直升机飞行力学 Helicopter dynamics chapter 4
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This document provides an introduction to helicopter flight dynamics, including:
- Definitions of helicopter flight dynamics, characteristics of helicopter flight, and scopes and methodologies used.
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- Transformations between different coordinate systems.
- Angles used to describe helicopter orientation and motion, including Euler angles.
- Prerequisites, syllabus, and references for further study are also included.
直升机飞行力学 Helicopter dynamics chapter 3
The document discusses rotor flapping motion in helicopters. It covers three key topics:
1) The equation of rotor flapping motion and three origins of flapping motion: forward speed, controls, and angular velocity.
2) Factors that affect flapping motion, including hinge offset, hub moments, and whether the rotor is hinged or hingeless.
3) How the pilot controls the helicopter through inducing flapping motion by changing blade pitch via the controls.
直升机飞行力学 Helicopter dynamics chapter 2
The document summarizes helicopter flight controllers, including the external forces acting on helicopters, different control manners, and the development of helicopter controllers. It describes the aerodynamic forces on the main rotor, tail rotor, fuselage, horizontal and vertical tails. It then explains the control manners of helicopters with main and tail rotors, twin rotor helicopters, and tilt-rotor aircraft. Finally, it discusses early direct control methods and the progression to modern fly-by-wire and fly-by-light control systems.
直升机飞行力学 Helicopter dynamics chapter 6
The document discusses various methods for modeling and analyzing 3D incompressible flows, including:
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2. The vortex lattice method for numerically solving lifting surface theory using a discrete number of horseshoe vortices on the wing.
3. Modeling a 3D source/sink and doublet and using them to represent flow over a sphere.
4. General panel methods which cover a 3D body with source/vortex panels and apply flow tangency to solve for the unknown flow distributions. Challenges include properly distributing panels over complex geometries.
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This document provides an introduction to helicopter flight dynamics, including:
- Definitions of helicopter flight dynamics, characteristics of helicopter flight, and scopes and methodologies used.
- Coordinate systems used including gravity, body, wind, and hub axes.
- Transformations between different coordinate systems.
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The document discusses rotor flapping motion in helicopters. It covers three key topics:
1) The equation of rotor flapping motion and three origins of flapping motion: forward speed, controls, and angular velocity.
2) Factors that affect flapping motion, including hinge offset, hub moments, and whether the rotor is hinged or hingeless.
3) How the pilot controls the helicopter through inducing flapping motion by changing blade pitch via the controls.
直升机飞行力学 Helicopter dynamics chapter 2
The document summarizes helicopter flight controllers, including the external forces acting on helicopters, different control manners, and the development of helicopter controllers. It describes the aerodynamic forces on the main rotor, tail rotor, fuselage, horizontal and vertical tails. It then explains the control manners of helicopters with main and tail rotors, twin rotor helicopters, and tilt-rotor aircraft. Finally, it discusses early direct control methods and the progression to modern fly-by-wire and fly-by-light control systems.
直升机飞行力学 Helicopter dynamics chapter 6
The document discusses various methods for modeling and analyzing 3D incompressible flows, including:
1. Lifting surface theory which extends lifting line theory to model low aspect ratio wings by placing multiple lifting lines on the wing.
2. The vortex lattice method for numerically solving lifting surface theory using a discrete number of horseshoe vortices on the wing.
3. Modeling a 3D source/sink and doublet and using them to represent flow over a sphere.
4. General panel methods which cover a 3D body with source/vortex panels and apply flow tangency to solve for the unknown flow distributions. Challenges include properly distributing panels over complex geometries.
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When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
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In this session, we shall introduce you to the world of automation, the UiPath Platform, and guide you on how to install and setup UiPath Studio on your Windows PC.
📕 Detailed agenda:
What is RPA? Benefits of RPA?
