CN106769027B - Small-sized dual input speed reducer structure test macro - Google Patents
Small-sized dual input speed reducer structure test macro Download PDFInfo
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- CN106769027B CN106769027B CN201710219972.3A CN201710219972A CN106769027B CN 106769027 B CN106769027 B CN 106769027B CN 201710219972 A CN201710219972 A CN 201710219972A CN 106769027 B CN106769027 B CN 106769027B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
Abstract
The invention discloses a kind of small-sized dual input speed reducer structure test macro, including motor one, motor one is connected respectively to two input shafts of dual input speed reducer by torque sensor one, motor two-way over torque sensor two;The output shaft of dual input speed reducer is connected by torque sensor three with the input shaft of raising speed gear-box, and the rotation of raising speed gear-box is driven;The output shaft of raising speed gear-box is connected with loading motor axis, drives loading motor rotation.One winding of motor, two windings in series of motor are equivalent to a motor, one tachometer of motor, two tachometer series equivalent of motor are a tachometer, velocity feedback as electric machine controller one, size of current in two machine windings of this method is equal, thus output torque is equal, it realizes the purpose of two motor co- controllings, simplifies torque balance control method, while saving an electric machine controller.
Description
Technical field
The present invention relates to a kind of small-sized dual input speed reducer structure test macros, belong to deceleration mechanism test macro technology neck
Domain.
Background technique
Small-sized dual input speed reducer structure is usually used in adjusting the movement of aerospace craft, and functional reliability directly affects flight
The safety and stability of device, therefore realize instead of the power mechanism of single input using dual input motor driven and work as certain motor driven
When failure, it is still able to maintain normal work.Dual input deceleration mechanism needs to be tested for the property machine work before use of installing
Stability test.
The control method that bi-motor drives jointly teaches control algolithm appropriate frequently with two electric machine controllers, double
The purpose that motor drives jointly, such as Chinese Patent Application No.: CN201510783763.2, the applying date: on November 16th, 2015, specially
Sharp title are as follows: the controller design method of twin drive system, the invention provide a kind of the same of twin drive system
Control program is walked, by establishing the mathematical model of Dual-motors Driving drive system, the mathematical model is based on, devises distributing Shandong
Stick closed-loop obscures dlvision synchrd control.
Speed reducer needs to simulate real load during the test, is at present using magnetic powder brake using more method
It is connected with speed reducer output shaft, changes the DC power supply electric current of magnetic powder brake, achievees the purpose that change braking moment, such as China
Number of patent application: CN201220313813.2, the applying date: on July 2nd, 2012, patent name are as follows: speed reducer performance test system
System, the invention provide a kind of speed reducer Performance Test System, and a side of input torque measurement of rotating speed sensor and prime mover are surveyed
Examination device is connected, and another side of input torque measurement of rotating speed sensor is equipped with tested speed reducer and inputs shaft coupling, output torque
One side of measurement of rotating speed sensor is connected with magnetic powders brake tester, realizes the performance test to speed reducer.
The driving control of dual input speed reducer can be completed by being aided with appropriate algorithm again using bi-motor and two electric machine controllers
System is disadvantageous in that hardware system composition and control algolithm are complex, and debugging work load is big.
Magnetic powder brake is usually used in the load test system of speed reducer, and this loading method is disadvantageous in that,
In loading procedure, energy is consumed in a manner of generating heat, and higher cost.
Summary of the invention
In order to solve above-mentioned deficiency, the present invention provides a kind of small-sized dual input speed reducer structure test macros.
