Advances in Piezoelectric Transducers Part 6 pdf

... 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   (30c) In Eq. (29), the scaling ... 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) cas...

Ngày tải lên: 12/08/2014, 05:20

... equation:   cos cosh cos cosh sin sinh . sin sinh nn nn n n n n nn kl kl Xx A kx kx kx kx kl kl    (11) Assuming zero initial conditions and taking into account that the deflection ... 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 moments acting in...

Ngày tải lên: 12/08/2014, 04:22

... 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 ... (64 ) 6 1 cos 1 sin , ZP P Z P RC C       (65 ) 7 1 sin 1 cos . ZP P Z P RC C       (66 ) Using mathematical dependences: cos sin , it eti...

Ngày tải lên: 12/08/2014, 04:22

... amplitude and to avoid false data interpretation in plates containing a hole of variable diameter. This Advances in Piezoelectric Transducers 94 Fig. 6. Comparison between numerical and ... 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...

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... virtual instrumentation are fast and extremely versatile, allowing adjustments to be easily incorporated in accordance with the user needs. Advances in Piezoelectric Transducers 1 06 This ... 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 i...

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 1359-8 368 Advances in Piezoelectric Transducers ... Acousto-Optic Interaction, Applications, Vol. 2, 4 46 p., Springer, Berlin Rytter, A. (1993). Vibration Based Inspection of Civil Engineering Structures. Department of Build...

Ngày tải lên: 12/08/2014, 05:20

... shown in Figure 6. Again, the comparison 0 10 20 30 40 50 60 70 −0.8 −0 .6 −0.4 −0.2 0 0.2 0.4 0 .6 Time (s) y(t) Reference signal PI VIPI API FAPI 45 50 55 60 −0.8 −0 .6 −0.4 −0.2 0 0.2 0.4 0 .6 Time ... in terms of the absolute value and its derivative; for this reason it is particularly suitable in particular control applications: for instance when control components with...

Ngày tải lên: 19/06/2014, 12:20

... disturbances and varying parameters of the plant model given by (60 ). In other words, the control design problem (61 ) has been reformulated as the requirement (66 ). 130 Advances in PID Control PI/PID ... PID Tuning Rules, London: Imperial College Press, ISBN 1 860 9 462 24. Porter, W.A. (1970). Diagonalization and inverses for nonlinear systems, Int. J. of Control, Vol. 11, No. 1, pp...

Ngày tải lên: 19/06/2014, 12:20

... model, and the 2 56 Advances in PID Control Advances in PID Control 250 Yu, C. C., 20 06. Autotuning of PID Controllers: A Relay Feedback Approach. 2nd Edition, Springer, 20 06. Wang, Z.P., ... giving the 253 PID Application: RTLS Advances in PID Control 260 In our work we introduce a simple method for implementing PID controllers. Some other contributions focused...

Ngày tải lên: 19/06/2014, 12:20