Modeling method for soft-landing buffer mechanism of lander with legs
A technology of buffer mechanism and modeling method, which is applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as high efficiency, poor numerical accuracy, and small calculation time consumption, and achieve the effect of improving calculation efficiency
Inactive Publication Date: 2015-02-25
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to solve the problems of poor numerical accuracy, etc., and provide a modeling method for the landing buffer mechanism of a legged lander, which can well reflect the mechanical characteristics of the buffer legs, and at the same time consider the influence of the flexibility of the structure, and the calculation time is small and convenient. efficient
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0027] Step 1. Cushion landing leg configuration establishment
[0028] The geometric model is established according to the geometric characteristic parameters of the inner and outer cylinders, and the structure diagram of the cushioning landing legs is shown in figure 1 shown. Geometric parameters include: the length l of the inner cylinder in =875mm, the outer radius R of the inner cylinder in =49mm, inner cylinder wall thickness h in =2.5mm, the length of the outer cylinder l out =1424mm, the outer radius R of the outer cylinder out =52.5mm, outer cylinder wall thickness h out = 2.5mm and the total length l of the inner cylinder installed in the outer cylinder w =1880mm.
[0029] The inner and outer cylinders are simulated by shell elements, and the inner and outer cylinders are endowed with their own section properties, and the inner and outer cyl...
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
Login to View More Abstract
The invention relates to a modeling method for a soft-landing buffer mechanism of a lander with legs and belongs to the technical field of planet landers with the legs. The method disclosed by the invention comprises the following steps: firstly, establishing buffer landing leg configuration; then, establishing an aluminum honeycomb material equivalent model, equivalently converting a stress-strain relationship into a load stroke relationship between inner barrels and outer barrels, and simulating the load stroke relationship by adopting a linkage unit; finally, establishing the linking relation of buffer landing legs. The modeling method has the advantages that finite element modeling is adopted, and the influence of structural flexibility to response is fully considered; the interaction of the flexibility of the buffer landing legs to the inner barrels and the outer barrels of the landing legs is considered; by simplified modeling of aluminum honeycomb mechanical property, the computational efficiency is effectively improved on the premise that the accuracy is ensured.
Description
technical field [0001] The invention relates to a modeling method for a landing buffer mechanism of a legged lander, belonging to the technical field of legged planetary landers. Background technique [0002] Legged landers usually use disposable buffers, which have many advantages such as high reliability, simple structure, and light weight, and are widely used in the field of planetary exploration. The lunar exploration project carried out in our country uses legged landers, and the dynamics simulation of legged landers has great guiding significance for the design of landers; and a key technology of dynamics simulation modeling of legged landers is to Rational modeling of cushioned landing legs. [0003] The traditional cushioning landing leg modeling is based on the multi-rigid body dynamic model, which is relatively simple and has high calculation efficiency, but it fails to consider the flexibility of the structure, and cannot accurately reflect the impact of flexibil...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 刘莉陈树霖周思达董威利杨武张南富
Owner BEIJING INSTITUTE OF TECHNOLOGYGY