Active vibration cancellation system using piezoelectric elements for towed acoustic array

An active vibration cancellation system for a towed acoustic array, the active vibration cancellation system comprising:

• two or more piezoelectric elements within an array cable of the towed acoustic array, the two or more piezoelectric elements including a measurement piezoelectric element and a vibration cancellation piezoelectric element, each piezoelectric element comprising piezoelectric material provided around a jacket of an inner base cable of the array cable;
• and
• a vibration controller within the array cable, the vibration controller configured to receive vibration data from the measurement piezoelectric element and inject vibration cancellation signals into the vibration cancellation piezoelectric element to reduce vibrations along the array cable,
• wherein the piezoelectric material of the piezoelectric elements comprises a seamless monolithic structure controllable by a single control signal.

A method for reducing vibrations in a towed acoustic array, the towed acoustic array configured for measurement of acoustic signals underwater and comprising an array cable having a plurality of acoustic sensing modules distributed along a length of the array cable, the method performed by processing circuitry of an active vibration cancellation system, the method comprising:

• receiving vibration data at a vibration controller from a measurement piezoelectric element;
• and
• injecting vibration cancellation signals by the vibration controller into a vibration cancellation piezoelectric element to reduce vibrations along the array cable,
• wherein each piezoelectric element comprises piezoelectric material provided around a jacket of an inner base cable and comprises a seamless monolithic structure controllable by a single control signal.