CN106706245A - Vibration-acceleration coupling environment test system used for spacecraft dynamic test - Google Patents
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Abstract
本发明公开了一种用于航天器动力学试验的振动-加速度耦合环境试验系统，包括加速度环境试验系统和振动环境试验系统，其中，加速度环境试验系统用于通过转臂旋转，来提供恒定线加速度环境应力，主要包括机座、电动机、传动系统、测速装置、工作转臂、集流环，电控系统；振动环境试验系统用于提供振动激励，主要包括电磁振动台台体、强制空气冷却系统和摄像系统，电磁振动台、强制空气冷却系统和摄像系统通过螺栓连接固定在离心机转臂上。本发明的环境试验系统具有结构简单、易于操控的优点，可用于向航天产品提供振动-加速度耦合动力学试验。
The invention discloses a vibration-acceleration coupling environment test system for spacecraft dynamics test, which includes an acceleration environment test system and a vibration environment test system, wherein the acceleration environment test system is used to provide a constant line by rotating a rotating arm Acceleration environmental stress, mainly including machine base, motor, transmission system, speed measuring device, working arm, collector ring, electric control system; vibration environment test system is used to provide vibration excitation, mainly including electromagnetic vibration table body, forced air cooling System and camera system, electromagnetic vibrating table, forced air cooling system and camera system are fixed on the centrifuge arm by bolt connection. The environmental test system of the invention has the advantages of simple structure and easy manipulation, and can be used to provide vibration-acceleration coupled dynamic tests for aerospace products.
Description
技术领域technical field
本发明属于航天器动力学试验技术领域，具体来说，本发明涉及一种振动-加速度耦合环境试验设备。The invention belongs to the technical field of spacecraft dynamics test, in particular, the invention relates to a vibration-acceleration coupled environmental test equipment.
背景技术Background technique
在国防工业中，航空航天产品普遍工作于振动和线加速度同时作用的耦合动态环境中，如航天器在发射阶段时，飞机在爬升、俯冲和盘旋时，战略导弹在主动段和通过再入段时，其设备和装置均受到加速度过载和发动机振动的耦合作用。但在目前的力学环境试验方面，由于耦合试验设备的缺失，振动试验和离心试验一般分时独立进行，分别在振动台上和离心机上考核产品对振动或线加速度单项应力的耐受能力。这与工程实际中振动和线加速度同时耦合作用的情况存在差异。美国桑地亚(Sandia)国家实验室的初步研究结论已经表明，加速度过载环境与振动环境的综合影响并不等于各因素的分别影响之和，在两种或多种环境应力的综合作用下产品会暴露出在单项应力试验中未发现的问题，因此用独立的试验手段不能预测复合环境影响下设备的可靠性。美军标810和国军标150A也均明确指出：“综合环境试验可能比一系列连续的单个试验更能代表实际环境效应。使用环境中遇到这些条件时，鼓励进行综合环境试验”。可以预见，在航空航天发展的新阶段，仪器设备将更加复杂和先进，对环境的敏感性将进一步增强，多应力耦合作用效应对产品任务可靠性的影响将进一步凸显。In the national defense industry, aerospace products generally work in a coupled dynamic environment where vibration and linear acceleration act simultaneously, such as when a spacecraft is in the launch phase, when an aircraft is climbing, diving, and circling, when a strategic missile is in the active section and through the reentry section At the same time, its equipment and devices are subject to the coupling effect of acceleration overload and engine vibration. However, in the current mechanical environment test, due to the lack of coupling test equipment, the vibration test and the centrifugal test are generally carried out separately in time, and the product's tolerance to vibration or linear acceleration single stress is assessed on the vibration table and the centrifuge respectively. This is different from the simultaneous coupling of vibration and linear acceleration in engineering practice. The preliminary research conclusions of the Sandia National Laboratory in the United States have shown that the combined influence of the acceleration overload environment and the vibration environment is not equal to the sum of the respective influences of each factor. Under the combined effects of two or more environmental stresses, the product It will expose problems that are not found in the single stress test, so the reliability of the equipment under the influence of the combined environment cannot be predicted by independent test methods. Both the U.S. military standard 810 and the national military standard 150A also clearly state: "Comprehensive environmental tests may be more representative of actual environmental effects than a series of continuous individual tests. When these conditions are encountered in the use environment, comprehensive environmental tests are encouraged." It is foreseeable that in the new stage of aerospace development, instruments and equipment will be more complex and advanced, and their sensitivity to the environment will be further enhanced, and the impact of multi-stress coupling effects on product mission reliability will be further highlighted.
