Magnetorheological Hydrostatic Actuator

Magnetorheological (MR) hydrostatic actuators combine the advantages of MR fluids' controllable viscosity with the smooth, high-force capabilities of hydrostatic transmissions. Current research emphasizes improving force control precision and bandwidth, particularly at low forces, through advanced control algorithms like LQGI state feedback and techniques such as friction compensation. This focus stems from the need for lightweight, backdrivable actuators in applications like wearable robotics and haptic devices, where precise force control is crucial for safe and effective human-robot interaction. The resulting actuators offer high power density and improved performance compared to traditional electric motors, particularly in applications requiring high bandwidth and low inertia.