差分磁场结构线性磁力分析及实验

Analysis of the Linear Magnetic Force in Difference Structure and Experiment

针对磁场的特性——永磁体相互作用力的非性线问题,提出一种采取永磁体差分结构,获得高阶线性磁场力的方法。文中以永磁体间相互作用力公式出发,推导永磁体差分结构线性磁场力的高阶近似公式,采用实验方式以及最小二乘法计算磁场力公式的参数,设计通过恒定加速度激励下差分结构的响应实验,有效地验证了差分结构磁场力与位移的关系与理论分析非常符合,相对误差在2%以内,这将对磁场力在各领域的应用有一定的意义。

Against to the no-linear problem appearing in the field of the magnetic force,this paper designs a difference structure base on the magnet in order to get the linear magnetic force.Some theory expressions are developed to calculate the linear magnetic force.An experiment is carried out to solve the key parameter which is proved by the least-squares procedure.Another experiment to validate the expressions of the linear magnetic force is designed.There is only 2% error in the results between experiment and the theory.The conclusion indicates that the experiment result is agreed with the theory result.Thus the difference structure for linear magnetic force is significative.