Practical Approach for Controlling Optical Image Stabilization System

Kim, Woo-Yong; Seo, Hyung-Tae; Kim, Soohyun; Kim, Kyung-Soo

doi:10.1007/s12555-018-0913-0

Cited by 13 publications

(10 citation statements)

References 12 publications

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“…Viewpoint stabilization: Another auto-adaptation compensates camera slight motions during the exposure time such as hand shake leading to blurry images. The Optical Image Stabilisation (OIS) (Kim et al 2019) automatically shifts the image sensor or the optics to compensate these movements. The optical shifting is more popular, since it can be easily performed by a single lens movement.…”

Section: Adaptive Optics: Moving Lensesmentioning

confidence: 99%

A Survey on Adaptive Cameras

Ducrocq,

Caron

2024

Int J Comput Vis

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Adaptive Optics: Moving Lensesmentioning

confidence: 99%

A Survey on Adaptive Cameras

Ducrocq,

Caron

2024

Int J Comput Vis

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“…A lag-lead compensator has been applied to control a lot of physical systems, such as an optical image stabilization system [17], a head-positioning control system in a disk drive [18], and a power system [19]. Compared with the PID controller, the lag-lead compensator can provide high-frequency attenuation, thus reducing sensitivity to high-frequency measurement noise and unmodeled dynamics.…”

Section: Introductionmentioning

confidence: 99%

Practical Automatic Tuning of Lag-lead Compensators for Feedback Control Systems

Tsai

Lai

2023

Period. Polytech. Elec. Eng. Comp. Sci.

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This paper proposes a scheme for auto-tuning a lag-lead compensator to satisfy frequency-domain specifications of a feedback control system. Most previous studies proposed algorithms for tuning either lag or lead compensators. A study presented a self-tuning lag-lead compensator whose proportional gain, however, needs to be set manually. In contrast to previous studies, a fully automated tuning process for a lag-lead compensator is devised in this paper. In the proposed scheme, the plant's frequency responses at specific frequencies are first estimated, and an iterative algorithm adapts all controller parameters. To facilitate the estimation of high loop gain at a low frequency, a notch filter is introduced to the control loop while estimating this high low-frequency loop gain. Without this mechanism, a real-time data acquisition system of a wide dynamic range would be required. In addition to fulfilling the requirements for the low-frequency loop gain and phase margin, another feature of the proposed scheme is the satisfaction of the required gain-crossover frequency. However, the proposed method supposes that the frequency-domain specifications can be met for a plant using a lag-lead compensator, which is the plant's requirement for the proposed method. Experimental results for controlling a voice-coil motor are reported in this paper, showing that the proposed auto-tuner can practically provide a lag-lead compensated system satisfying frequency-domain performance requirements.

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“…In some precision positioning tasks, the actuator needs to achieve sub-nanometer resolution and a stroke of hundreds of microns to drive operational objects [4][5][6]. For example, in optical image stabilization, the position error of the lens is caused by external random vibration, and the clear imaging is realized by compensating the displacement error by the actuator [7,8]. As a key component of the micro-nano positioning system, the displacement output characteristics of the actuator have a great influence on the quality of precision positioning [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Bidirectional Drive with Inhibited Hysteresis for Piezoelectric Actuators

Huang

Lian

et al. 2022

Sensors

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Piezoelectric actuators with a flexible displacement amplification structure are widely used in the fields of precision driving and positioning. The displacement curve of conventional piezoelectric actuators is asymmetrical and non-linear, which leads to large non-linear errors and reduced positioning accuracy of these piezoelectric actuators. In this paper, a bidirectional active drive piezoelectric actuator is proposed, which suppresses the hysteresis phenomenon to a certain extent and reduces the non-linear error. Based on the deformation theory of the beam, a theoretical model of the rhombus mechanism was established, and the key parameters affecting the drive performance were analyzed. Then, the static and dynamic characteristics of series piezoelectric actuators were analyzed by the finite element method. A prototype was manufactured and the output performance was tested. The results show that the actuator can achieve a bidirectional symmetric output of amplification displacement, with a maximum value of 91.45 μm and a resolution of 35 nm. In addition, compared with the hysteresis loop of the piezoelectric stack, the nonlinear error is reduced by 62.94%.

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Practical Approach for Controlling Optical Image Stabilization System

Cited by 13 publications

References 12 publications

A Survey on Adaptive Cameras

A Survey on Adaptive Cameras

Practical Automatic Tuning of Lag-lead Compensators for Feedback Control Systems

Bidirectional Drive with Inhibited Hysteresis for Piezoelectric Actuators

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