CN202886036U - Device for testing wire-wound moment of rotary table - Google Patents
Device for testing wire-wound moment of rotary table Download PDFInfo
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- CN202886036U CN202886036U CN 201220491204 CN201220491204U CN202886036U CN 202886036 U CN202886036 U CN 202886036U CN 201220491204 CN201220491204 CN 201220491204 CN 201220491204 U CN201220491204 U CN 201220491204U CN 202886036 U CN202886036 U CN 202886036U
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Abstract
The utility model relates to a device for testing the wire-wound moment of a rotary table, comprising a rotary platform, a rate gyroscope, a B member, a rotary platform driving unit and a data processing computer, wherein the rotary platform and the B member are respectively and electrically connected with the data processing computer, the rotary platform driving unit drives the rotary platform to rotate independently, and a rotary component to be tested and the rate gyroscope are arranged on the rotary platform and rotate synchronously with the rotary platform. The device for testing the wire-wound moment of a rotary table is simple in structure, high in testing precision and convenient in operation.
Description
Technical field
The utility model belongs to optical field, relates to a kind of force moment testing device, relates in particular to a kind of turntable wire-wound force moment testing device.
Background technology
Wire-wound moment: because the caused disturbance torque that affects the turntable rotation of pulling force that the power lead on the turntable and signal wire apply turntable.Wire-wound moment not only can affect precision and the smoothness of turntable motion, also can cause the turntable stall when serious.Therefore, wire-wound moment is the same with moment of friction to be very important technical parameter, all the impact of wire-wound moment will be taken into account when selecting drive motor and control parameter testing.
Wire-wound moment is on the impact of spatial rotation parts: spacecraft in orbit is under the space microgravity environment, externally is an independently system, and whole system is not subjected to moment of face effect, system angle momentum conservation substantially.The variation of any one parts angular momentum brings disturbance all can for whole platform on the spacecraft, the lighter affects the attitude stabilization precision of satellite platform, and then reducing whole satellite performance, severe one will be brought to the attitude of satellite and track and have a strong impact on, and finally affect finishing of whole satellite function and task.
The below illustrates the impact of wire-wound moment as an example of the space turntable example: under normal mode of operation, motor is in powering state, turntable rotates under the driving of motor stably, turntable has the output of certain moment and angular momentum to satellite but in satellite attitude stabilization system range of control, can the attitude of satellite platform not impacted.But, if turntable forwards the larger position of a certain wire-wound moment to and just quits work in this position motors outage, because motor has had moment output, then turntable will accelerate under the effect of wire-wound moment to rotate that to get back to wire-wound moment less or be zero position, and settles out.By the moment of momentum theorem as can be known, when wire-wound moment was larger, the angular acceleration that turntable rotates will be larger, and moment and angular momentum to satellite platform output in the turntable rotation process are just larger, and is also just larger to the interference of satellite platform.Therefore, research rotatable parts particularly the spatial rotation parts wire-wound moment method of testing and build effective proving installation, wire-wound moment is accurately measured, assess its impact, and take corresponding solution to have important engineering use value.
The utility model content
In order to solve the above-mentioned technical matters that exists in the background technology, the utility model provide a kind of simple in structure, measuring accuracy is high and operate easily turntable wire-wound force moment testing device.
Technical solution of the present utility model is: the utility model provides a kind of turntable wire-wound force moment testing device, and its special character is: described turntable wire-wound force moment testing device comprises rotatable platform, rate gyroscope, B code, rotatable platform driver element and data handling machine; Described rotatable platform and B code are electrical connected with data handling machine respectively; Described rotatable platform drive unit drives rotatable platform carries out autobiography; Rotatable parts to be measured and described rate gyroscope are arranged on the rotatable platform and with rotatable platform and rotate synchronously.
Above-mentioned rotatable platform driver element comprises counterweight, connection cord and pulley; One end of described connection cord is wrapped in the rotatable platform periphery, and the other end passes pulley and is connected with unsettled counterweight; Described counterweight drives rotatable platform by connection cord and carries out rotation under its Action of Gravity Field.
The rotation axis of above-mentioned rotatable parts to be measured parallels with the rotation axis of rotatable platform.
The input shaft of above-mentioned rate gyroscope parallels with the rotation axis of rotatable parts to be measured.
Above-mentioned rotatable platform is the air supporting rotatable platform.
Above-mentioned rate gyroscope is the optical fiber rate gyroscope.
