Yoshio Mitsutake

Dynamic response analysis of a linear solenoid actuator

This paper proposes a computational method for predicting the dynamic response characteristics of a long stroke-linear solenoid actuator with complicated shaped armature. In this method, the magnetic field is coupled with the electrical supply and the mechanical movement of the actuator, employing the axisymmetric finite clement method (FEM). The influence of applied voltage on the response characteristics are investigated. As the result of that, computational error of 22.8% arises when applied voltage of 4.8 V is fed, however, the error remains less than 2% when the applied voltage is higher; 5.8 V and 6.8 V. These results verify the utility of this method. In addition, the influence of the control method on transient response during positioning control is also examined, and the validity of PID (proportional, integral and differential) control is confirmed.

Dynamic Analysis of Electromagnetic Impact Drive Mechanism Using Eddy Current

This paper presents a dynamic analysis method of an electromagnetic impact (EMI) drive mechanism by 3-D finite element method (FEM). The transient and EMI torque are computed when the interlinkage flux of conductor is rapidly changed. The usefulness of this method is confirmed by comparing the calculated results with the measured ones

Performance analysis of electromagnetic ID transmission system using 3-D finite element method

Great notice is taken of electromagnetic ID (IDentity) transmission systems. Therefore, 3-D numerical analysis is useful for optimum design of high frequency ID card systems which have complex structure. In this paper, the authors propose a new method for computing the transmission performance by employing the 3-D finite element method. In this method, the current vector analysis and the magnetic field analysis are coupled. The effectiveness of this method is clarified through the comparison with the measured results of the induced voltage of the secondary coil. In addition, the influence of the angle formed by the primary and the secondary coils on the directivity is investigated.

Optimal Design of Resonant Filters Employing Genetic Algorithm Combined with Moment Method

This paper presents the optimization method employing the genetic algorithm (GA) combined with the moment method (MOM). This method is applied to a resonant band pass filter (BPF). The validity of the proposed method is confirmed through the comparison of filter characteristics between the initial and optimized geometries

Electron trajectory analysis of field emitter array employing 3-D finite element method

This paper proposes a computational method for predicting the electron trajectories of a field emitter array (FEA) for a light source by the 3-D finite element method (FEM). Using this method, the equation of the electron motion is coupled with the equation of the electric field to compute electron trajectories. Some useful results were obtained by applying this method to a starlike FEA, which the authors have been studying, and by investigating the structure with effective emissions.