In order to achieve the above object, the present invention is achieved by the following technical solutions:
The present invention is a kind of small-sized dual input speed reducer structure test macro, including the acquisition of computer, interface convertor, data
Device, electric machine controller once, electric machine controller two, motor one, motor two, loading motor, DC power supply, dual input speed reducer
It is that measurand, raising speed gear-box, torque sensor one, torque sensor two, torque sensor are third;The computer is logical
The torque value that data collector acquires torque sensor one, torque sensor two, torque sensor three in real time is crossed, dual input is same as
The transmission efficiency of speed reducer calculates;The computer also passes through interface convertor and electric machine controller one, electric machine controller two
Realize communication function, and the operation completed to electric machine controller one, electric machine controller two controls;Electric machine controller one realizes motor
One and motor two rotation control;Motor one is connected respectively to by torque sensor one, motor two-way over torque sensor two
Two input shafts of dual input speed reducer;The output shaft of dual input speed reducer is defeated by torque sensor three and raising speed gear-box
Enter axis to be connected, drives the rotation of raising speed gear-box;The output of raising speed gear-box is connected with loading motor axis, and loading motor is driven to turn
It is dynamic;The interface convertor is the conversion equipment between two kinds of interfaces;The data collector is computer for acquiring
Torque sensor one, torque sensor two, torque sensor three torque value.
A further improvement of the present invention is that: the raising speed of raising speed gear-box than with the raising speed of dual input speed reducer than equal.
A further improvement of the present invention is that: electric machine controller one and electric machine controller two are two identical direct current generators
The voltage rating of controller, electric machine controller one and electric machine controller two is identical as direct current power source voltage.
A further improvement of the present invention is that: motor one, motor two are two identical direct current generators, motor one, motor
Two voltage rating is the 1/2 of direct current power source voltage;Motor one, the power of motor two and match with electric machine controller one, electricity
Machine one, motor two have tachometer;The output voltage of the tachometer of motor one and the tachometer of motor two in normal speed with
The specified input range of the speed measure feedback of electric machine controller one matches.
A further improvement of the present invention is that: loading motor is direct current generator, and the voltage rating of loading motor is direct current
Source voltage;Loading motor has tachometer, output voltage and electric machine controller of the tachometer of loading motor in normal speed
The specified input range of two speed measure feedback matches.
A further improvement of the present invention is that: DC power supply, electric machine controller one, electric machine controller two, motor one, motor
Two connection relationship are as follows: (+) end, one power input of electric machine controller (+) end, two power input of electric machine controller of DC power supply
(+) end links together;(-) end of DC power supply, one power input of electric machine controller (-) end, two power supply of electric machine controller are defeated
Enter (-) end to link together;The motor control output terminal M1 of electric machine controller one is connected with one winding of motor (+) end;Motor
One winding (-) end is connected with two winding of motor (+) end;Two winding of motor (-) end and the motor control of electric machine controller one export
Terminal M2 is connected;For convenience of adjustment tachometer feedback voltage, especially in the speed measure feedback terminal and tachometer of electric machine controller one
Between two resistance (R1, R2), specific connection relationship be set are as follows: the speed measure feedback terminal S1 of electric machine controller one, resistance R1
One end, resistance R2 one end link together;The other end of resistance R1 is connected with (+) end of one tachometer of motor;Motor one is surveyed
(-) end of fast machine is connected with two tachometer of motor (+) end;Two tachometer of motor (-) end, the other end of resistance R2, motor control
The speed measure feedback terminal S2 of device one links together, and inputs model according to the speed measure feedback of speed measure feedback voltage and electric machine controller one
It encloses, appropriate adjustment resistance R1, R2 value, the input of the speed measure feedback of speed measure feedback voltage and electric machine controller one is made to match;Motor
The motor control output terminal M1 of controller two is connected with loading motor winding (+) end;The motor control of electric machine controller two is defeated
Terminal M2 is connected with loading motor winding (-) end out;The speed measure feedback terminal S1 and loading motor tachometer of electric machine controller two
(+) end be connected;The speed measure feedback terminal S2 of electric machine controller two, (-) end of loading motor tachometer are connected.
Small-sized dual input speed reducer structure test macro of the invention, working principle are as follows: be provided with torque sensor one, torque
Sensor two, torque sensor three are respectively used to measurement dual input acceleration and deceleration input torque and output torque, can accurately measure double
Input the transmission efficiency of acceleration and deceleration;By the parallel connection of the power supply line of electric machine controller one and electric machine controller two, electric machine controller one is controlled
Motor one processed, motor two control the rotation of dual input speed reducer, and electric machine controller two controls loading motor load, at this time loading motor
Working condition is Generator Status, and the size of locked-in torque is controlled by electric machine controller two, while the power generation of motor two passes through
Electric machine controller two feeds back to DC power supply outlet side, for the use of electric machine controller one, according to law of conservation of energy, direct current
Source only needs to provide the power of dual input speed reducer drive loss, thus test macro has power saving function;One winding of motor, motor
Two windings in series are equivalent to a motor, and one tachometer of motor, two tachometer series equivalent of motor are a tachometer, this side
Size of current in two machine windings of method is equal, thus output torque is equal, realizes the purpose that two motors drive jointly, letter
Change torque balance control method, while saving an electric machine controller.
