Shinichiro Fujikawa

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A detailed six degree-of-freedom (DOF) nonlinear dynamic model of an Unmanned Sea Surface Vehicle (USSV) is developed. Models of the significant hydrodynamic effects including radiationinduced and damping forces and moments are incorporated. Disturbance models of forces and moments caused by ocean currents, waves, and wind are also included. Detailed models(More)
This paper describes the development of a diagnostic expert system that identifies the cause of various manufacturing defects in hot forging and suggests remedies. The patterns of defect generation are various and due to many possible causes. They depend on part designs, tool designs and process conditions. Pertinent factors include part shape, the state of(More)
The paper describes hardware development for a small helicopter and a hardware-in-the-loop (HITL) simulator for flight control system and obstacle avoidance testing and validation. The proposed obstacle avoidance system (OAS) is briefly outlined. The HITL simulator is developed to closely mimic the behavior of the actual flight hardware so as to easily(More)
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