Design method of dynamic positioning ship position observer capable of saving communication resources

The invention relates to a design method of a dynamic positioning ship position observer capable of saving communication resources. The method comprises the following steps: establishing a three-degree-of-freedom dynamic model and a kinematic model of a dynamic positioning ship; introducing a sampling data system, and calculating an error between a current state and a sampling state; designing a discrete time output feedback observer based on a feedback control technology; through state estimation, a discrete time dynamic event triggering condition is provided to determine a communication moment, and an event triggering optimal control law capable of saving communication resources is obtained to realize robust stability of the system, so that control input is bounded. According to the observer design method provided by the invention, the ship can be more stably kept in an expected state, the observation performance is ensured by using fewer communication resources, the signal transmission frequency is reduced