For realizing non-contact steering swimming of a capsule robot in curved environment filled with viscous liquid, based on spa- tial orthogonal superposition theorem of alternating magnetic vectors, an innovative physi...For realizing non-contact steering swimming of a capsule robot in curved environment filled with viscous liquid, based on spa- tial orthogonal superposition theorem of alternating magnetic vectors, an innovative physical method is proposed, which em- ploys three-axis orthogonal square Helmholtz coils fed with three phase sine currents to create a universal uniform magnetic spin vector as energy source. According to the antiphase sine current superposition theorem generalized in this paper, an effec- tive control method for successively adjusting the orientation and the rotating direction of the universal magnetic spin vector is proposed. For validating its feasibility and controllability, three-axis Helmholtz coils, power source and an innovative capsule robot prototype were manufactured, experiments were conducted in both spiral pipe and animal intestine. It was demonstrated that the orientation and the rotational direction of the universal uniform-magnetic spin vector can be adjusted successively through digital control and steering swimming of the capsule robot in spiral intestine can be achieved successfully. The breakthrough of the universal rotating uniform-magnetic vector will push forward the development of modern physics and biomedical engineering展开更多
变压器保护的核心问题是励磁涌流和内部故障电流的鉴别,而对变压器励磁涌流和内部故障电流的有效仿真是进行正确鉴别的基础。在分析电磁暂态仿真软件EMTDC(Electro-Magnetic Transient in DC System)里变压器模型的基础上,构建模型对变...变压器保护的核心问题是励磁涌流和内部故障电流的鉴别,而对变压器励磁涌流和内部故障电流的有效仿真是进行正确鉴别的基础。在分析电磁暂态仿真软件EMTDC(Electro-Magnetic Transient in DC System)里变压器模型的基础上,构建模型对变压器励磁涌流和内部故障电流进行了仿真,并对仿真结果进行了间断角和二次谐波含量分析。结果表明,利用EMTDC能够根据不同的条件和要求有效地实现变压器励磁涌流和内部故障电流的仿真。展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 60875064,61175102,and 51277018)
文摘For realizing non-contact steering swimming of a capsule robot in curved environment filled with viscous liquid, based on spa- tial orthogonal superposition theorem of alternating magnetic vectors, an innovative physical method is proposed, which em- ploys three-axis orthogonal square Helmholtz coils fed with three phase sine currents to create a universal uniform magnetic spin vector as energy source. According to the antiphase sine current superposition theorem generalized in this paper, an effec- tive control method for successively adjusting the orientation and the rotating direction of the universal magnetic spin vector is proposed. For validating its feasibility and controllability, three-axis Helmholtz coils, power source and an innovative capsule robot prototype were manufactured, experiments were conducted in both spiral pipe and animal intestine. It was demonstrated that the orientation and the rotational direction of the universal uniform-magnetic spin vector can be adjusted successively through digital control and steering swimming of the capsule robot in spiral intestine can be achieved successfully. The breakthrough of the universal rotating uniform-magnetic vector will push forward the development of modern physics and biomedical engineering
文摘变压器保护的核心问题是励磁涌流和内部故障电流的鉴别,而对变压器励磁涌流和内部故障电流的有效仿真是进行正确鉴别的基础。在分析电磁暂态仿真软件EMTDC(Electro-Magnetic Transient in DC System)里变压器模型的基础上,构建模型对变压器励磁涌流和内部故障电流进行了仿真,并对仿真结果进行了间断角和二次谐波含量分析。结果表明,利用EMTDC能够根据不同的条件和要求有效地实现变压器励磁涌流和内部故障电流的仿真。
