Batch-adaptive ship's autopilots

摘要

Sea conditions and ship's motions might be considered as a locally stationary process. This paper proposes an on-line fitting procedure using the AIC to such a process and applies it to design two kinds of batch- adaptive autopilot systems. In the first one, the ship's manoeuvring motion including yawing, rolling and rudder motions are modelled by using a MARX model and at the end of every batch period, an on-line judgement for the following period is carried out by applying the minimum AIC procedure and the best MARX model to represent the present states of the manoeuvring motion. The second autopilot is an extension of the adaptation rule to a noise-adaptive autopilot system. Copyright