The invention belongs to the technical field of
aviation, and relates to a dual-redundancy
hydraulic brake device for a large unmanned aerial vehicle. Comprising a normal
brake unit, an
emergency brake unit and a shutdown
brake unit. A mechanical-electrical-hydraulic combination mode is adopted, mechanical, hydraulic and electronic control technologies, sensing detection technologies and the like are applied, a dissimilar redundant hydraulic device is adopted, a normal
brake unit adopts a
hydraulic control mode, and an
emergency brake unit adopts a current advanced electro-hydrostatic brake
actuator as a hydraulic source. The two
modes are composed, principles and control
modes are completely different, the requirements of multiple functions,
frequent use and good economical efficiency of a normal brake unit are met, the requirements of simple structure and low
failure rate of an
emergency brake unit are met, and the large unmanned aerial
vehicle brake requirement can be well met; the output of the normal brake unit and the output of the emergency brake unit are completely independent, and the reliability and the safety capacity are improved.