Ship dynamic positioning method based on improved strong tracking filter state observer

The invention discloses a ship dynamic positioning method based on an improved strong tracking filter state observer. The method comprises the following steps: acquiring the position and heading of a ship; filtering noise part in the position and heading of the ship by utilizing the improved strong tracking filter state observer, and transmitting an obtained estimated value of the position and heading of the ship meeting the precision requirement to a PID controller; outputting a control force and a torque according to an expected value of the position and heading of the ship and the received information by the PID controller, and controlling the motion of the ship. By adopting the method, under the situation that the external interference is suddenly changed, the tracking filter effect is better, and the stability of the ship can be improved.