Research On Simulation Of Heaving Line’s Operation In Navigation Simulator

When the ship is berthing, the most important step is how to tie the first cable been on the bollard. The specific operating processes is that the deck crew throws the heaving line to the shore, and then the dock workers pull the heaving line until the cable also gets on the dock, finally, they put the eye splice on the bollard. Heaving line is an important basic skill for the deck department crew. Traditional training is in the specialized training grounds, students imitate a professional’s presentations. There are several drawbacks of such training:occupied large sites; easily affected by weather; fifth, has certain risk. With the rapid development of simulation technology and virtual reality techno-logy, developing the simulator of the heaving line unit is possible. If heaving line training can be done in the simulator, there will undoubtedly improve the training conditions which can solve the shortcomings of traditional training:long cycle, high cost and the risk of training. In order to achieve the above purpose, the main resea-rch contents of this paper are summarized as follows:1. Based on the lump-mass model, this paper builds the mathematical model for the rope by using spring-mass model, and realizes the visualization of the heaving line.2. Based on the above model, the paper uses the ball-bar element to build the rope’s mathematical model. In this method, Kawabata tensile strain model is adopted to consider the impact of air friction.3. Author constructs the three-dimensional model of the virtual hand by OpenGL graphics API. The virtual hand’s movement is controlled by changing the parameters of the coordinate system conversion.4. Vhand2.0Data glove is used as the human-computer interaction tools to complete the virtual hand’s movement controlling, the dynamic simulation of heaving line operation, implemented after finishing the movement mapping form real hand to virtual hand.