A kind of small-sized dual input speed reducer structure test macro, the test item completed include:
1) transmission efficiency;
2) starting performance is tested;
The transmission efficiency test method is: the speed of electric machine controller one is arranged by interface convertor for computer, to
After dual input speed reducer reaches setting speed, the locked-in torque of electric machine controller two is arranged by interface convertor for computer, surely
Computer reads the reality of torque sensor one, torque sensor two, torque sensor three by data collector after state operation
Value calculates the transmission efficiency of the dual input speed reducer under present speed.
The starting performance test is for testing the starting performance of entire test macro in pre-loaded situation.
Advantageous effects of the invention:
(1), system of the invention is provided with torque sensor one, torque sensor two, torque sensor three, is respectively used to
Dual input acceleration and deceleration input torque and output torque are measured, can accurately measure the transmission efficiency of dual input acceleration and deceleration.
(2), system of the invention is by realizing two motors of dual input speed reducer to two identical direct current generators of series connection
Balanced drive simplifies system design, saves hardware cost.
(3), system of the invention realizes loaded energy by being connected directly two identical electric machine controller power supplys
It recycles, realizes energy-efficient purpose.
(4), the saturated characteristic of the motor loading method proportion of utilization integral controller of system of the invention simulates practical system
System load characteristic, simplifies loading method.
(5), component involved in system of the invention be the market universal product, it can be achieved that system fast construction.
Detailed description of the invention
Fig. 1 is the composition schematic diagram of test macro of the present invention.
Fig. 2 is DC power supply of the present invention, electric machine controller one, the second-class annexation figure of electric machine controller.
Fig. 3 is the internal control functional block diagram of electric machine controller one of the present invention.
Specific embodiment
In order to deepen the understanding of the present invention, present invention work is further retouched in detail below in conjunction with drawings and examples
It states, the embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
As shown in Figure 1, the present invention is, a kind of small-sized dual input speed reducer structure test macro, including computer, interface conversion
Device, data collector, electric machine controller one, electric machine controller two, motor one, motor two, loading motor, DC power supply, lose-lose
Enter speed reducer i.e. measurand, raising speed gear-box, torque sensor one, torque sensor two, torque sensor are third.
The computer acquires torque sensor one, torque sensor two, torque sensor by data collector in real time
Three torque value, the transmission efficiency for dual input speed reducer calculate;The computer also passes through interface convertor and motor control
Device one processed, electric machine controller two realize communication function, and the operation completed to electric machine controller one, electric machine controller two controls;
Electric machine controller one realizes the rotation control of motor one and motor two;Motor one is by torque sensor one, motor two by turning
Square sensor two is connected respectively to two input shafts of dual input speed reducer;The output shaft of dual input speed reducer passes through torque sensing
Device three is connected with the input shaft of raising speed gear-box, drives the rotation of raising speed gear-box;The output shaft and loading motor of raising speed gear-box
Axis is connected, and drives loading motor rotation.
The interface convertor is the conversion equipment between two kinds of interfaces, and selection Ethernet turns CAN bus (control in this example
Device local area network processed, abbreviation CAN bus), computer is connected by Ethernet with interface convertor, and interface convertor passes through CAN
Bus is connected with electric machine controller one and electric machine controller two;The data collector is computer for acquiring torque sensing
Device one, torque sensor two, torque sensor three torque value, data collector using universal serial bus (USB) and calculate
Machine is connected.
The raising speed ratio of the raising speed gear-box is with dual input speed reducer raising speed than equal.
