Inventor

DING MINGZHONG

SG43 patents

⚠️ This page may combine multiple inventors who share the name “DING MINGZHONG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DING MINGZHONG

SEAGATE TECHNOLOGY LLC

Repeatable run-out error compensation method for a disc drive

Method and apparatus for feedforward repeatable runout compensation in a selected frequency range

Method and apparatus for adaptive feedforward cancellation

Head polarity detection algorithm and apparatus

Real-time automatic loop-shaping for a disc drive servo control system

Method and apparatus for handling multiple resonance frequencies in disc drives using active damping

Data storage medium with optimized servo format

Random vibration and shock compensator using a disturbance observer

Dependent write fault threshold

Write fault threshold for a set of tracks

Sinusoidal feed-forward seek with adaptive acoustic level constraint

Automatic acoustic management system for a disc drive

Method for harmonic frequency identification in a disc drive

Optimally designed parsimonious repetitive learning compensator for hard disc drives having high track density

Vibration compensation based on identification of vibration frequency

AC unlatch using grey code detection with zone partitioning

Head-disc assembly with embedded product identification code

Direct current magnetoresistive jog offset compensation

Data protection based on system vibration modes

Discontinuous mode back EMF measurement

Phase-advanced filter for robust resonance cancellation

Disturbance compensation for dual-stage servo system using vibration sensor

Temperature compensation of seek profiles in data storage devices

Seek in a disc drive with nonlinear pivot friction

Prediction-based data reassignment

Determining a location based on a cyclic bit sequence containing consecutively-placed identical bit-groups

Direct current magnetoresistive jog offset compensation

Method of characterizing and screening voice coil motor pivot friction in a low velocity region

Servo gain adjustment based on bias force error

Adaptive voltage-mode controller for a voice coil motor

Electrical phase compensation in BEMF spindle motor control

AC MR-offset compensation

Resonance screen with varying frequency and controllable gain booster

Direct current magnetoresistive jog offset compensation

Dynamic configuration of seek recovery in a disk drive

Vibration compensation using disk locked clock error

Detection of z-axis non-operation shock

Detection of Z-axis non-operation shock

Idle power saving for actuator device

LIM KANG HAI

Determining microactuator failure in a multi-stage tracking system

WEI BO

Scanning reassigned data storage locations

DING MINGZHONG

Storage device maintenance in a portable device based on a power event

LIM JUIJING

Shock absorber capable of damping vibration