Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

273
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
273
Time and frequency -Domain Interpretation of PI Control01:27

Time and frequency -Domain Interpretation of PI Control

124
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
124
Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

109
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
109
Load-frequency control01:28

Load-frequency control

162
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
162
Two-Dimensional Force System: Problem Solving01:29

Two-Dimensional Force System: Problem Solving

571
Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
The first step to solving a two-dimensional force system problem is to draw a free-body diagram of the object under consideration. This diagram helps identify all the external forces acting on the object, including their...
571
Rotation with Constant Angular Acceleration - I01:37

Rotation with Constant Angular Acceleration - I

6.7K
If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...
6.7K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Safety boundary protection control for distributed propulsion vehicle operating in plateau environment.

Scientific reports·2026
Same author

Corrigendum to "Intestine versus liver? Uncovering the hidden major metabolic organs of silybin in rats" [Drug Metabolism and Disposition 53 (2025) 100005].

Drug metabolism and disposition: the biological fate of chemicals·2026
Same author

PERK inhibition attenuates multi-program cell death through Nrf2/HO-1 activation in diabetic retinopathy with integrated proteomics and functional validation in HRECs.

Scientific reports·2026
Same author

Multi-omics integrated analysis identifies causal risk factors and therapeutic targets for diabetic retinopathy.

Journal of translational medicine·2025
Same author

The Features of Vessel Densities and Hemorheological Parameters in Patients With Central Retinal Vein Occlusion: A Prospective Randomized Case-Control Study.

Journal of ophthalmology·2025
Same author

Tectorigenin attenuates myocardial damage by doxorubicin-induced ferroptosis by activating the p62-Keap1-Nrf2/HO-1/GPX4 axis.

Journal of traditional and complementary medicine·2025

相关实验视频

Updated: Jul 1, 2025

Eye Tracking During A Complex Aviation Task For Insights Into Information Processing
07:48

Eye Tracking During A Complex Aviation Task For Insights Into Information Processing

Published on: April 4, 2025

262

对于考虑动态结冰过程的飞机,固定时间攻击角度受限控制.

Zehong Dong1, Xingya Da2, Yinghui Li3

  • 1China Aerodynamics Research and Development Center, High Speed Aerodynamics Institute, Mianyang, 621000, China.

Scientific reports
|March 4, 2024
PubMed
概括

飞机的结冰会降低性能,需要快速稳定. 这项研究引入了一种新的固定时间控制策略,该策略考虑了动态结冰过程和攻击角度的约束,提高了在结冰事件期间的飞机安全.

更多相关视频

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.7K
Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.6K

相关实验视频

Last Updated: Jul 1, 2025

Eye Tracking During A Complex Aviation Task For Insights Into Information Processing
07:48

Eye Tracking During A Complex Aviation Task For Insights Into Information Processing

Published on: April 4, 2025

262
Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.7K
Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.6K

科学领域:

  • 航空航天工程 航空航天工程
  • 控制系统 控制系统
  • 流体动力学 流体动力学

背景情况:

  • 飞机结冰显著降低了空气动力学性能,并减少了失速攻击角度.
  • 现有的控制方法通常假定瞬间结冰,未能解决冰积累的动态性质.
  • 在冰化过程中稳定飞机需要快速收跟踪错误.

研究的目的:

  • 为经历动态结冰的飞机制定固定时间角度的攻击受约束控制策略.
  • 为了研究动态结冰对空气动力学系数的影响.
  • 提出一种基于深度神经网络的方法,用于在结冰条件下预测攻击的失速角度.

主要方法:

  • 进行了冰风洞实验,以分析空气动力学系数变化与攻击角度和结冰强度的变化.
  • 采用一个合适的方法来确定空气动力系数和结冰参数之间的关系.
  • 开发了一个深度神经网络,用于实时确定攻击的失速角度.
  • 设计了一种固定时间收,攻击角度受约束的强大控制方法.

主要成果:

  • 通过风洞实验来描述气体的动态结冰过程.
  • 量化了提升,阻力,投时刻系数,攻击角度和结冰强度之间的关系.
  • 证明了深度神经网络在预测失速攻击角度方面的有效性.
  • 模拟结果验证了拟议的强有力的控制策略的性能.

结论:

  • 开发的固定时间控制策略有效地管理动态飞机结冰期间的攻击角度限制.
  • 该研究提供了对结冰过程中的空气动力学变化的全面了解,并为机条件提供了预测工具.
  • 拟议的方法在动态结冰的情况下提高了飞机的稳定性和安全性.