此外，中国专利CN201510412857.9公开了一种能在航天器动力学离心状态下使用的电磁振动台，其主要包括由筒形的上部罩和筒形下部罩对接构成的外部壳体以及设置在外部壳体内的励磁部件、可沿轴向自由活动且底部设置有纵向轴的动圈、动圈支撑、导向部件、强制空气冷却风道；其中，动圈由上部的锥形主体和下部的支撑套筒构成，动圈整体与外部壳体同轴设置并支撑在动圈支撑上，动圈底部的纵向轴两侧分别设置有导向轮以限制动圈的径向位移，励磁部件围绕动圈固定在电磁振动台外部壳体的内壁上，主要包括上励磁线圈、下励磁线圈及上极板、下极板等部件，用于在供给的恒电压、恒电流的励磁电流作用下，在振动台的壳体内部产生足够强大的恒定磁场；上励磁线圈设置在动圈的锥形主体附近，下励磁线圈设置动圈的支撑套筒底部，上励磁线圈上方粘接有用于产生电磁场的上极板且下励磁线圈下方粘接有用于产生电磁场的下极板，上极板与锥形主体之间套设有抵靠锥形主体侧面的楔子，楔子顶部固定在外部壳体顶部设置的可翻折上导向装置并随着上导向装置翻折而上下移动，以和上导向装置一起对动圈的锥形主体上部进行限位，在动圈的支撑套筒内部额外加装一组直流线圈，直流线圈产生附加的平衡直流电来进行离心状态下动圈中心位置的调整。In addition, Chinese patent CN201510412857.9 discloses an electromagnetic vibrating table that can be used in a dynamic centrifugal state of a spacecraft, which mainly includes an outer shell formed by docking a cylindrical upper cover and a cylindrical lower cover and an external The excitation part in the casing, the moving coil that can move freely in the axial direction and the bottom is provided with a longitudinal axis, the moving coil support, the guide part, and the forced air cooling air duct; where the moving coil is composed of the upper conical main body and the lower supporting sleeve The whole moving coil is set coaxially with the outer casing and supported on the moving coil support. The two sides of the longitudinal axis at the bottom of the moving coil are respectively provided with guide wheels to limit the radial displacement of the moving coil. The excitation parts are fixed around the moving coil. On the inner wall of the outer casing of the electromagnetic vibrating table, it mainly includes upper excitation coil, lower excitation coil, upper pole plate, lower pole plate and other components, which are used to operate the vibrating table under the excitation current of constant voltage and constant current supplied. A strong enough constant magnetic field is generated inside the housing; the upper excitation coil is arranged near the conical body of the moving coil, the lower excitation coil is arranged at the bottom of the supporting sleeve of the moving coil, and the upper pole plate for generating an electromagnetic field is bonded above the upper excitation coil and A lower pole plate for generating an electromagnetic field is bonded under the lower excitation coil, a wedge is set between the upper pole plate and the conical main body against the side of the conical main body, and the top of the wedge is fixed on a foldable top set on the top of the outer casing. The guide device moves up and down with the upper guide device, so as to limit the upper part of the cone-shaped main body of the moving coil together with the upper guide device. An additional set of DC coils and DC coils are installed inside the support sleeve of the moving coil. Generate additional balanced direct current to adjust the center position of the moving coil in the centrifugal state.
为了适应航天产品任务可靠性测量的发展需求，避免航空航天产品在试验过程中考核不充分，不能充分暴露产品设计和制造缺陷，十分需要研制一套能够进行振动-加速度耦合环境试验的试验系统。In order to meet the development needs of aerospace product mission reliability measurement, avoid insufficient assessment of aerospace products during the test process, and fail to fully expose product design and manufacturing defects, it is very necessary to develop a test system that can perform vibration-acceleration coupling environmental tests.
发明内容Contents of the invention
本发明的目的在于提供一种能够进行振动-加速度耦合环境试验模拟装置，用于进行航天部组件产品的振动-加速度耦合环境模拟试验。The purpose of the present invention is to provide a vibration-acceleration coupling environmental test simulation device, which is used for the vibration-acceleration coupling environmental simulation test of component products of the Ministry of Aeronautics and Space.
