新型双层多线圈磁流变制动器研

针对目前磁流变传动技术中普遍存在的工作间隙磁场分布不均和单位体积可传递扭矩较小的关键问题，提出一种具有双层间隙以及沿周向配置多个线圈的新型磁流变制动器。根据结构尺寸，推导了制动力矩的计算公式，建立了磁路分析模型来估算间隙中的磁场强度大小。采用基于自由梯度的BOBYQA优化方法对主要结构尺寸进行优化，得到了优化后结构的磁场强度分布。将间隙磁流变液中磁场强度的仿真值与计算值进行对比，结果表明，该磁路建模方法可以指导结构设计，结构可产生的单位体积力矩值约为2.3×10⁴Nm/m³。其研究成果为双层多线圈磁流变制动器的设计提供理论参考。

Research on a Novel Double layer Multi coil Magnetorheological Brak

In order to solve the problem that the magnetic field strength distribution in the working gaps is not uniform and the braking torque per 1 m³is small in magnetorheological (MR) transmission,a novel MR brake configuration featuring double layer gaps and several coils arranged along the circumferential direction were proposed.An exact closed form expression of the braking torque was derived,and the magnetic circuit modeling was established to estimate the magnetic field strength in the gaps.Then,BOBYQA method was used to optimize the structural sizes,and the magnetic field strength distribution was conducted.Simulation was compared with the calculation of magnetic circuit.The results showed that the magnetic circuit modeling can guide the structure design,and the torque per 1 m³generated by the designed MR brake is about 2.3×10⁴Nm/m³.The research results provides a theoretical reference for the design of double layer multi coil MR brake.