CN-122009539-A - Counterweight structure with adjustable triaxial moment of inertia and design method

CN122009539ACN 122009539 ACN122009539 ACN 122009539ACN-122009539-A

Abstract

The invention relates to a counterweight structure with adjustable triaxial moment of inertia and a design method, belongs to the technical field of spacecraft structures, and solves the problems that a counterweight simulation piece is a fixed value and is only suitable for single project requirements in the prior art. The invention comprises balancing weights, connecting pieces and an adapter, wherein the balancing weights are of a cuboid structure, 8 blocks are distributed in a2 multiplied by 2 array mode, the connecting pieces are used for fixing the 8 balancing weights together to form an assembly, the adapter is suitable for fixing the assembly on a bearing cylinder, the mass centers of the balancing weights are the geometric centers of the balancing weights, the mass centers of the assembly are the geometric centers of the assembly, the mass centers of the 8 balancing weights form a cuboid taking the mass centers of the assembly as the center, and meanwhile, the position of the mass center of each balancing weight relative to the mass center of the assembly is adjustable. The invention adopts modularized symmetrical design, takes array space as a regulating and controlling means for inertia regulation, and realizes the rapid regulation of the triaxial moment of inertia of the counterweight structure.

Inventors

ZHAO YUCHEN
LIU QINGXU
HU XUERUI
MA JUN
CUI GUANGZHI
FENG SHUANG

Assignees

北京机械设备研究所

Dates

Publication Date: 20260512
Application Date: 20241111

Claims (10)

1. The counterweight structure with the adjustable triaxial moment of inertia is characterized by comprising a counterweight block, a connecting piece and an adapter, wherein the counterweight block is of a cuboid structure, 8 counterweight blocks are distributed in a 2X 2 array mode, the connecting piece is used for fixing the 8 counterweight blocks together to form an assembly body, the adapter is used for fixing the assembly body on a bearing cylinder, the mass center of the counterweight block is the geometric center of the counterweight block, the mass center of the assembly body is the geometric center of the assembly body, the mass centers of the 8 counterweight blocks form a cuboid taking the mass center of the assembly body as the center, and meanwhile, the position of each mass center of the counterweight block relative to the mass center of the assembly body is adjustable.
2. A triaxial moment of inertia adjustable counterweight structure according to claim 1, wherein the counterweight is made of aluminium alloy or stainless steel or lead.
3. The adjustable triaxial moment of inertia counterweight structure according to claim 1, wherein a plurality of threaded holes are respectively provided in the middle of three adjacent surfaces of the counterweight.
4. A triaxial moment of inertia adjustable counterweight structure according to any one of claims 1 to 3, wherein the connecting member is an elongated flat plate, and a waist-shaped hole extending in a longitudinal direction is provided in a center portion thereof.
5. The weight structure with adjustable triaxial moment of inertia according to claim 4, wherein the side edges of the waist-shaped hole on the connecting member are provided with length marks, the length marks extend to both sides in the length direction of the connecting member with the center of the connecting member as an origin.
6. The adjustable triaxial moment of inertia counterweight structure according to claim 4, wherein the waist-shaped holes on the connecting member have anti-slip regions on both side surfaces thereof, the anti-slip regions having a roughness greater than other regions.
7. The adjustable triaxial moment of inertia counterweight structure according to claim 1, wherein the adapter includes a first mounting portion adapted to be connected with a socket, a second mounting portion for connection with the counterweight, and a connecting portion for connecting the first and second mounting portions.
8. The adjustable triaxial moment of inertia counterweight structure according to claim 7, wherein the first mounting portion, the connecting portion, and the second mounting portion are sequentially connected to form a "zig-zag" shape.
9. The triaxial moment of inertia adjustable counterweight structure according to claim 8, wherein the adapter further includes a stiffener.
10. A method of designing a triaxial moment of inertia adjustable counterweight structure for designing a triaxial moment of inertia adjustable counterweight structure according to any one of claims 1-9.

Description

Counterweight structure with adjustable triaxial moment of inertia and design method Technical Field The invention relates to the technical field of space vehicle structures, in particular to a counterweight structure with adjustable triaxial moment of inertia and a design method. Background In the ground simulation separation test of a spacecraft, in order to make the test state more approximate to actual, test data are more accurate and more convincing, and the quality characteristics of a simulation platform are required. Mass characteristics mainly include mass, centroid and inertia. Wherein the mass and centroid are obtained quickly by the size and position of the simulator, while the inertia is difficult to simulate. Even if a structure satisfying the inertia requirement is obtained by continuously adjusting parameters, once the platform characteristics are changed, higher cost is required for repairing or redesigning the produced structure. Therefore, in order to meet the diversified demands of future spacecraft, it is necessary to develop a weight design method with adjustable inertia. The biggest difficulty of the current platform simulation counter weight design method for realizing triaxial moment of inertia adjustment is that moment of inertia in three directions has a coupling relation, and each time the moment of inertia in two directions can be changed at least by an adjustment structure, a simple structure meeting the requirement of triaxial moment of inertia simultaneously is difficult to obtain, and repeated debugging and calculation are needed. In the prior art, the single-axis or double-axis moment of inertia is adjusted, the implementation difficulty is greatly reduced, the counterweight structure with the adjustable triaxial moment of inertia and the design method are rarely reported, and the device obtained by the existing platform moment of inertia design method has a complex structure and is difficult to popularize in triaxial conditions. This patent provides a counter weight structure and design method with adjustable triaxial moment of inertia to above difficulty, adopts modular structure, and the part type is few, and mechanism form is simple, and application scope is wide, but the triaxial moment of inertia of quick design balancing weight. Meanwhile, the interface design freedom degree is high, and the requirements of different platform simulators can be met by rapidly replacing an adapter structure or increasing and decreasing the weight of a balancing weight. Disclosure of Invention In view of the above analysis, the present invention provides a weight structure with adjustable triaxial moment of inertia and a design method thereof, which are used for solving the problems that the weight simulation element is a fixed value and is only suitable for single project requirements. The invention provides a counterweight structure with adjustable triaxial moment of inertia, which comprises a counterweight block, a connecting piece and an adapter, wherein the counterweight block is of a cuboid structure, 8 blocks are distributed in a 2X 2 array mode, the connecting piece is used for fixing 8 counterweight blocks together to form an assembly body, the adapter is used for fixing the assembly body on a bearing cylinder, the mass center of the counterweight block is the geometric center of the counterweight block, the mass center of the assembly body is the geometric center of the assembly body, the mass centers of the 8 counterweight blocks form a cuboid taking the mass center of the assembly body as the center, and meanwhile, the position of the mass center of each counterweight block relative to the mass center of the assembly body is adjustable. Further, the balancing weight is made of aluminum alloy or stainless steel or lead. Further, a plurality of threaded holes are respectively formed in the middle of the three adjacent surfaces of the balancing weight. Further, the connecting piece is a strip-shaped flat plate, and the middle part of the connecting piece is provided with a waist-shaped hole extending along the length direction. Further, length marks are arranged on the side edges of the waist-shaped holes on the connecting piece, the length marks take the center of the connecting piece as an origin, and extend to two sides along the length direction of the connecting piece. Further, the two side surfaces of the waist-shaped hole on the connecting piece are provided with anti-skid areas, and the roughness of the anti-skid areas is larger than that of other areas. Further, the adapter comprises a first installation part, a second installation part and a connecting part, wherein the first installation part is used for being connected with the bearing cylinder, the second installation part is used for being connected with the balancing weight, and the connecting part is used for connecting the first installation part and the second installation part. Further, the first mounting par