|
A Design of H Controller for Minimizing Position Error Signal in HGA Tester |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Tanachai Jatturongkapolkul 2. Benjamas Panomruttanarug |
| Title | A Design of H Controller for Minimizing Position Error Signal in HGA Tester |
| Publisher | King Mongkut's Univesity of Technology Thonburi |
| Publication Year | 2556 |
| Journal Title | วารสารวิจัยและพัฒนา มจธ. |
| Journal Vol. | 36 |
| Journal No. | 1 |
| Page no. | 85-97 |
| Keyword | Head Gimbal Assembly, HGA Tester, Position Error Signal, Servo System |
| ISSN | 0125-278X |
| Abstract | In hard disk drive industry, head gimbal assemblies (HGAs) may be individually tested prior to their installation in a diskdrive. While performing a test by a HGA tester, false negative result may result because of external air turbulence caused bythe rotation of the test disk, which may lead to oscillation of the HGA, causing it to move out of track; this error is calledPES (Position Error Signal). The objective of this study is to find a model of a servo system in HGA testing system byusing Transfer Function Determination Code (TFDC) algorithm with Particle Swarm Optimization (PSO) algorithm. TFDCtechnique is proposed to model the system in frequency domain and PSO is used to adjust the weights in the TFDCalgorithm at each frequency. Several kinds of inertia weights for PSO are compared to get the different models. Aftergetting the model, controllers are designed to get rid of the effect of disturbance by using PID Control and H? Control.Keywords : Head Gimbal Assembly; HGA Tester; Position Error Signal; Servo System |
