Kinematic Analysis and Synthesis Type III Movable Spatial 6R Mechanism With Three Adjacent Parallel Axes

1992 ◽  
Author(s):  
Chung-Ching Lee ◽  
Hong-Sen Yan
Keyword(s):  
Computer Animation ◽  
Kinematic Analysis ◽  
Special Form ◽  
Matrix Algebra ◽  
Landing Gear ◽  
Type Ii ◽  
Kinematic Synthesis ◽  
Aircraft Landing ◽  
Analysis And Synthesis ◽  
Gear Mechanism

Abstract Based on matrix algebra, we derive the general analytical kinematic solutions of Type II movable spatial 6R mechanism with three adjacent parallel axes. This 6R mechanism was previously identified by the authors, and one of its special form is proposed as the retracting and wheel twisting mechanism for aircraft landing gears. A graphical synthesis technique by descriptive geometry is presented for the kinematic synthesis of the landing gear mechanism. A numerical example is given, and the mobility of this design is verified by computer animation of motions.

SDAMP: Software for the Design and Analysis of Mechanical Presses

2000 ◽  
Author(s):  
Herbert E. Stumph ◽  
Andrew P. Murray
Keyword(s):  
Kinematic Analysis ◽  
Kinematic Synthesis ◽  
Link Mechanism ◽  
Mechanical Press ◽  
Analysis And Synthesis ◽  
Drag Link ◽  
Mechanism Kinematic ◽  
Functioning Mechanism

Abstract In this paper we introduce the MATLAB-based SDAMP (pronounced stamp) software for the analysis and synthesis of several mechanical press linkages. These linkages include the slider-crank and the four six-bar mechanisms formed by attaching a drag-link, crank-rocker, crank-shaper or Whitworth mechanism to a slider-crank. SDAMP performs four basic tasks: guided layout, kinematic analysis, mechanism refine and kinematic synthesis. Guided layout leads the user through joint selection to ensure a functioning mechanism. Kinematic analysis displays the position, velocity, acceleration and jerk of the sliding output versus the rotation of the input link. Mechanism refine allows the user to vary the geometry of an existing mechanism towards the goal of achieving a desired kinematic analysis. Lastly, kinematic synthesis determines the set of defect-free slider-cranks capable of achieving four precision points. All of these capabilities are integrated through a host of GUI driven MATLAB files in SDAMP.

On the Analysis and Synthesis of Type I Spatial 6R Overconstrained Mechanism

1994 ◽  
Author(s):  
Chung-Ching Lee
Keyword(s):  
Computer Animation ◽  
Matrix Algebra ◽  
Optimization Method ◽  
Type I ◽  
Numerical Examples ◽  
Synthesis Technique ◽  
Straight Line ◽  
Analysis And Synthesis ◽  
Clamping Device ◽  
Straight Line Mechanism

Abstract Based on matrix algebra and its differentiation, we derive the general analytical kinematic solutions and simple stationary configurations of Type I spatial 6R overconstrained mechanism. This mechanism is a general form of Sarrus 6R mechanism. Its coupler point of a certain link has straight-line motion and this is used for the synthesis of straight-line mechanism by the optimization method. Moreover, a graphical synthesis technique with descriptive geometry is presented to design the linkage type of double-toggle mechanism for spatial clamping device. Two numerical examples are given for illustration and their results are verified by computer animation of motion.

Kinematic Analysis and Synthesis of Geneva Mechanism Combined with Elliptic Gear

2011 ◽  
Vol 308-310 ◽  
pp. 405-410
Author(s):  
Ji Guang Han
Keyword(s):  
Kinematic Analysis ◽  
Constant Velocity ◽  
Synthesis Method ◽  
Kinematic Characteristic ◽  
Calculation Methods ◽  
Kinematic Range ◽  
Analysis And Synthesis ◽  
Variable Transmission ◽  
Gear Mechanism ◽  
Kinematic Coefficient

When the slot number of geneva is fixed, the kinematic coefficient of common geneva mechanism is a fixed value, too. Using the elliptic gear mechanism as the drive crank of the Geneva, the variable transmission ratio of the elliptic gear mechanism is utilized, which makes the kinematic characteristic of the geneva mechanism changed. A synthesis method of combined geneva mechanism is put forward according to the kinematic coefficients in this paper. The calculation methods of the maximum and minimum kinematic coefficient are proposed. The parameters of the combined geneva mechanism are presented, which the middle position of the kinematic range of the geneva has approximate constant velocity characteristics.

scholarly journals Analysis of Links Positions in Landing Gear Mechanism

2014 ◽  
Vol 19 (3) ◽  
pp. 503-512
Author(s):  
D. Brewczyński ◽  
G. Tora
Keyword(s):  
Kinematic Analysis ◽  
Shock Absorber ◽  
Angular Position ◽  
Hydraulic Cylinder ◽  
Landing Gear ◽  
The Third ◽  
Cylinder Length ◽  
Gear Mechanism ◽  
Lift Off ◽  
Unit Vectors

Abstract This article contains a kinematic analysis of an aircraft chassis mechanism in a range of positions. The mechanism of the chassis is made up of several smaller subsystems with different functions. The first mechanism is used to eject the chassis before landing (touchdown) and fold it to hatchway after the lift off. The second mechanism is designed to perform rotation of the crossover with the wheel, in order to adjust the position of the wheel to fit it in the limited space in the hold. The third mechanism allows movement of the chassis resulting from the change in length of the damper. To determine the position of the following links of the mechanism calculus of vectors was applied in which unit vectors were used to represent the angular position of the links. The aim of the analysis is to determine the angle of convergence and the angle of heel wheels as a function of the variable length of hydraulic cylinder, length of the shock absorber, length of the regulations rods

scholarly journals Numerical Continuation Analysis of a Dual-sidestay Main Landing Gear Mechanism

2012 ◽  
Author(s):  
James Knowles ◽  
Bernd Krauskopf ◽  
Mark Lowenberg ◽  
Simon Neild ◽  
P. Thota
Keyword(s):  
Landing Gear ◽  
Numerical Continuation ◽  
Gear Mechanism

scholarly journals 1002 Aerodynamic noise reduction for aircraft landing gear

2009 ◽  
Vol 2009 (0) ◽  
pp. 321-322
Author(s):  
Kazuhide Isotani ◽  
Kenji Hayama ◽  
Akio Ochi ◽  
Toshiyuki Kumada
Keyword(s):  
Noise Reduction ◽  
Landing Gear ◽  
Aerodynamic Noise ◽  
Aircraft Landing ◽  
Aircraft Landing Gear
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