CN102879139A - Device and method for testing wire-wound moment of rotary table - Google Patents
Device and method for testing wire-wound moment of rotary table Download PDFInfo
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- CN102879139A CN102879139A CN2012103588092A CN201210358809A CN102879139A CN 102879139 A CN102879139 A CN 102879139A CN 2012103588092 A CN2012103588092 A CN 2012103588092A CN 201210358809 A CN201210358809 A CN 201210358809A CN 102879139 A CN102879139 A CN 102879139A
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Abstract
The invention relates to a device and a method for testing the wire-wound moment of a rotary table. The device for testing the wire-wound moment of the rotary table comprises a rotating platform, a rate gyroscope, a B code, a rotating platform driving unit and a data processing computer, wherein the rotating platform and the B code are electrically connected with the data processing computer respectively; the rotating platform driving unit drives the rotating platform to rotate; and a rotating component to be tested and the rate gyroscope are arranged on the rotating platform, and the rotating component to be tested, the rate gyroscope and the rotating platform rotate synchronously. The device for testing the wire-round moment of the rotary table is simple in structure, and the device and the method for testing the wire-round moment of the rotary table are high in testing accuracy and convenient to operate.
Description
Technical field
The invention belongs to optical field, relate to a kind of force moment testing device and method of testing, relate in particular to a kind of turntable wire-wound force moment testing device and method of testing.
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.
Summary of the invention
In order to solve the above-mentioned technical matters that exists in the background technology, the invention provides a kind of simple in structure, measuring accuracy is high and operate easily turntable wire-wound force moment testing device and method of testing.
Technical solution of the present invention is: the invention provides a kind of turntable wire-wound force moment testing device, 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.
A kind of turntable wire-wound moment method of testing, its special character is: described method of testing may further comprise the steps:
1) rotatable parts to be measured is fixed on the Table top able to be rotated of air supporting rotatable platform, and makes rotation axis 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 Table top able to be rotated of air supporting rotatable platform, and makes the input shaft of optical fiber rate gyroscope parallel with the rotation axis of 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;
5) pass through suspended high precision counterweight at air supporting rotatable platform edge, under the effect of the moment that the high precision counterweight applies, make the air supporting rotatable platform accelerate rotation, data handling machine is acquisition rate gyroscope and B code data simultaneously, and calculates the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured according to following formula;
Wherein:
J---the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured;
M---the high precision counterweight is to air supporting moment that rotatable platform applies;
M
0---the moment of friction of air supporting rotatable platform; 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, according to 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---wire-wound moment to be measured;
M
0---the moment of friction of air supporting rotatable platform; If the moment of friction of air supporting rotatable platform is relatively very little by measuring moment, can ignore;
Above-mentioned method of testing also comprises between step 3) and step 5):
4) by hanging the high precision counterweight of different quality, utilize the gravity of high precision counterweight self that the air supporting rotatable platform is applied tangent line moment, the air supporting rotatable platform accelerate to be rotated, and according to the Output rusults of rate gyroscope and B code, calculate air supporting rotatable platform moment of friction.
Advantage of the present invention is:
The invention provides a kind of turntable wire-wound force moment testing device, 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 present invention, 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 present invention;
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 invention provides a kind of turntable wire-wound force moment testing device, 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 invention 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 invention 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 (8)
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.
7. method of testing based on turntable wire-wound force moment testing device claimed in claim 6, it is characterized in that: described method of testing may further comprise the steps:
1) rotatable parts to be measured is fixed on the Table top able to be rotated of air supporting rotatable platform, and makes rotation axis 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 Table top able to be rotated of air supporting rotatable platform, and makes the input shaft of optical fiber rate gyroscope parallel with the rotation axis of 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;
5) pass through suspended high precision counterweight at air supporting rotatable platform edge, under the effect of the moment that the high precision counterweight applies, make the air supporting rotatable platform accelerate rotation, data handling machine is acquisition rate gyroscope and B code data simultaneously, and calculates the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured according to following formula;
Wherein:
J---the moment of inertia of air supporting rotatable platform face and rotatable parts to be measured;
M---the high precision counterweight is to air supporting moment that rotatable platform applies;
M
0---the moment of friction of air supporting rotatable platform; 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, according to 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---wire-wound moment to be measured;
M
0---the moment of friction of air supporting rotatable platform; If the moment of friction of air supporting rotatable platform is relatively very little by measuring moment, can ignore;
8. method of testing according to claim 7, it is characterized in that: described method of testing also comprises between step 3) and step 5):
4) by hanging the high precision counterweight of different quality, utilize the gravity of high precision counterweight self that the air supporting rotatable platform is applied tangent line moment, the air supporting rotatable platform accelerate to be rotated, and according to the Output rusults of rate gyroscope and B code, calculate air supporting rotatable platform moment of friction.
