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Minimization of time to reach final speed in planing craft by optimal control of drive and trim tab angles

Yengejeh, M. A ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. Publisher: FAST 2013 Secretariat , 2013
  3. Abstract:
  4. Properly adjusting the trim angle during the craft speed up, plays an important role in easily passing through the resistance hump and to reach final speed in minimum possible time. Present study tries to reply to this question that how the angles applied to a trimmable drive system and trim tab of the planing craft should be changed during speed up from rest, to craft reach a final speed in minimum time. This is a time-optimal control problem with the drive and trim tab angles as its control variables. To solve this problem a 3-DOF dynamic model is developed here rely on empirical data and relations. For the propulsion system operation of propeller, drive and engine altogether are taken into account. Then the solution algorithm of time-optimal control problem is explained and results for a typical planing vessel are presented in two different weight distributions
  5. Keywords:
  6. Sailing vessels ; Planing vessels ; Control variable ; Optimal controls ; Planing crafts ; Optimal control systems ; Propulsion system ; Solution algorithms ; Time-optimal control problems ; Weight distributions ; Digital storage
  7. Source: FAST 2013 - 12th International Conference on Fast Sea Transportation ; 2013