Electrical Resistivity Characteristics Of Electromagnetic Environment Of Control Engineering Research

The electromagnetic fields excited by electromagnetic actuators and the CPW can achieve electromagnetic force control in the electromagnetic fluid control engineering. At the same time, these electromagnetic fields may cause attacks from magnetic mines or be the source of magnetic detection. Comprehensive and accurate understanding and knowledge space magnetic field distribution in the electromagnetic fluid control engineering relates to the magnetic protection of the underwater craft, the use of magnetic mines tactical and magnetic exploration technology. In this paper, we use a combination mode of theoretical studies and numerical simulation, analysis and discussion of the surrounding electromagnetic environment characteristics of the object which covered with electromagnetic actuators or arrangement with CPW in the electromagnetic fluid control engineering.We simulate the electromagnetic environment around the electromagnetic actuators and the CPW by finite element method, summarizing the following two contents.The electromagnetic environment characteristics around the electromagnetic actuators: We simulate the electromagnetic actuators, then we know the spatial distribution of its surrounding electromagnetic. The electric field distribution and the magnetic field distribution on the electromagnetic actuators surface and surrounding both show a certain degree of regularity. On the surface of the electromagnetic actuators, the magnetic field intensity is similar to the sine curve distribution. The whole electrode is an equipotential surface, the electric potential on the magnetic pole distributed from high to low or from low to high, The electric and magnetic fields both decay in space. For the electromagnetic actuators model built in this paper, where0.15m close to the surface of the electromagnetic actuators the magnetic field is less than the marine background magnetic field. This distance is very small relative to the size of the underwater craft. It can achieve electromagnetic force control and it does not increase the risk of the underwater craft.The electromagnetic environment characteristics around the CPW:We simulate different CPWs, through simulation analysis and data comparison, the CPW in the air, its surrounding electromagnetic fields are regularly distributed and along the CPW direction propagates forward, almost no attenuation in the direction of propagation. The CPW in the seawater, its surrounding electromagnetic field has its rules, and in the dissemination process, the higher the wave frequency, the quicker the decay. For different frequencies of electromagnetic waves transmit on the surface of CPW in seawater, the impact of low-frequency electromagnetic waves is relatively small. Whether the spatial distribution of the electromagnetic field, or transmission in the sea water along the CPW, Low-frequency electromagnetic waves, its distribution and transmission results are better than the high-frequency electromagnetic waves. If want to use CPW achieving electromagnetic force control effectively, we must reduce the relative permittivity of the surrounding of the CPW, or reduce electromagnetic wave frequency. For the CPW model built in this paper, where2mm close to the surface of the CPW the magnetic is less than the marine background magnetic field, decaying very fast in seawater. Apply CPW to the underwater craft can achieve optimal control and it does not increase the risk of the underwater craft.According to the researches about the electromagnetic environment characteristics around the Electromagnetic actuators and the CPW in the electromagnetic force control engineering, we know that in the control engineering they achieve electromagnetic fluid control while their Electromagnetic environment is safe.