本发明通过如下技术方案实现：The present invention realizes through following technical scheme:
一种振动-加速度耦合环境试验系统，包括：加速度环境试验系统和振动环境试验系统；其中，加速度环境试验系统主要包括机座、电动机、传动系统、测速装置、工作转臂、集流环，电控系统；机座利用螺钉机械固定在水泥地面上，基座上设置电动机，电动机外壳利用螺钉机械固定在基座上，电动机的输出经传动系统传递并驱动竖直的旋转主轴旋转，工作转臂的中心与旋转主轴同轴螺接固定并绕其旋转；测速装置由测速电机通过同步齿形带与电动机相连，以直接检测驱动电机的转速，并将检测后的转速变为电信号输出给电控系统，进而控制和调节工作转臂的实际转速；工作转臂具有适当的旋转半径和两端的安装平面，通过旋转为两端的安装平面上的试验件提供给定的恒定线加速度；旋转主轴于工作转臂的上方设置有集流环(导电滑环)，用于旋转结构动静部件间的电导通。集流环由内外环组成，外环用钢支架螺接固定在地坑安全墙上，防止其随转臂一起旋转，并通过支架引出供电导线与电控系统相连，集流环内环固定在旋转主轴上，随旋转主轴同步旋转，并引出导线与电动机相连。振动环境试验系统主要包括电磁振动台和摄像系统，其特征在于，工作转臂一端的安装平面设置有航天器动力学离心状态下使用的电磁振动台，另一端的安装平面用于安装与电磁振动台同质量的配重；电磁振动台主要包括由筒形的上部罩和筒形下部罩对接构成的外部壳体以及设置在外部壳体内的励磁部件、可沿轴向自由活动且底部设置有纵向轴的动圈、动圈支撑、导向部件、强制空气冷却风道；摄像系统设置在试验件附近以用于在振动-加速度耦合环境试验系统工作时对试验件的状态进行观察检测。A vibration-acceleration coupled environmental test system, including: an acceleration environment test system and a vibration environment test system; wherein, the acceleration environment test system mainly includes a machine base, a motor, a transmission system, a speed measuring device, a working arm, a collector ring, an electrical control system; the machine base is mechanically fixed on the concrete floor with screws, the motor is set on the base, the motor shell is mechanically fixed on the base with screws, the output of the motor is transmitted through the transmission system and drives the vertical rotating main shaft to rotate, and the working arm The center of the rotating shaft is coaxially screwed and fixed and rotates around it; the speed measuring device is connected to the motor by the speed measuring motor through a synchronous toothed belt to directly detect the speed of the driving motor, and convert the detected speed into an electrical signal and output it to the electric motor. control system, and then control and adjust the actual rotational speed of the working arm; the working arm has an appropriate radius of rotation and mounting planes at both ends, and provides a given constant linear acceleration for the test pieces on the mounting planes at both ends through rotation; the rotating spindle is at A collector ring (conductive slip ring) is arranged on the top of the working arm, which is used for electrical conduction between the moving and static parts of the rotating structure. The collector ring is composed of inner and outer rings. The outer ring is screwed and fixed on the safety wall of the pit with a steel bracket to prevent it from rotating with the boom, and the power supply wire is drawn out through the bracket to connect with the electric control system. The inner ring of the collector ring is fixed on the On the rotating main shaft, it rotates synchronously with the rotating main shaft, and the leading wire is connected with the motor. The vibration environment test system mainly includes an electromagnetic vibration table and a camera system. It is characterized in that the installation plane at one end of the working arm is equipped with an electromagnetic vibration table used in the dynamic centrifugal state of the spacecraft, and the installation plane at the other end is used for installation and electromagnetic vibration. The counterweight of the same mass as the table; the electromagnetic vibrating table mainly includes an outer shell formed by butt joints of a cylindrical upper cover and a cylindrical lower cover, and an excitation component arranged in the outer shell, which can move freely in the axial direction and has a longitudinal The moving coil of the shaft, the moving coil support, the guide parts, the forced air cooling air duct; the camera system is set near the test piece to observe and detect the state of the test piece when the vibration-acceleration coupled environmental test system is working.
其中，电磁振动台具有与中国专利CN201510412857.9里的电磁振动台相同的结构，在此将其全部内容以引证的方式并入本文。Among them, the electromagnetic vibrating table has the same structure as the electromagnetic vibrating table in Chinese patent CN201510412857.9, and its entire content is incorporated herein by reference.
