Design and application of an Electric Tail Rotor Drive Control (ETRDC) for helicopters with performance tests

Robust Control of Electric Tail Reduction System: Uncertainty and Performance Index

“…Definition 1. We define d as the infimum of the size of the uniform ultimate boundedness d, which can be written as d = λ M (P) λ m (P) R = λ M (P) λ m (P) ε κ||µ|| 3 where d = d − ε; d is the uniform ultimate boundedness; and ε can be a positive constant (arbitrarily small) [30]. For any t 0 , the system performance index J(κ) is expressed as…”

“…Compared with fixed-wing unmanned aerial vehicles (UAVs), the rotor UAV has the characteristics of vertical take-off and landing, hovering, and flight at very low altitude, so it is used in a wider spectrum of applications [2]. With the rapid development of battery and motor technology, the advantages of unmanned electric helicopter have gradually been reflected [3]. On one hand, compared with the traditional fuel helicopter, the electric unmanned helicopter has the characteristics of lower noise, smaller vibration, higher reliability, and no pollution.…”

“…Similar to the trend of aircraft electrification known as the "More Electric Aircraft" (MEA) approach, helicopter propulsion system and its flight control devices are undergoing a system optimization using electric actuators [3]. The electric tail reduction system of the unmanned helicopter is a typical electric actuator integrated system composed of a permanent magnet synchronous motor, reducer, and tail rotor, which is based on the background of independent speed control of the main rotor and the tail rotor.…”

“…For these reasons, some scholars have undertaken related research. Han and Barakos studied variable tail rotor speed as a method to improve helicopter performance [17], and a dynamic response platform for collecting the thrust of an independent electric tail rotor was built by Zhang [3].…”

Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator

“…However, many systems have been commercially electrified, such as fuel valve actuation and ejector seat actuator [6]. Furthermore, numerous studies analysed the feasibility and effects of electrification of not yet commercialised systems, for instance, swash-plate control [7] and tail rotor control [8].…”