Systems and methods for navigating autonomous underwater vehicles

摘要

Systems and methods are described herein for a variable-depth sonar. A null in the frequency response between a first and second operating frequency band is identified. A center operating frequency for each of the first and the second operating band is adjusted based on the ambient pressure. Furthermore, the velocity state of a vehicle may be calculated using periodic velocity updates. At least one transducer transmits a first signal in a first direction, and a Doppler sensor receives an echo of the first signal. The vehicle is turned in a second direction, and the at least one transducer transmits a second signal in the second direction. Using the first and the second velocity measurement, a vehicle velocity state is calculated.

主权项

1. A method for using variable-depth sonar, comprising:
determining one or more frequency bands for sonar equipment; identifying nulls in a frequency response based on the one or more frequency bands; determining an ambient pressure applied to the sonar equipment; and adjusting a center operating frequency for the one or more frequency bands based on the ambient pressure and the identified nulls in the frequency response.