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Autonomous Underwater Vehicles (AUVs) have been widely used in scientific or industrial operations over the past years. AUV missions require the vehicle to perform a set of actions autonomously and return to the operators. These missions are currently mostly planned offline by the human operators. Existing solutions in commercial planning software usually only provide an estimate of the mission execution...
Energy awareness and fault tolerance are important aspects for extending the autonomy levels of today’s autonomous vehicles. With the aim of preparing the way for persistent autonomous operations of underwater vehicles this work focusses its efforts on investigating the effects of actuator failures, on an autonomous underwater vehicle (AUV) capable of long-term inspection missions. This paper introduces...
Autonomous Underwater Vehicles (AUVs) are required to carry out a mission with minimum supervision. Often, the AUV's hardware integrity is compromised amidst operation; thus, jeopardising the mission's success. Thruster failures, for example, may affect AUVs locomotion. Following a thruster failure, the plan may require changes to compensate, if possible, for the loss of mobility. In this paper, we...
Autonomous underwater vehicles have proven their roles as useful tools for scientific exploration and data gathering. The current state of the art in commercial vehicles involves a statical mission planning phase which does not take into account any energy or time limits. This work proposes the use of a mixed integer quadratic programming solution that maximises the utility of data gathering missions...
This paper introduces an adaptive tuning method for the controllers of a 4 degrees-of-freedom autonomous underwater vehicle. The proposed scheme consists of two control loops, one for position control and an inner one for velocity control. The gains of the controller are determined on-line, according to the position/velocity errors. Using the proposed adaptive architecture, the uncertainties in the...
This work introduces a low-cost energy measurement method and proposes a simple linear model to estimate the vehicle energy consumption when navigating a given trajectory. Experimental results on Nessie VII AUV show that the developed system can be used to measure the energy used during the vehicle's operations with a good confidence level. Moreover the proposed estimation model can be trained using...
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