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| CN2012103588092A CN102879139A (en) | 2012-09-25 | 2012-09-25 | Device and method for testing wire-wound moment of rotary table |
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| CN2012103588092A CN102879139A (en) | 2012-09-25 | 2012-09-25 | Device and method for testing wire-wound moment of rotary table |
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Cited By (8)
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| CN103604562A (en) * | 2013-11-05 | 2014-02-26 | 中国科学院西安光学精密机械研究所 | Device for testing rotational inertia of two-dimensional rotation mechanism and complex parts of two-dimensional rotation mechanism and method thereof |
| CN106441705A (en) * | 2016-08-31 | 2017-02-22 | 北京航天控制仪器研究所 | Test method for online rotational inertia of rotary table |
| CN106979841A (en) * | 2017-04-28 | 2017-07-25 | 沈阳建筑大学 | High-precision rotation inerttia instrument |
| CN107063568A (en) * | 2017-03-22 | 2017-08-18 | 上海交通大学 | A kind of inertia and stiffness system simulation test device and experimental method |
| CN108225637A (en) * | 2017-03-30 | 2018-06-29 | 上海航天设备制造总厂 | Driving mechanism driving moment test device and method |
| CN110057564A (en) * | 2019-04-25 | 2019-07-26 | 中国科学院西安光学精密机械研究所 | A kind of shafting dynamic resistance torque test device and test method |
| CN112525502A (en) * | 2020-11-04 | 2021-03-19 | 天津大学前沿技术研究院有限公司 | Device and method for testing performance of magnetohydrodynamic inertial momentum wheel |
| CN113884391A (en) * | 2021-10-12 | 2022-01-04 | 西安邮电大学 | Device for testing torque of satellite through-shaft low-frequency cable |
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| CN103604562A (en) * | 2013-11-05 | 2014-02-26 | 中国科学院西安光学精密机械研究所 | Device for testing rotational inertia of two-dimensional rotation mechanism and complex parts of two-dimensional rotation mechanism and method thereof |
| CN103604562B (en) * | 2013-11-05 | 2016-04-27 | 中国科学院西安光学精密机械研究所 | The proving installation of two-dimensional rotation mechanism and complex parts moment of inertia thereof and method |
| CN106441705A (en) * | 2016-08-31 | 2017-02-22 | 北京航天控制仪器研究所 | Test method for online rotational inertia of rotary table |
| CN106441705B (en) * | 2016-08-31 | 2018-10-19 | 北京航天控制仪器研究所 | A kind of online rotary inertia test method of turntable |
| CN107063568A (en) * | 2017-03-22 | 2017-08-18 | 上海交通大学 | A kind of inertia and stiffness system simulation test device and experimental method |
| CN107063568B (en) * | 2017-03-22 | 2023-08-29 | 上海交通大学 | Inertia and rigidity system simulation test device and test method |
| CN108225637A (en) * | 2017-03-30 | 2018-06-29 | 上海航天设备制造总厂 | Driving mechanism driving moment test device and method |
| CN106979841A (en) * | 2017-04-28 | 2017-07-25 | 沈阳建筑大学 | High-precision rotation inerttia instrument |
| CN110057564A (en) * | 2019-04-25 | 2019-07-26 | 中国科学院西安光学精密机械研究所 | A kind of shafting dynamic resistance torque test device and test method |
| CN112525502A (en) * | 2020-11-04 | 2021-03-19 | 天津大学前沿技术研究院有限公司 | Device and method for testing performance of magnetohydrodynamic inertial momentum wheel |
| CN113884391A (en) * | 2021-10-12 | 2022-01-04 | 西安邮电大学 | Device for testing torque of satellite through-shaft low-frequency cable |
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Application publication date: 20130116 |