其中，电动机通过弹性联轴器带动减速箱箱体内的一对锥齿轮进行减速，其中大锥齿轮设置在旋转主轴上，工作转臂也固定在旋转主轴上，带动工作转臂绕其旋转。Among them, the motor drives a pair of bevel gears in the reduction box to decelerate through the elastic coupling. The large bevel gear is set on the rotating main shaft, and the working arm is also fixed on the rotating main shaft, which drives the working arm to rotate around it.
其中，机座通过脚螺栓固定在水泥地面上，用于提供离心机台体的基准安装面，并提供抗倾覆力矩以防止在运转过程中倾覆。Among them, the machine base is fixed on the concrete floor by foot bolts, which is used to provide the reference installation surface of the centrifuge body and provide an anti-overturning moment to prevent overturning during operation.
优选地，工作转臂为焊接刚性结构。Preferably, the working boom is a welded rigid structure.
优选地，工作转臂两端安装平面上制作有安装孔，并装有标尺，以确定试验件的安装半径。Preferably, installation holes are made on the installation planes at both ends of the working arm, and a scale is installed to determine the installation radius of the test piece.
优选地，工作转臂与旋转主轴通过法兰盘刚性地连接在一起，以消除由于转臂上下波动而带来的恒加速度变化。Preferably, the working arm and the rotating main shaft are rigidly connected together through a flange, so as to eliminate constant acceleration changes caused by the up and down fluctuation of the arm.
其中，强制空气冷却系统利用弹性风管将电动振动台与风机连接，利用风机带动电动振动台内空气强制对流，对电动振动台进行冷却。Among them, the forced air cooling system uses elastic air ducts to connect the electric vibrating table with the fan, and uses the fan to drive the forced convection of the air in the electric vibrating table to cool the electric vibrating table.
优选地，电磁振动台的安装方式为顺臂固定连接，安装方向为动圈水平向外，使电磁振台提供的振动激励方向与离心机提供的恒定线加速度方向平行，同时使离心机工作时与振动台的相对位置保持固定。Preferably, the installation method of the electromagnetic vibrating table is fixed connection along the arm, and the installation direction is that the moving coil is horizontally outward, so that the vibration excitation direction provided by the electromagnetic vibrating table is parallel to the constant linear acceleration direction provided by the centrifuge, and at the same time, when the centrifuge is working, The relative position to the vibrating table remains fixed.
优选地，电磁振动台的风机和电控系统的接线板通过螺接固定在工作转臂上，并尽量靠近旋转主轴，以减少试验过程中其上所受离心力。Preferably, the fan of the electromagnetic vibrating table and the wiring board of the electric control system are fixed on the working arm by screwing, and are as close as possible to the rotating main shaft, so as to reduce the centrifugal force on it during the test.
优选地，电磁振动台通过螺接固定在工作转臂上，并在电磁振动台上设置有吊环，实现振动台的快速装拆。Preferably, the electromagnetic vibrating table is fixed on the working arm by screwing, and a suspension ring is provided on the electromagnetic vibrating table to realize quick assembly and disassembly of the vibrating table.
优选地，整个振动-加速度耦合环境试验系统设置在试验地坑中，并采用安全墙隔离。Preferably, the entire vibration-acceleration coupled environmental test system is set in a test pit and is isolated by a safety wall.
本发明具有如下的有益效果：The present invention has following beneficial effect:
(1)结构简单：本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统无需对离心机和振动台进行过多改造，且振动台台体不用减震悬挂转置，而是通过一对L型支架固定在转臂上。各部件之间的连接主要依靠螺栓连接方式，可靠性高，且方便装拆更换。(1) Simple in structure: a kind of vibration-acceleration coupled environmental test system for spacecraft dynamics test of the present invention does not need to carry out too many modifications to the centrifuge and the vibrating table, and the vibrating table body does not need shock-absorbing suspension transposition, Instead, it is fixed to the boom by a pair of L-shaped brackets. The connection between the components mainly depends on the bolt connection method, which has high reliability and is convenient for assembly, disassembly and replacement.
