Strong controller of interference observer based on optical disk drive focas servo-system


Application Number  00129540 Application Date  2000.09.28
Publication Number  1335595 Publication Date  2002.02.13
Priority Information   2000/7/31 KR 0044217/2000  
International
Classification
 G11B7/09;G11B21/02  
Applicant(s) Name  Daewoo Electronics Co., Ltd.  
Address    
Inventor(s) Name  Pae Hongmun  
Patent Agency Code  72002 Patent Agent  jian wei
AbstractTo provide a disk drive focusing servo controller capable of simultaneously and efficiently removing model uncertainty, system parameter fluctuation, or disturbance by adopting a disturbance observer, and mounting an external servo controller on an external loop. SOLUTION: This method for controlling a disk drive focusing servo to be used for a disk drive focus plant comprise a step for constructing a nominal design plant by adding a disturbance observer to be operated in the same way as the focus plant, a step for constructing a corrected design plant in the nominal design plant by a white noise into consideration, a step for forming a target filter loop fulfilling prescribed performance, stability and a robust condition based on the corrected design plant for acquiring a filter gain matrix, and a step for restoring the transmission function matrix of the target filter loop from the loop transmission function matrix of the corrected design plant for acquiring a control gain matrix.