Research

SELECTED PUBLICATIONS

1) H. Ho, "Disturbance Rejection Controller Design Based on Sensitivity Function Notching," in Emirates Association of Computer, Electrical & Electronics Engineers (EACEEE) Conference, Singapore, July 2015.

2)     H. Ho and F. Misoc, “Audio Signal Processing Studio Remote Lab for Signals and Systems Class," 2015 ASEE Southeast conference, FL, April 2015.

3)     H. Ho and S. Tippens, “New Product Development for Engineers," in International Institute of Engineers Conference, Malaysia, 2014.

4)    D. Tigner, F. Misoc, H. Ho, "MATLAB-Simulink Optimization of Internal Combustion Engine Choice for Hybrid Vehicles", 9th International Conference on Industrial Power  Engineering, Proceedings, Bacau, Romania, 2014.

5)     P. M. Young, J. C. Morris, and H. T. Ho, “Synthesis Control with PI Augmentation," in American Control Conference, pp. 1297-1302, 2006.

6)     P. Young, J. Morris, and H. T. Ho, “Servo Control of a Dual-Stage Actuator for a High Performance Disk Drive. Part 1: Modeling and Simulation," in American Control Conference, pp. 2523-2528, 2003.

7)     P. Young, J. Morris, and H. T. Ho, “Servo Control of a Dual-Stage Actuator for a High Performance Disk Drive. Part 2: Controller Design and Implementation," in American Control Conference, pp. 2529-2534, 2003.

8)     H. T. Ho et al., “Seagate Quarterly Technology Roadmap,” Seagate Technology Confidential, 2000-2005.

9)     J. K. Chang and H. T. Ho, “LQG/LTR Frequency Loop Shaping to Improve TMR Budget,“ in IEEE Transactions on Magnetics, Volume 35, Issue 5, Sept 1999 Page(s):2280–2282.

10)     H. T. Ho and T. Doan, “Design and Analyses of HDD Servo System Using Power Spectrum Data ,“ in Advances in Information Storage Systems Series, Vol.8, World Scientific Publishing Co., 1998, Page(s):147 – 150.

11)     H. T. Ho and T. Doan, “Distortion Effects on Servo Position Error Transfer Function,“ in IEEE Transactions on Magnetics, Volume 33, Issue 4, Jul 1997 Page(s):2569–2572.

12)     J. K. Chang, S. Weerasooriya, and H. T. Ho , “Improved TMR Budget Through a Frequency Shaped Servo Design,” in Industrial Electronics, Control and Instrumentation Conference (IECON) , 1997, Volume: 1, On page(s): 47-51 vol.1

13)     H. T. Ho, “Fast Servo Bang-Bang Seek Control,“ in IEEE Transactions on Magnetics, Volume 33, Issue 6, Nov 1997 Page(s):4522 - 4527

14)   H. T. Ho, “Noise Impact on Servo TMR,” in American Control Conference, pp. 2906-2909, June 1997.

15)   H. T. Ho, “On Design Issues of Servo System for Hard Disk Drives,” in International Industrial Electronics, Control and Instrumentation Conference (IECON), Volume: 1, On page(s): 58-61 vol.1, Nov 1997.

16)   H. T. Ho et al., “Maxtor Quarterly Enabling Technology Summit,” Maxtor Corp. Confidential, 1995-1998.

17)   H. T. Ho, “Parametric Modeling and Control of Robot Manipulator Using Decomposed Connectionist Networks,” Ph.D. thesis, University of Colorado at Boulder, 1994.

18)   H. T. Ho, “Adaptive Inverse Dynamics Estimation of Robotic Manipulator With Varying Payload Using Neural Networks,” in International Fuzzy Systems and Intelligent Control Conference, Louisville, KY, 1993.

19)   H. T. Ho, “Generalized Adaptive Equalization,” Masters thesis, University of Colorado at Denver, 19889.

 

PATENT LIST – HAI T. HO

UNITED STATES PATENT AND TRADEMARK OFFICE 

1)      H. T. Ho, et al., “Reducing actuator arm oscillation during settle mode in a disc drive servo system,” U.S. patent # 6,937,428, 2005.

2)      H. T. Ho, et al., “Digital sine/cosine wave generator,” U.S. patent # 6,892,213, 2005.

3)      H. T. Ho, et al., “Efficient feedforward compensation for repeatable runout in a disc drive,” U.S. patent # 6,867,943, 2005.

4)      H. T. Ho, et al., “Repeated runout position error compensation in a disc drive servo system,” U.S. patent # 6,819,521, 2004.

5)      H. T. Ho, et al., “Method and apparatus for electronically shifting mechanical resonance of an actuator system of a disc drive,” U.S. patent # 6,674,601, 2004.

6)      H. T. Ho, et al., “Disc drive dynamics identification using synchronous excitation signal,” U.S. patent # 6,654,197, 2003.

7)      H. T. Ho, et al., “Disc drive resonance disturbance cancellation filter,” U.S. patent # 6,636,376, 2003.

8)      H. T. Ho, et al., “Method and apparatus for feed-forward cancellation using a phase lock loop,” U.S. patent # 6,628,472, 2003.

9)  H. T. Ho, et al., “Method and apparatus for feed-forward cancellation using a peak detector,” U.S. patent # 6,618,219, 2003.

10)  H. T. Ho, et al., “Dual stage positioning system using a shared voltage source,” U.S. patent # 6,541,931, 2003.

11)  H. T. Ho, et al., “Disk drive with compensation values calculated using a non-causal impulse response,” U.S. patent # 6,292,324, 2001.

12)  H. T. Ho, et al., “Efficient drive-level estimation of written-in servo position error” U.S. patent # 6,115,203, 2000.

13)  H. T. Ho, et al., “Disk drive with multiple disk surfaces having improved allocation of servo sectors,” U.S. patent # 6,018,430, 2000.

14)  H. T. Ho, et al., “Servo sector allocation for high sampling rate,” U.S. patent # 5,936,790, 1999.

15)  H. T. Ho, et al., “cartridge library system architecture,” U.S. patent # 5,682,276, 1997.

16)  H. T. Ho, et al., “Retaining slot for data cartridge library system,” U.S. patent # 5,621,586, 1997.

17)  H. T. Ho, et al., “Data cartridge library system architecture,” U.S. patent # 5,555,143, 1996. 

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