(2)易于操控：本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统中，离心机与振动台分开进行控制，可在离心机转速稳定后再开启振动台，易于控制振动-加速度耦合试验的试验量级和时间。(2) Easy to control: in a kind of vibration-acceleration coupled environmental test system used for spacecraft dynamics test of the present invention, the centrifuge is controlled separately from the vibrating table, and the vibrating table can be turned on after the centrifuge speed is stable, which is easy Control the test magnitude and time of the vibration-acceleration coupling test.
(3)可提供振动-加速度耦合试验环境：有别于传统的力学试验系统，本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统是一种能够进行振动-加速度耦合环境试验模拟装置，可用于考核航天产品对振动-加速度耦合环境的耐受能力。(3) Vibration-acceleration coupling test environment can be provided: Different from traditional mechanical test systems, a vibration-acceleration coupling environment test system for spacecraft dynamics tests of the present invention is a vibration-acceleration coupling environment test system that can perform vibration-acceleration coupling The environmental test simulator can be used to assess the tolerance of aerospace products to the vibration-acceleration coupling environment.
附图说明Description of drawings
图1为本发明的用于航天器动力学试验的振动-加速度耦合环境试验系统的正视图。Fig. 1 is the front view of the vibration-acceleration coupled environmental test system for spacecraft dynamic test of the present invention.
图2为本发明的用于航天器动力学试验的振动-加速度耦合环境试验系统的俯视图。Fig. 2 is a top view of the vibration-acceleration coupled environmental test system for spacecraft dynamic tests of the present invention.
其中：1机座；2电动机；3测速装置；4联轴器；5减速器箱体；6旋转主轴；7工作转臂；8集流环；9配重；10电控系统的接线面板；11风机；12电磁振动台吊环；13电磁振动台；14钢支架；15地坑安全墙；16摄像系统；17转臂安装平面。Among them: 1 base; 2 motor; 3 speed measuring device; 4 coupling; 5 reducer box; 6 rotating main shaft; 7 working arm; 8 collector ring; 9 counterweight; 11 fan; 12 rings of electromagnetic vibrating table; 13 electromagnetic vibrating table; 14 steel bracket; 15 pit safety wall; 16 camera system;
图3为本发明的用于航天器动力学试验的振动-加速度耦合环境试验系统的减速器箱体的部分传动原理图。Fig. 3 is a partial transmission schematic diagram of the reducer box of the vibration-acceleration coupled environmental test system used in the spacecraft dynamic test of the present invention.
其中：21箱体外壳；22加强型圆锥滚子轴承；23锥齿轮对中大齿轮；24锥齿轮对中小齿轮；25加强型圆锥滚子轴承；6旋转主轴；27加强型圆锥滚子轴承；4联轴器。Among them: 21 box shell; 22 reinforced tapered roller bearing; 23 bevel gear to medium and large gear; 24 bevel gear to medium and small gear; 25 reinforced tapered roller bearing; 6 rotating main shaft; 27 reinforced tapered roller bearing; 4 couplings.
具体实施方式detailed description
以下结合附图对本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统进行详细说明，具体实施方式仅为示例的目的，并不旨在限制本发明的保护范围。A vibration-acceleration coupled environmental test system for spacecraft dynamic tests of the present invention will be described in detail below in conjunction with the accompanying drawings. The specific implementation is only for the purpose of illustration and is not intended to limit the protection scope of the present invention.
参照图1-2，图1-2分别显示了本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统的主视图和俯视图。根据附图显示可以知晓，本发明的振动-加速度耦合环境试验系统包括机座1；电动机2；测速装置3；联轴器4；减速器箱体5；旋转主轴6；工作转臂7；集流环8；配重9；电控系统的接线面板10；风机11；电磁振动台吊环12；电磁振动台13；钢支架14；地坑安全墙15；摄像系统16；转臂安装平面17。其中，本发明的用于航天器动力学试验的振动-加速度耦合环境试验系统的减速器箱体的结构示意图如图3所示，联轴器4通过螺接固定在锥齿轮对中小锥齿轮24的主轴上，大锥齿轮23与旋转主轴26固连，两个锥齿轮轴通过加强型圆锥滚子轴承22、25和27固定在减速器箱体外壳21上。当驱动电机带动联轴器4运转时，减速器箱体传动组件可实现转动的减速和转向，从而驱动旋转主轴6旋转。Referring to Figures 1-2, Figures 1-2 respectively show a front view and a top view of a vibration-acceleration coupled environmental test system for spacecraft dynamic tests of the present invention. According to the accompanying drawings, it can be known that the vibration-acceleration coupling environment test system of the present invention includes a support 1; a motor 2; a speed measuring device 3; a shaft coupling 4; a reducer casing 5; Flow ring 8; counterweight 9; electrical control system wiring panel 10; fan 11; electromagnetic vibrating table suspension ring 12; electromagnetic vibrating table 13; steel bracket 14; pit safety wall 15; camera system 16; Wherein, the structure schematic diagram of the reducer casing of the vibration-acceleration coupled environmental test system used for the spacecraft dynamics test of the present invention is shown in Figure 3, and the shaft coupling 4 is fixed on the small bevel gear 24 of the bevel gear pair by screwing On the main shaft, the large bevel gear 23 is fixedly connected with the rotating main shaft 26, and the two bevel gear shafts are fixed on the reducer box shell 21 through reinforced tapered roller bearings 22, 25 and 27. When the driving motor drives the shaft coupling 4 to run, the gear box transmission assembly of the reducer can realize the deceleration and steering of the rotation, thereby driving the rotating main shaft 6 to rotate.
