郭闯强, 倪风雷, 孙敬颋, 刘宏. 具有力矩传感器的柔性关节的振动抑制[J]. 机器人, 2011, 33(4): 449-454..
GUO Chuangqiang, NI Fenglei, SUN Jingting, LIU Hong. Vibration Suppression for the Flexible Joint with Torque Sensor. ROBOT, 2011, 33(4): 449-454..
Abstract：A spoke-type torque sensor mounted between the output of harmonic reducer and the link of robot is developed to control the vibration of flexible joint with harmonic reducer.The torque sensor is used to feed back the reaction torque exerted on the joint by the robot arm,and thereby obtain the vibration state information of the flexible joint directly.An approach to vibration suppression,which is capable of reducing the vibration quickly by means of adding a feed-forward compensation of nominal output torque to the conventional PD controller plus torque negative feedback,is proposed based on the feedback information from the designed torque sensor and the calculated nominal output torque of the joint.A series of vibration suppression experiments for tracking trapezoidal trajectories are carried out on an experimental platform newly designed for single joint control.The experimental results show that this approach can suppress the joint vibration quickly with a high degree of trajectory tracking precision.Hence,the difficulty that traditional PD controller plus torque negative feedback can't take into account both the effect of vibration suppression and the precision of trajectory tracking will be overcome by using the controller proposed.
[1] 戴金桥,王爱民,宋爱国.基于磁流变液的柔性机器人振动控制阻尼器[J].机器人,2010,32(3):358-362,368.Dai J Q,Wang A M,Song A G.A magneto-rheological fluid based damper for vibration control of flexible robot[J].Robot,2010,32(3):358-362,368.
[2] 吴立成,孙富春,孙增圻,等.柔性空间机器人振动抑制轨迹规划算法[J].机器人,2003,25(3):250-254.Wu L C,Sun F C,Sun Z Q,et al.Optimal trajectory planning of flexible space robot for vibration reducing[J].Robot,2003,25(3):250-254.
[3] Kaneko K,Kondo S,Ohnishi K.A motion control of flexible joint based on velocity estimation[C]//16th Annual Conference on Industrial Electronics Society.Piscataway,NJ,USA:IEEE,1990:279-284.
[4] Diken H.Frequency-response characteristics of a single-link flexible joint manipulator and possible trajectory tracking[J].Journal of Sound and Vibration,2000,233(2):179-194.
[5] Zhang G,Furusho J.Control of robot arms using joint torque sensors[J].IEEE Control Systems Magazine,1998,18(1):48-55.
[6] 孙敬.大型空间机械臂的建模与控制研究[D].哈尔滨:哈尔滨工业大学,2008.Sun J T.Study on modeling and control oflarge space marupulator[D].Harbin:Harbin Institute of Technology,2008.
[7] Spong M W.Modeling and control of elastic joint robots[J].Journal of Dynamic Systems,Measurement and Control,Transactions of the ASME,1987,109(4):310-319.
[8] Tomei P.A simple PD controller for robots with elasticjoints[J].IEEE Transactions on Automatic Control,1991,36(10):1208-1213.
