PATENT CLAIM ANALYSIS

Application Number: 15900906
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-11
Patent Classification: ["360", "055000"]

Abstract:
According to an embodiment, a magnetic disk, a magnetic head, an actuator and a processing unit are provided. The processing unit acquires a feature amount from a position error between a demodulated position and an estimated position of the magnetic head based on a frequency resonance characteristic of the actuator or a frequency characteristic of vibration caused by disturbance of the actuator and, based on the feature amount, sets an on-track determination number used for confirming an on-track state of the magnetic head after seeking.

Claim (Index 12):
A magnetic disk device, comprising:\n a magnetic disk; a magnetic head that accesses the magnetic disk; an actuator that causes the magnetic head to seek on the magnetic disk; a processing unit that acquires a feature amount from a position error between a demodulated position and an estimated position of the magnetic head based on a frequency resonance characteristic of the actuator or a frequency characteristic of vibration caused by disturbance of the actuator and, based on the feature amount, sets an on-track determination number used for confirming an on-track state of the magnetic head after seeking; a voice coil provided at an end portion of the actuator; a state observer that calculates an estimated position of the magnetic head based on the demodulated position of the magnetic head and a target value of a VCM current flowing through the voice coil; a state feedback control unit that sets the target value of the VCM current based on the position error and outputs the target value of the VCM current to the state observer; a filter that has a pass band of a frequency component of the position error, the pass band being set based on the frequency resonance characteristic of the actuator or the frequency characteristic of vibration caused by disturbance of the actuator, receives the position error as an input, and outputs the feature amount; an integrator that is connected to a subsequent stage of the filter and predicts an evaluation value by integrating the feature amount of each sample point; and an on-track determination number setting unit that is connected to a subsequent stage of the integrator and sets the on-track determination number based on the evaluation value.

Metadata:
- Claim Count in Document: 36.0
- Percentile: 88.0
- Lexical Diversity: 1.91667
- Patent Class: 360.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10462803', '12329404', '15667933', '11045496', '11486307']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.691900346050088
- 35 USC 102 Novelty (BERT): 0.4594387981085835
- Combined Prediction Score: 0.6686541912559375
- Mean Citation Score: 153.324686
- Max Citation Score: 159.29742
- Similarity Product: 132.30237620069502

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test