在一实施方式中，本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统的机座1通过脚螺栓安装在专用试验地坑中，电动机2和减速器箱体5通过螺接固定在机座1上。测速装置3固定在电动机2的外壳上，且测速电机轴与电动机机轴通过同步齿形带连接。联轴器4通过螺接一端固定在电动机2轴上，另一端固定在减速器箱体5中锥齿轮对的小锥齿轮轴上。当电动机2旋转时，通过联轴器4将转动传递到减速器箱体5内，并通过减速器箱体5内的传动组件驱动旋转主轴6旋转，同时带动测速装置3中的电机旋转，由于各传动机构的传动比已知，通过测速装置3中电机的转速便可测算出旋转主轴6的转速。工作转臂7通过螺接固定在旋转主轴6上，并随旋转主轴6一同旋转。集流环8由内外环组成，外环用钢支架14螺接固定在地坑安全墙15上，防止其随转臂一起旋转，并通过支架引出供电导线与电控系统相连，集流环内环固定在旋转主轴6上，随旋转主轴6同步旋转，并引出导线与电动机2相连。电控系统的接线面板10、风机11、转臂安装平面15分别螺接固定在工作转臂7上。工作转臂一端的安装平面17设计有一对L型支架，用于螺接安装、固定电磁振动台13和摄像系统16，当电动机2启动时，电磁振动台13随工作转臂7同步旋转，从而受到离心线加速度的作用。摄像系统16的摄像头正对电磁振动台13的载物台，用于在工作转臂7旋转的情况下观察受试产品的状况。同时安装平面17的L型支架上带有凸台，与电磁振动台13壳体上的凹形槽配合，用于电磁振动台13安装时的定位。电磁振动台13的壳体上螺接有吊环12，用于电磁振动台拆装时的起吊。电磁振动台13的出风口与风机11通过铝箔软管连接，风机11启动后用于电磁振动台13的强制风冷。转臂另一端的安装平面17上通过螺栓固定配重9，用以配平电磁振动台13的重量，消除旋转过程中主轴6受到的倾覆力矩。In one embodiment, the base 1 of a vibration-acceleration coupled environmental test system for spacecraft dynamics tests of the present invention is installed in a special test pit through foot bolts, and the motor 2 and the reducer box 5 pass through Screw connection is fixed on the machine base 1. The speed measuring device 3 is fixed on the casing of the motor 2, and the speed measuring motor shaft and the motor shaft are connected through a synchronous toothed belt. One end of the shaft coupling 4 is fixed on the shaft of the motor 2 through screw connection, and the other end is fixed on the pinion shaft of the bevel gear pair in the reducer case 5 . When the motor 2 rotates, the rotation is transmitted to the reducer case 5 through the coupling 4, and the rotating main shaft 6 is driven to rotate through the transmission assembly in the reducer case 5, and the motor in the speed measuring device 3 is driven to rotate at the same time. The transmission ratio of each transmission mechanism is known, and the rotational speed of the rotating main shaft 6 can be measured and calculated by the rotational speed of the motor in the speed measuring device 3 . The working arm 7 is fixed on the rotating main shaft 6 by screwing, and rotates together with the rotating main shaft 6 . The collector ring 8 is composed of inner and outer rings, and the outer ring is screwed and fixed on the safety wall 15 of the pit with a steel bracket 14 to prevent it from rotating with the rotating arm. The ring is fixed on the rotating main shaft 6, rotates synchronously with the rotating main shaft 6, and leads out wires to connect with the motor 2. The wiring panel 10 of the electric control system, the blower fan 11 and the rotating arm installation plane 15 are screwed and fixed on the working rotating arm 7 respectively. The installation plane 17 at one end of the working arm is designed with a pair of L-shaped brackets, which are used for screw connection installation and fixing the electromagnetic vibrating table 13 and the camera system 16. When the motor 2 is started, the electromagnetic vibrating table 13 rotates synchronously with the operating arm 7, thereby affected by centrifugal acceleration. The camera of the camera system 16 faces the stage of the electromagnetic vibrating table 13, and is used to observe the condition of the product under test when the working arm 7 rotates. Simultaneously, the L-shaped support of the installation plane 17 has a boss, which cooperates with the concave groove on the shell of the electromagnetic vibrating table 13, and is used for positioning when the electromagnetic vibrating table 13 is installed. The housing of the electromagnetic vibrating table 13 is screwed with a suspension ring 12 for lifting when the electromagnetic vibrating table is disassembled. The air outlet of the electromagnetic vibrating table 13 is connected with the fan 11 through an aluminum foil hose, and the fan 11 is used for forced air cooling of the electromagnetic vibrating table 13 after starting. The mounting plane 17 at the other end of the pivoting arm is fixed with a counterweight 9 by bolts to balance the weight of the electromagnetic vibrating table 13 and eliminate the overturning moment of the main shaft 6 during the rotation process.
本发明的一种用于航天器动力学试验的振动-加速度耦合环境试验系统的研制原理如下：The development principle of a vibration-acceleration coupled environmental test system for spacecraft dynamics test of the present invention is as follows:
当离心机启动时，由于电磁振动台与离心机转臂刚性连接，因此电磁振动台随离心机转臂一同旋转，当离心机转速稳定后，电磁振动台及其上搭载的受试产品即受到恒定的线加速度作用。此时再开启电磁振动台，为受试产品提供额外的振动载荷激励，则受试产品即处于振动-加速度耦合试验环境中。When the centrifuge is started, the electromagnetic vibrating table and the centrifuge arm are rigidly connected, so the electromagnetic vibrating table rotates together with the centrifuge arm. Constant linear acceleration effect. At this time, the electromagnetic vibration table is turned on to provide additional vibration load excitation for the tested product, and the tested product is in the vibration-acceleration coupling test environment.
本发明的加速度环境试验系统和振动环境试验系统可同时工作，可进行正弦振动-加速度耦合试验、随机振动-加速度耦合试验和冲击-加速度耦合试验。试验中振动量级与时间、加速度量级与时间可分别单独指定。The acceleration environment test system and the vibration environment test system of the present invention can work simultaneously, and can perform sinusoidal vibration-acceleration coupling tests, random vibration-acceleration coupling tests and shock-acceleration coupling tests. The magnitude and time of vibration and the magnitude and time of acceleration in the test can be specified separately.
其中，振动-加速度耦合环境试验能力：最大恒定线加速度20g；最大振动激振推力≥1000N(正弦振动、随机振动条件下)，≥2000N(冲击条件下)；满负荷连续工作时间优于30min。Among them, the vibration-acceleration coupling environmental test capability: the maximum constant linear acceleration is 20g; the maximum vibration excitation thrust is ≥1000N (under sinusoidal vibration and random vibration conditions), ≥2000N (under impact conditions); the continuous working time at full load is better than 30min.
集流环包括500V、5A360环，40A10环，10A8环，±10V24环，满足绝大部分航天部组件产品加电试验要求。The collector rings include 500V, 5A360 rings, 40A10 rings, 10A8 rings, and ±10V24 rings, which meet the power-on test requirements of most aerospace component products.
尽管上文对本发明的具体实施方式进行了详细的描述和说明，但应该指明的是，我们可以对上述实施方式进行各种改变和修改，但这些都不脱离本发明的精神和所附的权利要求所记载的范围。Although the specific embodiments of the present invention have been described and illustrated in detail above, it should be pointed out that we can make various changes and modifications to the above embodiments, but these do not depart from the spirit of the present invention and the appended rights. Request the range described.
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