TOPIC Suppression of Vibration Caused By Resident Unbalance of Rotor for Magnetically Suspended Flywheel
SPEAKER TANG Jiqiang

School of Instrument Science and Opto-Electronics, Beihang University
DATE 31 January 2012 (Thursday)
TIME 4:00pm-5.00pm
VENUE Level 2, Social Robotics Lab, I3 Building,

Interactive Digital Media Institute, 21 Heng Mui Keng Terrace, NUS.
FEES No Charge
ABSTRACT
For magnetically suspended flywheel (MSFW), the resident unbalance of rotor can cause synchronous vibration and reduce the attitude control precision of spacecrafts. To eliminate the vibration caused by the resident unbalance of rotor suspended by magnetic bearing, the theorem of unbalance vibration is researched, and point out that the vibration can be successfully suppressed through the elimination of synchronous component in magnetic suspension forces by magnetic suspension force compensation method. Based on the general notch filter, this method is proposed to be closed-loop style when rotor rotates beyond its critical stable speed and to be open-loop style when the speed of rotor is less than the critical stable speed by additional displacement stiffness compensation segment, open and closed-loop control method. The stability of this method is analysized and the ability to eliminate n octave synchronous is verified during the whole speed range of rotor. Experimental results demonstrate that this method can suppress the unbalance vibration significantly during the operation speeds of MSFW and is suitable for MSFW in that the rotor traverses its critical stable speed frequently.
BIOGRAPHY
Dr. TANG Jiqiang was born in March 1977. He obtained the doctor’s degree of Precision Instrument and mechanism in Harbin Engineering University in 2005. His major research interest is on novel inertial actuators such as magnetically suspended flywheel and magnetically suspended control momentum gyroscope, high-Tc Superconducting magnetic suspension technology and its application. He is the Principle Investigator of research projects supported by the National Natural Science Foundation of China (Jan., 2012-Dec., 2015), ‘WEISHI’ Foundation of Beihang University (Jan., 2011-Dec., 2011), Postdoctor Foundation of China (Jan., 2007-Dec., 2008) and Foundation of The sub-subject item of the National Basic Research Program (973 Program) of China (Jan., 2009-Dec., 2011).

He has published about 10 journal and conference papers, and 3 patents.
REMARKS
 Jointly Organized By Edutainment Robotics Lab, ECE, Social Robotics Lab, IDMI, and Singapore IEEE SMC/R&A and Control Chapters