Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Coaxial double-rotor unmanned helicopter modeling method based on optical cable laying

An unmanned helicopter and coaxial dual-rotor technology, applied in the aviation field, can solve problems such as complex modeling methods

Active Publication Date: 2015-04-08
SHENZHEN MINGXIN AVIATION TECH
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coaxial twin-rotor unmanned helicopter is very suitable for the rapid laying of flexible cables such as optical cables due to its unique layout. The influence of the drag-type flexible optical cable on the dynamic characteristics of the aircraft, so its modeling method is more complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coaxial double-rotor unmanned helicopter modeling method based on optical cable laying
  • Coaxial double-rotor unmanned helicopter modeling method based on optical cable laying
  • Coaxial double-rotor unmanned helicopter modeling method based on optical cable laying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] Example 1: Dynamic modeling method of flexible optical cable under constant tension release state

[0130] Since one end of the optical cable is fixed on the helicopter platform and the other end is a free end, the optical cable is released under the control of the constant tension release device under the condition that the tension of the optical cable is constant. Therefore, when we analyze the force of the optical cable, one end of the optical cable can be considered as a fixed end, and the fixed end is stationary or moving at a constant speed. At the same time, in order to use the multi-rigid body system dynamics method to describe the motion of the optical cable, set:

[0131] e) The entire optical cable to be laid is composed of N optical cable segments;

[0132] f) Each segment is released from the release mechanism one by one, and the speed of the cable segment being released is consistent with the speed of the cable segment just released;

[0133] g) Each fib...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed is a coaxial double-rotor unmanned helicopter modeling method based on optical cable laying. The method comprises flexible optical cable dynamics modeling at a constant tension release state and an optical cable laying unmanned helicopter dynamics model for a flight control system. The flexible optical cable dynamics modeling at the constant tension release state comprises stress calculating method of a single optical cable segment and a whole optical cable dynamics model establish method. The optical cable laying unmanned helicopter dynamics model for the flight control system comprises an unmanned helicopter platform dynamics model and an unmanned helicopter parameter identification test system, and it is set that: a), a whole optical cable to be laid is composed of N optical cable segments; b), each segment is sequentially released from a release mechanism, and the speed of the currently releasing optical cable segment is consistent with the speed of the just released optical cable segment; c), each optical cable segment is taken as a rigid rod, and the mass is concentrated at one end point of each optical cable segment; and d), the rigid rods are connected through twists. The coaxial double-rotor unmanned helicopter modeling method provided by the invention provides support for development of the flight control system of an unmanned helicopter.

Description

technical field [0001] The invention relates to a parameter identification test system for laying a flexible optical cable for a coaxial double-rotor unmanned helicopter, which belongs to the field of aviation technology. Background technique [0002] Because of its convenient take-off and landing, fixed-point hovering, and strong maneuverability, unmanned helicopters have a wide range of combat uses and have very considerable combat potential and development prospects. The countries that carried out the development of unmanned helicopters abroad include the United States, the United Kingdom, Canada, and Germany. Among them, the United States began to study unmanned helicopters in the 1950s. In the 1960s, the QH-50A anti-submarine remote control helicopter was successfully tested. During the Vietnam War, the US Army used the QH-50D unmanned helicopter to perform tasks such as reconnaissance, battlefield surveillance, and artillery target observation. Due to the many difficu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G05B17/02
Inventor 不公告发明人
Owner SHENZHEN MINGXIN AVIATION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com