Abstract
This explanatory paper investigates the fundamental characteristics and aircraft applications of magnetorheological fluid brakes (MRBs). MR fluids exhibit field-dependent yield stress, enabling rapid, controllable braking without mechanical friction. Experiments on single-disc, multi-disc, cylindrical MRBs revealed current-proportional torque, particle-size effects, and significant temperature dependence. Scaling analysis showed that aircraft-level torque requires multi-disc structures and optimized magnetic circuits. A rejected takeoff (RTO) simulation using a long short-term memory (LSTM)-based MRB model demonstrated stable slip control and sufficiently deceleration.
