Hard disk audio vibration adaptive feedforward control method based on earphone jack signal extraction

A signal extraction, headphone jack technology, applied in adaptive control, general control system, control/regulation system, etc., can solve the problem of adaptive feedforward compensation performance limited sensor measurement bandwidth, etc., to improve hard disk performance, reduce System cost, the effect of reducing the cost of hard disk production

Inactive Publication Date: 2018-09-04
CAS HEFEI INST OF TECH INNOVATION
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Problems solved by technology

[0006] The purpose of the present invention is to solve the defect in the prior art that the adaptive feedforward compensation performance is limited by the sensor measurement bandwidth, and provide a hard disk audio vibration adaptive feedforward control method based on the headphone jack signal extraction to solve the above problems

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  • Hard disk audio vibration adaptive feedforward control method based on earphone jack signal extraction
  • Hard disk audio vibration adaptive feedforward control method based on earphone jack signal extraction
  • Hard disk audio vibration adaptive feedforward control method based on earphone jack signal extraction

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[0048] In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:

[0049] Such as figure 1 As shown, a kind of hard disk audio frequency vibration adaptive feed-forward control method based on the headphone jack signal extraction of the present invention replaces the existing sensor by extracting the speaker signal, thereby greatly avoiding sensor bandwidth, high system cost and Robustness related issues.

[0050] By using the audio vibration source (speaker) signal to convert the analog speaker signal into a digital signal, and then processing it using the SAFF scheme, the implementation of SAFF technology can compensate for the PES signal without affecting the bandwidth limitation of the sensor. In addition, system costs are reduced due to the reduced number of sensors. However, there are two fac...

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Abstract

The invention relates to a hard disk audio vibration adaptive feedforward control method based on earphone jack signal extraction. In the prior art, adaptive feedforward compensation performance is limited by a sensor measuring bandwidth. In the invention, the above defect is overcome. The method comprises the following steps of extracting and digitizing an audio signal; carrying out mechanical transmission function recognition; and calculating the feedforward compensation signal of position error control. In the invention, an adaptive feedforward method based on a loudspeaker is used to reduce system cost, and simultaneously, the bandwidth limitation of a hard disk driver servo system is avoided.

Description

technical field [0001] The invention relates to the technical field of hard disk drives, in particular to a hard disk audio vibration self-adaptive feedforward control method based on earphone jack signal extraction. Background technique [0002] As multimedia applications become more and more important in the daily use of notebook computers, the increased vibration caused by the speakers creates a challenge for hard disk drive (HDD) position control. Degraded hard drive throughput performance and slower response times due to speaker vibrations are detrimental to the customer experience. In order to improve the application effect of notebook computer hard disk drives, the hard disk drive industry is required to improve its audio vibration suppression performance. [0003] Currently in the HDD industry, the Sensor-Based Adaptive Feed-Forward (SAFF) disturbance compensation scheme has been researched and applied for many years, which utilizes sensors, such as accelerometers, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 王海雷李文波吴雪莲
Owner CAS HEFEI INST OF TECH INNOVATION
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