公开(公告)号：US20170041552A1

公开(公告)日：2017-02-09

申请号：US14821395

申请日：2015-08-07

Applicant: ANALOG DEVICES GLOBAL

Inventor： Javier CALPE MARAVILLA ,  Eoin E. ENGLISH ,  Rafael MAHIQUES ,  Jose Carlos CANADA ,  Maria Jose MARTINEZ

IPC: H04N5/232

Abstract: Actuators are used to move a variety of objects to desired positions. It is generally desirable that they can do this quickly without exhibiting overshoot or ringing. Some actuators are required to respond very quickly and examples of these are voice coil drivers used to move lenses in autofocus cameras provided in everyday devices such as smart phones and tablets. A rapid two step controller scheme had already been disclosed by Analog Devices Inc. Whilst the scheme works well, it can only be used reliably if the resonant frequency of the actuator is known to within 2 or 3%. The inventors have discovered that the resonant frequency of an actuator unexpectedly changes as a function of position. This disclosure provides ways of modifying the control scheme to cope with changes in resonant frequency.

Abstract translation: 致动器用于将各种物体移动到所需位置。 通常希望它们可以快速地进行，而不会出现过冲或振铃。 一些执行器需要很快的响应，其中的例子是用于在诸如智能手机和平板电脑的日常设备中提供的自动对焦相机中移动透镜的音圈驱动器。 ADI公司已经公布了一个快速的两步控制器方案。虽然该方案工作正常，但是如果致动器的谐振频率已知为2％或3％，则只能可靠地使用该方案。 发明人已经发现，致动器的谐振频率意外地作为位置的函数而改变。 本公开提供了修改控制方案以应对谐振频率变化的方式。