Hiroaki Kagaya

On-Track Test and Dynamic Simulation of Back Gauge of Gauge Changing Train

Gauge changing train is developed to realize through operation between standard gauge and narrow gauge. The wheelset of gauge changing train has small lateral clearance and torsion stiffness in wheelset assembly. Thus the amount of change of back gauge is larger than that of solid wheelset. To prevent the wheelset from misguiding (running into wrong track), it must be verified that the wheelset always keep back gauge in the predetermined range. This paper describes the relation between lateral force and back gauge by on-track test. Especially, while the wheelset passes turnouts, the back side of wheel contacts with a guardrail and large back lateral force widens back gauge. The amount of change of back gauge increases according to increase in lateral force, but is saturated at a certain value. The safety margin against misguiding is secured enough even when the maximum lateral force is loaded at turnout passing. Also, in this paper, numerical simulations using the simple wheelset model are performed. The characteristic of gauge changing wheelset is modeled by clearance, torsion stiffness and rolling friction. Authors confirmed that the results of on-track test are well reproduced by the wheelset model.

Mechanical control technology and applying to ship maneuvering control system

This paper describes the control technology depending upon the controlled objects. There are two kinds of control methods: one is process control, which is applied to plants, and the other is servo control, which is applied to mechanical system such as active vibration control for bridges or high-speed rolling stocks, and tracking control of mobile stages. Moreover, this paper presents newly developed dynamic positioning system, as applied to ship maneuvering control system which is the novel achievement of our development. Thus this control technologies makes it possible to enhance greatly the function and performance of another products as well. Therefore we advances the improvement of technology in the field of nonlinear control.