The utility model has the advantages that:
The utility model provides a kind of turntable wire-wound force moment testing device, and this turntable wire-wound force moment testing device comprises rotatable platform (especially adopting the air supporting rotatable platform), rate gyroscope, B code, rotatable platform driver element and data handling machine; Wherein the air supporting rotatable platform is the core of this system, utilizes the less characteristics of its moment of friction, the satellite platform of simulation operation on orbit, and tested rotatable parts consist of an autonomous system, momentum conservation on air supporting rotatable platform rotation direction; Rate gyroscope is measured air supporting rotatable platform rotational angular velocity; The B code is used to provide temporal information, and and one of rate gyroscope finish the measurement of air supporting rotatable platform angle of rotation acceleration; The high precision counterweight is used for the air supporting rotatable platform is applied accurately known moment; Data handling machine is used for finishing relevant data to be processed.The air supporting rotatable platform has the little characteristics of moment of friction, and when ignoring air supporting rotatable platform moment of friction, the suffered moment of face of system that air supporting rotatable platform and rotatable parts to be measured form is zero, the system angle momentum conservation.By the law of conservation of angular momentum, the variation equal and opposite in direction of the variation of the angular momentum of rotatable parts to be measured and air supporting rotatable platform angular momentum, opposite in sign.Therefore, can come by the variation of test air rotatable platform angular momentum the variation of indirect slotted line angular momentum of rotatable parts to be measured under moment loading.By the moment of momentum theorem as can be known, because the rate of change of angular momentum namely is Moment, therefore, can be by to can indirectly measuring over time by test air rotatable platform angular momentum the wire-wound moment of rotatable parts to be measured, simple in structure based on proving installation provided by the utility model, measuring accuracy is high and convenient operation.
Description of drawings
Fig. 1 is the principle schematic of turntable wire-wound force moment testing device provided by the utility model;
Wherein:
The 1-B code; The 2-data handling machine; 3-air supporting rotatable platform; The 4-rate gyroscope; 5-rotatable parts to be measured; The 6-counterweight.
Embodiment
Referring to Fig. 1, the utility model provides a kind of turntable wire-wound force moment testing device, and this turntable wire-wound force moment testing device comprises rotatable platform, rate gyroscope 4, B code 1, rotatable platform driver element and data handling machine 2; Rotatable platform and B code 1 are electrical connected with data handling machine 2 respectively; Rotatable platform drive unit drives rotatable platform carries out autobiography; Rotatable parts 5 to be measured and described rate gyroscope 4 are arranged on the rotatable platform and with rotatable platform and rotate synchronously.
The rotatable platform driver element comprises counterweight 6, connection cord and pulley; One end of connection cord is wrapped in the rotatable platform periphery, and the other end passes pulley and is connected with unsettled counterweight 6; Counterweight 6 drives rotatable platform by connection cord and carries out rotation under its Action of Gravity Field.
The rotation axis of rotatable parts 5 to be measured parallels with the rotation axis of rotatable platform; The input shaft of rate gyroscope 4 parallels with the rotation axis of rotatable parts 5 to be measured.
Rotatable platform is air supporting rotatable platform 3 preferably; Rate gyroscope 4 is optical fiber rate gyroscopes 4.
Wherein air supporting rotatable platform 3 is cores of this system, utilizes the less characteristics of its moment of friction, the satellite platform of simulation operation on orbit, and tested rotatable parts consist of an autonomous system, momentum conservation on air supporting rotatable platform 3 rotation directions; Rate gyroscope 4 is measured air supporting rotatable platform 3 rotational angular velocities; B code 1 is used to provide temporal information, and and 4 measurements of finishing air supporting rotatable platform 3 angle of rotation acceleration of rate gyroscope; High precision counterweight 6 is used for air supporting rotatable platform 3 is applied accurately known moment; Data handling machine 2 is used for finishing relevant data to be processed.
Principle of work of the present utility model is: air supporting rotatable platform 3 has the little characteristics of moment of friction, and when ignoring air supporting rotatable platform 3 moment of friction, the suffered moment of face of system that air supporting rotatable platform 3 and rotatable parts to be measured 5 form is zero, the system angle momentum conservation.By the law of conservation of angular momentum, the variation equal and opposite in direction of the variation of the angular momentum of rotatable parts 5 to be measured and air supporting rotatable platform 3 angular momentums, opposite in sign.Therefore, can come by the variation of test air rotatable platform 3 angular momentums the variation of indirect slotted line angular momentum of rotatable parts 5 to be measured under moment loading.By the moment of momentum theorem as can be known, because the rate of change of angular momentum namely is Moment, therefore, can be by to can be by the test air rotatable platform 3 angular momentums indirect wire-wound moment of measurement rotatable parts 5 to be measured over time.
