Several Methods for Computing Transducer Head Velocities for Large Arrays.

摘要

Large transducer arrays are used in active sonar systems to emit powerful, directional sound beams. The transducer head velocities must be known in order to accurately determine the steady state source level and directivity patterns of these arrays. The values for these velocities depend upon the electrical driving conditions, the equivalent circuit of the transducers, and the geometry of the array. In addition, the calculation of these velocities generally requires the inversion of a complex matrix of order N, where N is the number of transducers in the array. For the case where the array has no symmetry and possesses more than 56 elements, direct inversion of the entire matrix is not practical, and due to storage limitations may not be possible. Several methods are presented here for computing transducer velocities for very large arrays when the self and mutual impedance coefficents and the driving forces are known for all the array elements. (Author)