RPA Applications
The UiPath End-to-End Automation Platform
UiPath Studio CE Installation and Setup
💻 Extra training through UiPath Academy:
Introduction to Automation
UiPath Business Automation Platform
Explore automation development with UiPath Studio
👉 Register here for our upcoming Session 2 on June 20: Introduction to UiPath Studio Fundamentals: https://community.uipath.com/events/details/uipath-lagos-presents-session-2-introduction-to-uipath-studio-fundamentals/
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AI Trends in Creative Operations 2024 by Artwork Flow.pdf
Creative operations teams expect increased AI use in 2024. Currently, over half of tasks are not AI-enabled, but this is expected to decrease in the coming year. ChatGPT is the most popular AI tool currently. Business leaders are more actively exploring AI benefits than individual contributors. Most respondents do not believe AI will impact workforce size in 2024. However, some inhibitions still exist around AI accuracy and lack of understanding. Creatives primarily want to use AI to save time on mundane tasks and boost productivity.
Skeleton Culture Code
Organizational culture includes values, norms, systems, symbols, language, assumptions, beliefs, and habits that influence employee behaviors and how people interpret those behaviors. It is important because culture can help or hinder a company's success. Some key aspects of Netflix's culture that help it achieve results include hiring smartly so every position has stars, focusing on attitude over just aptitude, and having a strict policy against peacocks, whiners, and jerks.
PEPSICO Presentation to CAGNY Conference Feb 2024
PepsiCo provided a safe harbor statement noting that any forward-looking statements are based on currently available information and are subject to risks and uncertainties. It also provided information on non-GAAP measures and directing readers to its website for disclosure and reconciliation. The document then discussed PepsiCo's business overview, including that it is a global beverage and convenient food company with iconic brands, $91 billion in net revenue in 2023, and nearly $14 billion in core operating profit. It operates through a divisional structure with a focus on local consumers.
Content Methodology: A Best Practices Report (Webinar)
This document provides an overview of content methodology best practices. It defines content methodology as establishing objectives, KPIs, and a culture of continuous learning and iteration. An effective methodology focuses on connecting with audiences, creating optimal content, and optimizing processes. It also discusses why a methodology is needed due to the competitive landscape, proliferation of channels, and opportunities for improvement. Components of an effective methodology include defining objectives and KPIs, audience analysis, identifying opportunities, and evaluating resources. The document concludes with recommendations around creating a content plan, testing and optimizing content over 90 days.
How to Prepare For a Successful Job Search for 2024
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Social Media Marketing Trends 2024 // The Global Indie Insights
A report by thenetworkone and Kurio.
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The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
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5 Public speaking tips from TED - Visualized summary
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
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Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
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Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
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The six step guide to practical project management
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If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
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During this webinar, Anand Bagmar demonstrates how AI tools such as ChatGPT can be applied to various stages of the software development life cycle (SDLC) using an eCommerce application case study. Find the on-demand recording and more info at https://applitools.info/b59
Key takeaways:
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• Understand the limitations of the technology and where human expertise is crucial
• Gain insight into different AI-based tools
• Adopt AI-based tools to stay relevant and optimize work for developers and testers
* ChatGPT and OpenAI belong to OpenAI, L.L.C.
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More than Just Lines on a Map: Best Practices for U.S Bike Routes
More than Just Lines on a Map: Best Practices for U.S Bike RoutesProject for Public Spaces & National Center for Biking and Walking
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This session highlights best practices and lessons learned for U.S. Bike Route System designation, as well as how and why these routes should be integrated into bicycle planning at the local and regional level.
Presenters:
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直升机飞行力学 Helicopter dynamics chapter 4
- 1. Helicopter Flight Dynamics Chapter 3: Helicopter Motion Equations
- 3. Helicopter Motion Equations Longitudinal Motion is the summation of aerodynamic forces along the x axis. The three items in the right side are equivalent to ma . The first item comes from the acceleration, while the last two items are the inertial accelerations produced by the helicopter curve motions.
- 4. Helicopter Motion Equations For the pitching motion, we have: The lift side is the summation of aerodynamic moments . In the right side , the first item is the inertial moment caused by angular acceleration, the second item is the gyro moment, and the third item is effect of centripetal force. Lateral/yaw Motion
- 5. Helicopter Motion Equations The Relationship Between Angular Motions The attitude angles are respect to gravity axes. While the angular velocities are measured in body axes. The 6 equations of helicopter body and 3 angular motion equations consists of the governing equations of helicopter flight dynamics. The relationship between angular velocities and helicopter attitudes rates can be written as: Z D Z 1 Y 1 X 1