Advances in Piezoelectric Transducers Part 5 potx

... were introduced as: Advances in Piezoelectric Transducers 46 where W is a main matrix determinant and W A is a determinant of the matrix formed by replacing the first column in the main matrix ... Advances in Piezoelectric Transducers 50 System with piezoelectric damper System with piezoelectric actuator Fig. 16. Influence of piezoelect...

Ngày tải lên: 12/08/2014, 04:22

... process of representing information in a more compact form by eliminating redundancies in the original data representation (Pu, 2006). Due to the presence of redundancies in the original representation, ... antenna in order to satisfy the required EIRP from the point of view of the decrease in an in uence of atmospheric turbulence on BER in the uplink. 3.3.2 Downlink For the do...

Ngày tải lên: 19/06/2014, 19:20

...  sin , p C P U Ut t CZ     (36) Advances in Piezoelectric Transducers 38 Fig. 8. Arrangement of forces and bending moments acting on the cut out part of the beam and the piezoelectric ... perfectly bonded piezoelectric transducer - strain of the transducer is exactly the same as the beam’s surface strain. Taking into account arrangement of forces and bending mo...

Ngày tải lên: 12/08/2014, 04:22

... according to the following conditions: case 5, 2 0U  : 5, 5 1 5, 2 U k U  , 5, 6 2 5, 2 U k U  , and 6,2 5, 5 6 ,5 5,2 6,6 5, 2 6,2 5, 6 UU UU UU UU     (30a) case 6,2 0U  : 6 ,5 1 6,2 U k U  , ... 6,6 2 6,2 U k U  , and 6,2 5, 5 6 ,5 5,2 6,6 5, 2 6,2 5, 6 UU UU UU UU     (30b) case 5, 2 0U  and 6,2 0U  : 1 0k  , 2 0k  , and 6 ,5 6,6 U U ...

Ngày tải lên: 12/08/2014, 05:20

... structure containing symmetrical [19] and asymmetrical [20] discontinuities in a simple and a fast way. The key point is to decompose a given damage Advances in Piezoelectric Transducers ... Will-be-set-by -IN- TECH 0 1000 2000 3000 4000 50 00 −1 −0.8 −0.6 −0.4 −0.2 0 0.2 0.4 0.6 0.8 1 Samples (N) Amplitude (V) (a) Original 0 50 0 1000 150 0 2000 250 0 3000 350 0 4000 450 0...

Ngày tải lên: 12/08/2014, 05:20

... brief introduction to SHM is presented in Section 2, indicating its importance, the main fields of application and the main methodologies involved. The EMI technique is discussed in Section 3. In ... 82, pp 2049-2 055 (1997). [8] E. Moulin, J. Assaad, C. Delebarre et D. Osmont, ‘‘Modelling of Lamb waves generated by integrated transducers in composite plates, using a coupled Fin...

Ngày tải lên: 12/08/2014, 05:20

... Advances in Piezoelectric Transducers 108 ceramics combine the functions of sensor (direct piezoelectric effect) and actuator (reverse piezoelectric effect. In order to obtain the ... by measuring the electrical impedance in an appropriate frequency range. This is the basic principle of damage detection discussed in the next section. Advances in Piezoelectric...

Ngày tải lên: 12/08/2014, 05:20

... Detection in Composite Materials Using Frequency Response Methods. Composites Part B: Engineering , Vol. 33, No. 1, (January 2002), pp. 87- 95, ISSN 1 359 -8368 Advances in Piezoelectric Transducers ... Monitoring. Structural Health Monitoring, DOI: 10.1177/14 759 21711414234 (published online before print), pp. 1-14, ISSN 14 75- 9217 Cawley, P. (1997). Long Range Inspectio...

Ngày tải lên: 12/08/2014, 05:20

... time varying parameters introduce more degrees of freedom in the control design, and in principle more flexibility in shaping the control response. Time variant PIDs can be designed according to ... restricted to linear time invariant systems, as in practice most industrial plants can be represented in such a form, eventually after a linearisation step around the desired operating po...

Ngày tải lên: 19/06/2014, 12:20

... 200 4 .5 5 5. 5 6 6 .5 7 7 .5 8 x 10 −7 Time [seconds] Position error [meters] Fig. 2. Controller Performance: Position Error. 0 50 100 150 200 0 0 .5 1 1 .5 Time [seconds] Magnitude of the adaptive gain ... Comparison 10 Will-be-set-by -IN- TECH 0 1 2 3 4 5 6 7 8 9 10 0 0 .5 1 1 .5 Time (s) u controller Solid line: Conventional PI and single P Dashed line: σ = 0.1, 0. 15, 0. 25, 0...

Ngày tải lên: 19/06/2014, 12:20