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The impedance is often used as a measurement to represent the dynamics of an intelligent material system. This study attempts to combine the theoretical analysis and the finite element method to establish relationships between input efforts and output effect at the boundaries of a piezoelectric membrane. At first, vibration analysis of a piezoelectric membrane under harmonic excitation is conducted,...
Piezoelectric structures achieve structural control by using electromechanical coupling characteristics, therefore, their design and analysis involve interaction between mechanical system and circuit system inevitably. Based on the analogy between governing equations of mechanical system and circuit system, equivalent relation is established in the paper. Using the analogy relations, the piezoelectric...
In order to comprehensively understand magnetic field distribution in soft magnetic composite (SMC) materials which apply to three-dimensional (3-D) flux electrical machine design, 3-D reluctivity tensor should be taken into account. A 3-D magnetic properties testing system fitting for cubic SMC sample has been constructed and calibrated by means of finite element method (FEM). According to the experimental...
Single-sided linear induction motors (SLIMs) have been widely applied in transportation recently. For its cut-open magnet circuit along moving direction and different width between primary and secondary, it has longitudinal end effect and transversal edge effect, which bring some efflucence to its mutual inductance and secondary resistance. Furthermore, SLIM has normal force for its unsymmetrical...
Single-sided linear induction motor (SLIM) is widely used in transportation and other field in need of linear drive for their simple, firm structure and linear motion feature without the translation mechanism. But end effect in SLIM deteriorate the performance for the discontinuous magnetic circuit. This paper analyzes 2-D transient electromagnetic field of SLIM by finite element method (FEM). The...
Single-sided linear induction motor (SLIM) has many advantages, such as simple structure, easy maintenance, less environmental pollution and direct drive without the translation of mechanisms etc. However, longitudinal end effect deteriorates the performance because of the discontinuous magnetic circuit in SLIM. In this paper, the 2-D transient electromagnetic field of SLIM is computed using finite...
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