The principle of piezoelectric modalsensor is introduced and formulas of calculating modal response by using measured piezoelectric outputs are given.
介绍了压电模态传感器的实现原理，并给出了由实测压电单元输出得到结构模态响应的计算公式。
2
The principle of piezoelectric modalsensor is introduced and the formulas for calculating modal responses according to measured piezoelectric outputs are gained.
介绍了压电模态传感器的实现原理，并给出了由实测压电单元输出得到结构模态响应的计算公式。
3
The genetic algorithms was adopted to optimize sensor placement and enhance completeness of the test data in the space grid structure modal test.