发明名称 |
NUTATION DAMPER SYSTEM COMPRISING A CONTROL MEMBER FOR VARYING A NATURAL FREQUENCY OF A PENDULUM |
摘要 |
In a nutation damper system which includes a pendulum (30, 33, 34, 38) swingable at a natural frequency and a block element (35) which cooperates with the pendulum to damp nutations having a nutation frequency, a control member (40) electromagnetically coupled to the pendulum is provided for varying the natural frequency to a forced frequency substantially equal to the nutation frequency. The control member comprises an electromagnetic coil energized by a control signal having electric current produced by a control signal circuit which is proportional to a square of the nutation frequency. The block element may comprise either a permanent magnet or an electromagnet when a pendulum weight of the pendulum is of an electrical conductor. The electromagnet may intermittently be energized by a power source circuit. Alternatively, the block element may be of an electrical conductor when the pendulum weight is of a permanent magnet. |
申请公布号 |
DE3376152(D1) |
申请公布日期 |
1988.05.05 |
申请号 |
DE19833376152 |
申请日期 |
1983.04.11 |
申请人 |
NEC CORPORATION |
发明人 |
TAKEZAWA, SUSUMU;IKEBE, KEN'ICHI;AYADA, HARUKI;FUKUI, TATSUYUKI;OKADA, MUNENORI |
分类号 |
B64G1/38;B64G1/24;B64G1/28;B64G1/32;G05D1/08;(IPC1-7):G05D1/08 |
主分类号 |
B64G1/38 |
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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