The electric machine controller one and electric machine controller two are two identical DC motor controllers, electric machine controller one
Identical as direct current power source voltage with the voltage rating of electric machine controller two, in this example, voltage is 48 volts, one He of electric machine controller
Electric machine controller device two has the function of that four quadrant running (has positive and negative rotation control and positive and negative braking function, usual motor control
Device is provided with this function), the electric machine controller one and electric machine controller two have CANopen communications protocol.
The motor one, motor two are two identical direct current generators, and motor one, the selection of motor two need to meet to be wanted as follows
It asks:
1) voltage rating is the 1/2 of direct current power source voltage, is 24 volts in this example;
2) motor one, the power of motor two and match with electric machine controller one;
3) motor one, motor two and meet tachometer in rated speed equipped with tachometer as velocity feedback element
The specified input of speed measure feedback of output voltage and electric machine controller one matches.
The loading motor is direct current generator, and it is 48 in this example that the voltage rating of loading motor, which is direct current power source voltage,
Volt;The loading motor has tachometer, output voltage and electric machine controller of the tachometer of loading motor in normal speed
The specified input range of two speed measure feedback matches.
As shown in Fig. 2, the connection of the DC power supply, electric machine controller one, electric machine controller two, motor one, motor two
Relationship are as follows: (+) end, one power input of electric machine controller (+) end, two power input of electric machine controller (+) end of DC power supply connect
It is connected together;(-) end, one power input of electric machine controller (-) end, two power input of electric machine controller (-) end of DC power supply
It links together;The motor control output terminal M1 of electric machine controller one is connected with one winding of motor (+) end;One winding of motor
(-) end is connected with two winding of motor (+) end;The motor control output terminal M2 at two winding of motor (-) end and electric machine controller one
It is connected;For convenience of adjustment tachometer feedback voltage, especially set between the speed measure feedback terminal and tachometer of electric machine controller one
Set two resistance (R1, R2), specific connection relationship are as follows: the speed measure feedback terminal S1 of electric machine controller one, one end of resistance R1, electricity
One end of resistance R2 links together;The other end of resistance R1 is connected with (+) end of one tachometer of motor;One tachometer of motor
(-) end is connected with two tachometer of motor (+) end;Two tachometer of motor (-) end, the other end of resistance R2, electric machine controller one
Speed measure feedback terminal S2 links together, and according to the speed measure feedback input range of speed measure feedback voltage and electric machine controller one, fits
When the resistance value of selection resistance R1, R2, the input of the speed measure feedback of speed measure feedback voltage and electric machine controller one is made to match;Motor control
The motor control output terminal M1 of device two processed is connected with loading motor winding (+) end;The motor control of electric machine controller two exports
Terminal M2 is connected with loading motor winding (-) end;The speed measure feedback terminal S1 of electric machine controller two and loading motor tachometer
(+) end is connected;The speed measure feedback terminal S2 of electric machine controller two, (-) end of loading motor tachometer are connected.
Small-sized dual input speed reducer structure test macro of the invention, working principle are as follows: be provided with torque sensor one, torque
Sensor two, torque sensor three are respectively used to measurement dual input acceleration and deceleration input torque and output torque, can accurately measure double
Input the transmission efficiency of acceleration and deceleration;By the parallel connection of the power supply line of electric machine controller one and electric machine controller two, electric machine controller one is controlled
Motor one processed, motor two control the rotation of dual input speed reducer, and electric machine controller two controls loading motor load, at this time loading motor
Working condition be Generator Status, and the size of locked-in torque is controlled by electric machine controller two, while the power generation of motor two is logical
It crosses electric machine controller two and feeds back to DC power supply outlet side, for the use of electric machine controller one, according to law of conservation of energy, direct current
Power supply only needs to provide the power of dual input speed reducer drive loss, thus test macro has power saving function;One winding of motor, electricity
Two windings in series of machine is equivalent to a motor, and one tachometer of motor, two tachometer series equivalent of motor are a tachometer, as
The velocity feedback of electric machine controller one, the size of current in two machine windings of this method is equal, thus output torque is equal,
It realizes the purpose of two motor co- controllings, simplifies torque balance control method, while saving an electric machine controller.
