Authors: Sheng Liu Liang Fang
Publish Date: 2008/06/19
Volume: 6, Issue: 3, Pages: 62-67
Abstract
Given the uncertainty of parameters and the random nature of disturbances that effect a ships course a robust course controller should be designed on the basis of rudder/flap vector control This paper analyzes system uncertainty and the choice of weighting functions is also discussed When sea waves operate on a ship the energyconcentrating frequency varies with the angle of encounter For different angles of encounter different weighting functions are designed For the pole of a nominal model existing in an imaginary axis the bilineartransform method is used The “2Riccati” equation is adopted to solve the H∞ controller A system simulation is given and the results show that compared with a PID controller this system has higher course precision and more robust performance This research has significant engineering value
Keywords: