Jaswar

Designing Fuzzy Backstepping Adaptive Based Fuzzy Estimator Variable Structure Control : Applied to Internal Combustion Engine

A Multi Input Multi Output (MIMO) fuzzy estimator variable structure control (VSC) which containing an on-line controller coefficient tuned with the aim of a fuzzy back stepping algorithm. Satisfactory trajectories tracking among the internal combustion engine (IC engine) air to fuel ratio and the preferred input is certified in this paper. The fuzzy controller deployed in developed fuzzy estimator variable structure controller works using Lyapunov fuzzy inference system (FIS) with least model based rule base. Function among variable structure function, error and the error’s rate is represented by model. The outputs show fuel ratio. The fuzzy back stepping tactic is an on-line variable structure function fixing with the aim of an adaptive approach. MIMO fuzzy estimator and VSC performance with an on-line fuzzy back stepping algorithm (FBAFVSC) tuned with the aim of controller coefficient is confirmed using a comparison with VSC and planned approach. Simulation outputs indicate excellent presentation of fuel ratio in attendance of ambiguity and exterior annoyance.

TLP Motion Effect on Semisubmersible Motion

Floating structures play an important role in exploring the oil and gas from the sea. In loading and offloading, motion responses of offshore floating, structures are affected through hydrodynamic interaction. Large motions between floating bodies would cause the damage of moorings, offloading system and may colloid to each other. This research discussed on the hydrodynamic interaction between Tension Leg Platform (TLP) and Semisubmersible (Tender Assisted Drilling (TAD)) in regular waves with the scenario of 6-DOF both TLP and semisubmersible. The experiment is carried out in the Universiti Teknologi Malaysia (UTM) Towing Tank using semisubmersible GVA 4000 type. As primarily study, the experiment was conducted without Tension Leg. The wave height in full-scale ranges from 5.8 m - 11 m and separation distance of the models is 21.7 m. The results shows that surge, heave and pitch responses amplitude located at frequency 0.3 rad/s and 0.9 rad/s.