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論文

論文
小島, 宏行 ; 根津, 紀久雄 ; 坂本, 賢治 ; 川鍋, 隆 ; 小島, 英男
出版情報: 日本機械学會論文集. C編.  56  pp.1505-1510,  1990-06-25.  日本機械学会
概要: application/pdf<br />Journal Article<br />A rapid position control method, to which the feedforward control based on the inverse dynamics is applied, is presented, and the availability is confirmed experimentally and theoretically. In the experiment, the linear direct current motor is made with an aluminum coil frame or an acrylic resin frame. Then, it is confirmed that, by the present control method, the moving part of the linear direct current motor can be controlled exactly to the position control command for an arbitrary settling time, without undesirable mechanical vibrations. When the settling time is comparatively long, the wave shape of the control current of the motor is affected mainly by the spring force of the beam. Then, with a decreasing value of the settling time, the inertia force has significant effects on the wave shape of the control current. Furthermore, the numerical simulation results obtained by the finite element method agree well with the experimental results. 続きを見る
2.

論文

論文
武田, 定彦 ; 長屋, 幸助 ; 永井, 健一 ; 井開, 重男
出版情報: 日本機械学會論文集. C編.  55  pp.1616-1621,  1989-07-25.  日本機械学会
概要: application/pdf<br />Journal Article<br />This paper presents theoretical and experimental results for the steady state response of a relaxation-suspension system considering the unsymmetrical damping force under periodic excitation. the unsymmetrical damping force has two different values in period of the stroke velocity. In the analysis, exact solutions are obtained by considering the continuity of the response at the boundary in which the damping force varies. Numerical calculations are carried out for various values of the ratio of the damping coefficient. It is found that the reference line of the vibration in the relaxation-suspension system maintains a constant value within the range of the high frequency ratio, while the reference line in the direct-suspension system varies proportionally to the change of frequency ratio. The experimental values agreed fairly well with the theoretical results. 続きを見る
3.

論文

論文
長屋, 幸助 ; 武田, 定彦 ; 井開, 重男 ; 永井, 健一 ; 松本, 康臣 ; 塩野, 二朗
出版情報: 日本機械学會論文集. C編.  55  pp.1353-1356,  1989-06-25.  日本機械学会
概要: application/pdf<br />Journal Article<br />This paper proposes an active control damper using an electromagnetic fluid, and presents an expression for obtaining the damping coefficient of the damper. The damping coefficient has been obtained by using the solution of the equation for the electromagnetic fluid which includes both Navier-Stokes' equation and Maxwell's equation. Numerical calculations have been carried out for some sample problems, and the effects of sizes of the damper and the magnetic flux density on the damping coefficients have been clarified. 続きを見る