THE BULLETIN OF NATIONAL INSTITUTE of TECHNOLOGY, KISARAZU COLLEGE

A method for calculating the motion of the double pendulum using a hybrid computer is described in this paper. Macro assembly language is used in this computation. As it is hard to understand the motion of the double pendulum when the results of computation are shown only in figures, those motions are displayed in X-Y oscilloscope. The results of computation using the hybrid computer are investigated and compared with the results of the analytic solution.

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Simulation and analysis of a dynamic system using a hybrid computer is described in this paper. We consider a cart mounted two inverter pendulums as an example of this model. Both of pendulums are set up an only control force which moves the cart back and forth. We investigated about setting up a large number of pendulums which have each different eigenvalue in the analytical study. From the preceding result, we could confirm the condition of setting up pendulums by the non-linear control switching on normal coodinates and examine situations of pendulum's motion in detail.

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Generally we use 3 Phase Wattmeter for 3 Phase Power measuring. But this method is not good for a control system. We made a device for this porpose using IC multnplieres. This device obtained good characteres for time delay and small power consumption.

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Purpose of the study was to determine starting times (ST's) toward four different directions of five varieties of foot position, and considerations were made with respect to their directional property and speed property. The subjects for this study were four high school athletic club members. Shown in Fig. (I). The times from the presentation of the stimulus lamp to the response of the subjects lift up the starting board and make contact the landing board were measured in milliseconds by an ordinary electric chronometer device. As Table 2 and Fig. 1 shows, the both legs ST's (Foot position I) were the longest of all ST's, (F.P.II) (III) (IV) (V), while the left, right-leg driving step ST's (F.P.II) were relatively short. The both legs jumping ST to the back ward direction were better than those to other directions. While one leg steping ST's to the left ward and the right ward direction were better than those to other directions. Comparing the left-leg with the right-leg drive, one subject showed the letter was shorter than the former, three subjects in the former were shorter.

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