发明名称 |
MECHANICAL OSCILLATOR WITH ELECTRONIC FEED-BACK INCLUDING NON-LINEAR CONTROL |
摘要 |
A mechanical oscillator arrangement includes a mechanical structure (30) having at least one transmission path through it, and at least one mode. A controller (40) is provided with an amplifier (70) and a feedback network (80, 90) which together provide a positive feedback oscillator for exciting a mode of the mechanical structure (30). The feedback network (80, 90) comprises a non linear amplitude control element (N-LACE) (90), a frequency dependent gain element with an electronic transfer function, and a phase compensator (80). The mechanical oscillator arrangement also includes an actuator (606) which excites the mechanical structure (30) based upon an output from the controller (40), and a sensor (60a) which senses vibrations in the mechanical structure (30) and then outputs a signal to the controller (40) based upon the sensed vibrations. Such a stabilized positive feedback arrangement is self exciting at the effective resonance frequency of the mechanical structure and avoids the need for an external fixed or variable frequency driver. |
申请公布号 |
EP2380279(A2) |
申请公布日期 |
2011.10.26 |
申请号 |
EP20100700890 |
申请日期 |
2010.01.18 |
申请人 |
ISIS INNOVATION LIMITED |
发明人 |
GREGG, JOHN, FRANCIS;KARENOWSKA, ALEXY, DAVISON |
分类号 |
H03K17/95;G01N3/38;H03B5/12 |
主分类号 |
H03K17/95 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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