Abstract
In this paper we focused on Modeling and Simulation of environmental disturbances for ocean Surface Vehicle. We developed ship simulation system for simulating ship motion in a virtual environment with respect to environment disturbances such as sea wave, wind and sea currents. This system simulates ship motions in six degrees of freedom, pitch, heave, roll, surge, sway, and yaw. This system is simple and responds in real-time to interactions and it is based on a mathematical ship model. The mathematical ship model is derived from the non-linear speed equations, Newton’s laws, fluid dynamics and other basic physics. We use multivariable functions to model the ocean surface with superposition of sinusoid functions and the ship model requires fewer amounts of ship data and the mathematical ship model can be used with different types of ships and it can be used in real time virtual reality applications. DOI: http://dx.doi.org/10.4038/sljp.v10i0.3834 Sri Lanka Journal of Physics, Vol. 10 (2009) 39-57
Highlights
Modeling and Simulation of environmental disturbances for ocean Surface vehicle have been used in ship simulators for naval training, ship hull designing, simulates military science and entertainment activities such as computer games
8 Conclusion and future work The proposed six degrees of freedom ship motion prediction system works at a fraction of real-time with 2.8GHz computational power (CPU)
This model can be used for long term motion prediction and it uses standard model parameters which are possible to evaluate with standers techniques
Summary
Modeling and Simulation of environmental disturbances for ocean Surface vehicle have been used in ship simulators for naval training, ship hull designing, simulates military science and entertainment activities such as computer games. There are commercial ship simulation systems with six degrees of freedom such as Transas and Oceaniccorp simulation systems [1,2] These systems use six degrees of freedom ship motion prediction algorithms with environmental disturbance simulations but those systems extremely expensive, too complicated and proprietary. There are few six degrees of freedom (6DOF) ship motion prediction algorithms proposed my researchers [7,8]. Sandaruwan et al / Sri Lankan Journal of Physics, Vol 10 (2009) 39-57 of predicting real-time 6DOF ship motions with respect to environmental disturbances. Some those algorithms have large number of model parameters or over simplified and some real world scenarios cannot be simulated
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