Results 41 to 50 of about 111,602 (208)
Comparison of predicted engine core noise with current and proposed aircraft noise certification requirements [PDF]
7th Aeroacoustics Conference, 1981 Predicted engine core noise levels for subsonic CTOL aircraft engines are compared with measured total aircraft noise levels and to current and proposed federal noise certification requirements. Comparisons are made at FAR-36 measuring stations and take into consideration both full and cutback power operations at takeoff.
U. VON GLAHN, D. GROESBECK
openaire +1 more source
Discrete PID-Type Iterative Learning Control for Mobile Robot
Journal of Control Science and Engineering, 2016 Through studying tracking problems of the wheeled mobile robot, this paper proposed a discrete iterative learning control approach based on PID with strong adaptability, fast convergence, and small error.
Hongbin Wang, Jian Dong, Yueling Wang
doaj +1 more source
An Analytical Assessment of NASA's N+1 Subsonic Fixed Wing Project Noise Goal [PDF]
The Subsonic Fixed Wing Project of NASA's Fundamental Aeronautics Program has adopted a noise reduction goal for new, subsonic, single-aisle, civil aircraft expected to replace current 737 and A320 airplanes.
Airplane Characteristics +17 more
core +3 more sources
Hybrid Electric Aircraft Propulsion Case Study for Skydiving Mission
Aerospace, 2017 This paper describes a case study for applying innovative architectures related to electrified propulsion for aircraft. Electric and hybrid electric propulsion for aircraft has gained widespread and significant attention over the past decade.
Richard Glassock +3 more
doaj +1 more source
Device-independent self-testing of unsharp measurements
New Journal of Physics, 2023 Semi-device-independent certification of an unsharp instrument has recently been demonstrated (2019 New J. Phys. 21 083034) based on the sequential sharing of quantum advantages in a prepare-measure communication game by assuming the system to be qubit ...
Prabuddha Roy, A K Pan
doaj +1 more source
Jixie chuandong, 2011 The overall design and functional implementation of gear drive test system is introduced,open power test-bed for the noise and vibration test and efficiency test of gear transmission is developed.By using dynamic analysis software and spectrum analysis ...
徐磊, 陈兵奎, 吴长鸿, 王振荣
doaj
Device-independent Shannon entropy certification
New Journal of PhysicsQuantum technologies promise information processing and communication technology advancements, including random number generation (RNG). Using Bell inequalities, a user of a quantum RNG hardware can certify that the values provided by an untrusted device
Robert Okula, Piotr Mironowicz
doaj +1 more source
A simulator study for the development and evaluation of operating procedures on a supersonic cruise research transport to minimize airport-community noise [PDF]
Piloted-simulator studies were conducted to determine takeoff and landing operating procedures for a supersonic cruise research transport concept that result in predicted noise levels which meet current Federal Aviation Administration (FAA) certification
Deal, P. L. +2 more
core +1 more source
Predicted airframe noise levels [PDF]
Calculated values of airframe noise levels corresponding to FAA noise certification conditions for six aircraft are presented. The aircraft are: DC-9-30; Boeing 727-200; A300-B2 Airbus; Lockheed L-1011; DC-10-10; and Boeing 747-200B.
Raney, J. P.
core +1 more source
Comparison of predicted engine core noise with proposed FAA helicopter noise certification requirements [PDF]
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representative helicopter engines are compared with measured total helicopter noise levels and proposed FAA helicopter noise certification requirements.
Groesbeck, D. E., Vonglahn, U.
core +1 more source