Fig. 8 Revolution Control with Conventional Governor(1)
Fig. 9 Revolution Control with Conventional Governor(2)
4.3 Results of Control with DDVC System
As the step of study; the authors confirmed the performance of control with DDVC System with computer simulation.
One of the results of simulation is shown in Fig.11.
In this system, the authors are using conventional control algorithm, and had a good control performance. It shows that the actuator, which has a faster characteristics of response can improve control performance.
This result gave us a good expect for experiments, but unfortunately we cannot report it in this paper.
5. CONCLUSION
In this study, it was estimated that the Main Engine Revolution Control with DDVC system has higher controllability than the most dangerous problem, that is destruction of main engine in rough sea.
Confirming this result we are preparing for the experiments on Shioji Maru. As shown in former chapter, the experimental system has already equipped on the ship. Then we would like to introduce a part of results of experiments at the conference.
This means that DDVC system has the capability of solving conventional control system for the problem of periodical disturbance with rough sea condition.
REFERENCE
[1] M. ITO, H. SATO, Y. MAEDA, Direct Drive Volume Control of Hydraulic System and its Application to the Steering System of Ship, Proc. of FLUCOME '97, Vol. 1, pp445〜450.
[2] T. NAKATANI, K OHTSU, T. HOTTA, N.HIROSE, Study of Governor System for Main Engine Considering Ship Motion, Proc. of 60th Meeting for Marine Engineering, pp101〜106.