Concrete testing procedure of the present utility model is:
1) rotatable parts to be measured is fixed on the air supporting rotatable platform Table top able to be rotated, and makes rotating shaft and the air supporting rotatable platform shaft parallel of rotatable parts to be measured by adjusting;
2) the optical fiber rate gyroscope is fixed on the air supporting rotatable platform Table top able to be rotated, and makes the shaft parallel of its input shaft and rotatable parts to be measured;
3) the air supporting rotatable platform is floated and it is carried out leveling, to reduce the moment of friction of air supporting rotatable platform self;
4) by hanging the counterweight of different quality, utilize the gravity of counterweight self that the air supporting rotatable platform is applied tangent line moment, make the air supporting rotatable platform accelerate to rotate, and according to the Output rusults of rate gyroscope and B code, calculate air supporting rotatable platform moment of friction; If (air supporting rotatable platform moment of friction is relatively very little by measuring moment, and in the time of can ignoring, this step can be skipped.）
5) pass through suspended high precision counterweight at air supporting rotatable platform edge, the air supporting rotatable platform accelerates rotation under the effect of the moment that counterweight applies, data handling machine is acquisition rate gyroscope and B code data simultaneously, calculates the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured by following formula (1);
In the formula:
J---the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured;
M---counterweight is to air supporting moment that rotatable platform applies;
M
0---air supporting rotatable platform moment of friction; If the moment of friction of air supporting rotatable platform is relatively very little by measuring moment, can ignore;
6) rotatable parts to be measured are navigated to a certain position, then Spontaneous release, rotatable parts to be measured accelerate to rotate under the wire-wound moment loading, its output torque drives air supporting rotatable platform counter-rotation, according to data handling machine while acquisition rate gyroscope and B code data, by the output torque of following formula rotatable parts to be measured;
In the formula:
J---the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured;
M---tested wire-wound moment;
M
0---air supporting rotatable platform moment of friction; If the moment of friction of air supporting rotatable platform is relatively very little by measuring moment, can ignore;
Claims (6)
1. turntable wire-wound force moment testing device, it is characterized in that: described turntable wire-wound force moment testing device comprises rotatable platform, rate gyroscope, B code, rotatable platform driver element and data handling machine; Described rotatable platform and B code are electrical connected with data handling machine respectively; Described rotatable platform drive unit drives rotatable platform carries out rotation; Rotatable parts to be measured and described rate gyroscope are arranged on the rotatable platform and with rotatable platform and rotate synchronously.
2. turntable wire-wound force moment testing device according to claim 1, it is characterized in that: described rotatable platform driver element comprises counterweight, connection cord and pulley; One end of described connection cord is wrapped in the rotatable platform periphery, and the other end passes pulley and is connected with unsettled counterweight; Described counterweight drives rotatable platform by connection cord and carries out rotation under its Action of Gravity Field.
3. turntable wire-wound force moment testing device according to claim 1 and 2, it is characterized in that: the rotation axis of described rotatable parts to be measured parallels with the rotation axis of rotatable platform.
4. turntable wire-wound force moment testing device according to claim 3, it is characterized in that: the input shaft of described rate gyroscope parallels with the rotation axis of rotatable parts to be measured.
5. turntable wire-wound force moment testing device according to claim 4, it is characterized in that: described rotatable platform is the air supporting rotatable platform.
6. turntable wire-wound force moment testing device according to claim 5, it is characterized in that: described rate gyroscope is the optical fiber rate gyroscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220491204 CN202886036U (en) | 2012-09-25 | 2012-09-25 | Device for testing wire-wound moment of rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220491204 CN202886036U (en) | 2012-09-25 | 2012-09-25 | Device for testing wire-wound moment of rotary table |
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| Publication Number | Publication Date |
|---|---|
| CN202886036U true CN202886036U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220491204 Expired - Fee Related CN202886036U (en) | 2012-09-25 | 2012-09-25 | Device for testing wire-wound moment of rotary table |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879139A (en) * | 2012-09-25 | 2013-01-16 | 中国科学院西安光学精密机械研究所 | Device and method for testing wire-wound moment of rotary table |
-
2012
- 2012-09-25 CN CN 201220491204 patent/CN202886036U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879139A (en) * | 2012-09-25 | 2013-01-16 | 中国科学院西安光学精密机械研究所 | Device and method for testing wire-wound moment of rotary table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20150925 |
|
| EXPY | Termination of patent right or utility model |