## 1pEA1. Electrical equivalent circuit of a thick Langevin-type flexural transducer.

### Session: Monday Afternoon, December 2

### Time: 2:00

**Author: Takeshi Tamura**

**Location: Precision and Intelligence Lab., Tokyo Inst. of Technol., 4259 Nagatuta, Midori-ku Yokohama, 226 Japan**

**Author: Yoshikazu Koike**

**Location: Precision and Intelligence Lab., Tokyo Inst. of Technol., 4259 Nagatuta, Midori-ku Yokohama, 226 Japan**

**Author: Sadayuki Ueha**

**Location: Precision and Intelligence Lab., Tokyo Inst. of Technol., 4259 Nagatuta, Midori-ku Yokohama, 226 Japan**

**Abstract:**

Since there are two vibration components at a mechanical output terminal of
a thick flexural transducer, that is, lateral and rotational components,
corresponding electrical ports have to be provided in the electrical equivalent
circuit. A load applied to the transducer also has to be considered separately
corresponding to each vibration component. To treat this situation with the
electrical equivalent circuit, an analytical solution, namely, Timoshenko's beam
theory given by Miklowitz and the piezoelectric equation, is applied to
calculate the free vibration mode and the electrical equivalent components of
the transducer. Using this derived equivalent circuit, the behavior of the
loaded flexural transducer is experimentally studied to prove the validity of
the proposed circuit. This is the first trial to derive such an equivalent
circuit that can treat two vibration components simultaneously.

ASA 132nd meeting - Hawaii, December 1996