Optimization of PZT position on dual stage actuators to reduce PZT cracking | |
| Author | Witsanu Srikaow |
| Call Number | AIT Thesis no.ISE-12-68 |
| Subject(s) | Actuators Hard disks (Computer science) |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science in Mechatronics, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ISE-12-68 |
| Abstract | Since a hard disk drive is needed to gain more areal density to achieve customer requirement, many technologies are developed and used for hard disk drives. Dual stage actuator (DSA) has been deployed on high - end hard disk for precision sliding stage and servo control. It is capable for the small bit pattern media due to the second stage actuator has been combined to Head Gimbal Assembly (HGA) to improve the accuracy of read/write element seeking on track. PZT material which is installed on the dual stage actuator to be the second stage actuator is a ceramic that easy to be damaged during process of assembly. It is hard material but also fragile as same as another ceramic material. So a process installing PZT element on HGA is able to be a cause of crack the PZT element. Thus a head assembly is degradation. This study is considered on position of PZT element which is attached on HGA. Finite Element Analysis (FEA) is used to analyze the effect o f position of PZT during swaging process. Then Response Surface Methodology (RSM) which is a statistic technic is used to predict the maximum stress that occurs on PZT element. Then this study is optimizing the position of PZT installation on suspension to reduce the affection during assembly process. The result of study perform that maximum stress that occur on PZE element is vary while the position of PZT element of HGA is changed. By using RSM technic, the optimum position of PZT element on HGA is able to reduce the maximum stress on PZT element 20%. |
| Year | 2012 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ISE-12-68 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Afzulpurkar, Nitin V. |
| Examination Committee(s) | Mongkol Ekpanyapong;Thanoo Thongthai |
| Scholarship Donor(s) | Western Digital (Thailand) Co., Ltd;NECTEC;Asian Institute of Technology Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2012 |