The paper presents a generalized composite noncertainty-equivalence adaptive control system for the of prototypical aeroelastic wing section using single trailing-edge surface. plunge–pitch (two-degree-of-freedom) dynamics this include torsional pitch-axis nonlinearity. open-loop exhibits limit cycle oscillations beyond critical free-stream velocity. It is assumed that parameters model are not ...

Aiming at the grid-connected problems of the double-fed induction generator (DFIG), this paper researches the control technology of the rotor excitation and the pitch angle and proposes a grid-connected DFIG joint optimization control strategy of the rotor excitation and the pitch angle based on the structure decentralized theory, and establishes the joint optimization model of the grid-connect...

24 ISSN 1729‐8806, pp. 25‐32 Research on Centroid Position for Stairs Climbing Stability of Search and Rescue Robot Yan Guo1,2, Aiguo Song1, Jiatong Bao1, Huatao Zhang1, and Hongru Tang3 1School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China 2Beckman Institute, University of Illinois at Urbana‐Champaign, Urbana 61801, Illinois, USA 3School of Energy and Pow...

A practical online optimization scheme is developed for performance optimization of an electrical aircraft propulsion system. The goal is to minimize the power extraction of the propulsion system for any given thrust value. The online optimizer computes the optimum pitch angle of a variable pitch propeller by minimizing the power of the system for a command thrust value. This algorithm is teste...

Pitch regulation plays a significant role in improving power performance and achieving output control wind turbines. The present study focuses on novel, pitch-regulated vertical axis turbine (VAWT) with inclined pitch axes. effect of two parameters (the fold angle the incline angle) instantaneous aerodynamic forces overall straight-bladed VAWT under tip-speed ratio 4 is investigated using an ac...

We investigate the acceleration and simultaneous radiative losses of electrons in the vicinity of relativistic shocks. Particles undergo pitch angle diffusion, gaining energy as they cross the shock by the Fermi mechanism and also emitting synchrotron radiation in the ambient magnetic field. A semi-analytic approach is developed which allows us to consider the behaviour of the shape of the spec...

I consider analytically particle acceleration at relativistic shocks, in the limit of pitch angle diffusion and large shock Lorentz factors. The derived energy spectrum index (k = (1 + √ 13)/2 ≈ 2.30), and particle pitch angle distribution at the shock are successfully compared with the results of numerical solutions. This totally analytic derivation is completely independent of the detailed de...

The optimization of the louver angle (θ) and the louver pitch (Lp) for a louver finned and tube heat exchanger was investigated numerically along with a simplified conjugate-gradient method (SCGM). The area reduction ratio relative to a plain surface is the objective function to be maximized. A search for the optimum louver angle (θ) and louver pitch (Lp), ranging from 15°< θ < 40° and 2 mm < L...

A novel technique for the real-time measurement of the magnetic field pitch angle in JET discharges using the motional Stark effect diagnostic is presented. Kalman filtering techniques are adopted to estimate the amplitude of the avalanche photodiode signals' harmonics that are relevant for the pitch angle calculation. The proposed technique {for extended technical details of the generic algori...

The magnetic energy and inductance of current distributions on the surface of a torus are considered. Specifically, we investigate the influence of the aspect ratio of the torus, and of the pitch angle for helical current densities, on the energy. We show that, for a fixed surface area of the torus, the energy experiences a minimum for a certain pitch angle. New analytical relationships are pre...