal Article %T Mechatronics design of stiffness enhancement for direct‐drive motor system using ER variable damper %A Su, Y. X. %A Duan, B. Y. %A Zheng, C. H. %J Journal of Field Robotics %V 19 %N 9 %P 419-425 %@ 1556-4959 %D 2002-09-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve