Abstract
The aim of this paper was to demonstrate the improved functionality and performance of an electromechanical brake for a helicopter main rotor, which to date has been hydraulically actuated using a disc brake and caliper arrangement. Increasingly, designers seek higher performing solutions to traditional problems through the integration of modern actuation and control strategies. This electromechanical device is required to constrain the helicopter tail rotor shaft protruding from the main rotor gearbox to allow safe taxiing and storage of the helicopter. A systematic and rigorous design methodology was used to converge on an effective solution which satisfied a very demanding specification. The design was further detailed and optimized, leading to the development of a prototype at a high technology readiness level that was tested within a bespoke rig, simulating the torque requirements found on a helicopter main rotor using the torque and position control. The design was shown to meet the required holding torque whilst providing additional functionality of continuous holding capability and meeting the challenging volumetric constraints.
Highlights
In recent years, the complexity of products and devices has increased substantially to meet the increasing demands of customers, to open up new opportunities and increase functionality and performance
More power dense machines will be needed to serve increased power requirements in these mass-critical applications whilst having a considerable advantage over other prime movers when considering environmental and economic factors. Such a system is an electromechanical brake designed for helicopters
This device was designed to operate in series with a regenerative brake system
Summary
The complexity of products and devices has increased substantially to meet the increasing demands of customers, to open up new opportunities and increase functionality and performance. Auxiliary functions previously powered hydraulically or pneumatically are being replaced by electrically powered systems. More power dense machines will be needed to serve increased power requirements in these mass-critical applications whilst having a considerable advantage over other prime movers when considering environmental and economic factors. Such a system is an electromechanical brake designed for helicopters. Disc brake systems suffer from inhomogenous heating and hydraulic systems are generally bulky, complex and prone to leakage [3]
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