Results 71 to 80 of about 40,293 (167)

The pitch and the angle of pitch of a closed piece of ruled surface in R_1^3

International Mathematical Forum, 2007
Abstract It is well known that in the Euclidean space R3, the pitch and the angle of pitch on a ruled surface whose directrix curve is periodic can be given [6]. On the other hand, since there is no periodic timelike curve in the Minkowsky space R3 1, we give similar formulas on a closed piece of a ruled surface which is obtained by restricting the ...
openaire   +1 more source

Acceleration-difference-feedback-based decoupling with PID control strategy for active suppression of vehicle

Advances in Mechanical Engineering
This study addresses the issue of vertical-pitch dynamic coupling in active suspension systems caused by traditional velocity-feedback control. We introduce a novel ADF-PID control strategy that combines acceleration difference feedback (ADF) decoupling ...
Xiao-Peng Wang, Long Wu, Chi-Hsin Yang
doaj   +1 more source

Prediction Model for Shield Tunneling Roll Angle and Pitch Angle: A PCA-PSO-LGBM Approach

Applied Sciences
Accurately predicting shield roll angle and pitch angle based on different geological conditions and excavation parameters is significant for adjusting the shield’s posture in advance and ensuring safe excavation.
Peng Tang, Jinjian Hu, Tugen Feng, Hanwei Zhang, Jian Zhang, Yu Liang   +5 more
doaj   +1 more source

Particle Acceleration and Pitch-angle Evolution in Relativistic Turbulence

The Astrophysical Journal
Abstract Synchrotron radiation detected from relativistic astrophysical objects such as pulsar-wind nebulae and jets from active galactic nuclei depends on the magnetic fields and the distribution functions of energetic electrons in these systems.
Daniel Humphrey, Cristian Vega, Stanislav Boldyrev, Vadim Roytershteyn   +3 more
openaire   +2 more sources

Pitch-angle Focusing and Scattering of TeV Galactic Cosmic Rays Propagating in Local Interstellar Magnetic Fields

The Astrophysical Journal
We use Tibet AS γ anisotropy data for 4 TeV cosmic rays to investigate the properties of the pitch-angle focusing and diffusion caused by the interstellar magnetic field and turbulence.
N. D. Maalal, M. Zhang
doaj   +1 more source

Revisiting the pitch angle of the cutting edge of the plough-share to the furrow bottom

Сельскохозяйственные машины и технологии, 2015
Mold board soil cultivating is the most power-intensive operation in crop production. Decrease of power consumption of plowing by the plow body is possible in case of change of the pitch angle of the cutting edge to the furrow bottom. Thus cutting by the
S. I. Starovoytov, N. P. Starovoytova, N. N. Chemisov   +2 more
doaj  

Analysis of aerodynamic characteristics of helicopter biplane tailplane

Xibei Gongye Daxue Xuebao
To analyze the aerodynamic characteristics of helicopter biplane tailplane, computational models for helicopter biplane tailplane and monoplane tailplane were established via CFD.
SUN Huixun, SUN Pengpeng, YANG Yongfei, YUAN Mingchuan, FAN Feng, LIN Yongfeng   +5 more
doaj   +1 more source

Research on Centroid Position for Stairs Climbing Stability of Search and Rescue Robot

International Journal of Advanced Robotic Systems, 2011
This paper represents the relationship between the stability of stairs climbing and the centroid position of the search and rescue robot. The robot system is considered as a mass point-plane model and the kinematics features are analyzed to find the ...
Yan Guo, Aiguo Song, Jiatong Bao, Huatao Zhang, Hongru Tang   +4 more
doaj  

Instrumented Crutch Tip for Monitoring Force and Crutch Pitch Angle. [PDF]

Sensors (Basel), 2019
Sesar I, Zubizarreta A, Cabanes I, Portillo E, Torres-Unda J, Rodriguez-Larrad A.   +5 more
europepmc   +1 more source

Multi-Layer Artificial Neural Networks Based MPPT-Pitch Angle Control of a Tidal Stream Generator. [PDF]

Sensors (Basel), 2018
Ghefiri K, Bouallègue S, Garrido I, Garrido AJ, Haggège J.   +4 more
europepmc   +1 more source