Lu, Chung-JenChung-JenLuWang, Ming-ChengMing-ChengWangHuang, Shih-HsuanShih-HsuanHuang2008-11-042018-06-282008-11-042018-06-282008http://ntur.lib.ntu.edu.tw//handle/246246/85797application/pdf1184858 bytesapplication/pdfen-USAnalytical study of the stability of a two-ball automatic balancerjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/85797/1/03.pdf