A kind of small-sized dual input speed reducer structure test macro, the test item to be completed include:
1) transmission efficiency;
2) starting performance is tested.
As shown in the internal control functional block diagram of Fig. 3 electric machine controller one, the internal control functional block of electric machine controller two
Scheme identical with motor control one;Including initially setting, setting value, velocity correction, velocity feedback, selection switchs, electric current limits
System, current feedback and current correction etc.;Initial setting, setting value data source be computer by interface convertor transmission come
Data;Described is initially set according to different testing requirements to selection switch and current limit that is, motor control
In system, the torque that electric current corresponds to motor is set;The velocity correction and current correction is all made of proportional plus integral control side
Method, complete motor control during motor speed and electric current control.
The transmission efficiency test method are as follows:
1) initially setting electric machine controller one is speed control mode, i.e. the selection of electric machine controller one switchs choosing
Select position 2;Electric machine controller two is set as torque operating mode, the i.e. selection of electric machine controller two switch selection position 1;
2) electric machine controller one is enabled, setting value is the 5% of one normal speed of motor;
3) after waiting actual speed to reach setting value, electric machine controller two is enabled;
4) loading curve needed by dual input speed reducer is by two torque settings value of computer settings electric machine controller;
5) after stable operation, computer reads torque sensor one, torque sensor two, torque sensor three
It is worth and records;
6) also can according to need by the 5%(of one normal speed of motor and determine increased velocity magnitude) speed increase motor
The speed setting value of controller one;
7) step 5) is gone to, until the speed setting value of electric machine controller one reaches 100%, test terminates.
The starting performance test job principle are as follows: motor one, motor two are in driving dual input speed reducer starting
Before, the pre-loaded torque of loading motor, simulate actual loading situation, test transmission system under locked-in torque by
Stop to starting the time required for normal speed.
The loading method of the starting performance test are as follows: if motor driver two is set as torque mode, and pre-
First locked-in torque may cause loading motor and drive dual input speed reducer anti-then since driving motor one, motor two are also inactive
It is unable to test to rotation, it is as follows that the present invention provides a kind of loading method principle: setting velocity mode for electric machine controller two,
Current limit is set as the corresponding size of current of desired locked-in torque, and speed setting value 0 is enabled in motor driver two
Afterwards, at this time due to speed setting value 0, loading motor is not rotated, and locked-in torque is also almost 0, is controlled to electric machine controller one
When motor one processed, two test starting of motor, motor one, motor two drive the rotation of dual input speed reducer, and dual input speed reducer drives
Loading motor rotation, when loading motor just starts turning, it is poor that the speed setting value and velocity feedback of electric machine controller two exist
The proportional plus integral control output of value, two velocity correction of electric machine controller increases sharply and reaches saturation state, speed control two
Speed control be equivalent to opened loop control, practical control model is current control, and loading motor actual torque is electric current at this time
Corresponding torque value is limited, quickly (usual electric machine controller is generally in 13 milliseconds of response times) due to current control speed, because
This realizes quickly load as motor one, motor two rotate, and simulates actual condition.
The starting performance testing procedure are as follows:
1) electric machine controller one is initially set:
A) speed control mode, i.e. the selection switch selection position 2 of electric machine controller one;
B) current limit is the current value (i.e. corresponding torque value) that the test of dual input speed reducer needs
2) electric machine controller two is initially set:
A) speed control mode, i.e. the selection switch selection position 2 of electric machine controller two;
B) current limit is current value, that is, corresponding torque value that the load of dual input speed reducer needs;
3) speed setting value of electric machine controller two is set as 0;
4) electric machine controller two is enabled;
5) one speed setting value of electric machine controller is set as the maximum speed that the test of dual input speed reducer needs;
6) electric machine controller one is enabled, simultaneous computer starts timing;
7) whether computer reaches setting value by the actual speed that interface convertor continuously reads motor control one,
When reaching setting, stop timing, is the starting time between clocking, test terminates.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (5)
1. small-sized dual input speed reducer structure test macro, it is characterised in that: including computer, interface convertor, data collector,
Electric machine controller one, electric machine controller two, motor one, motor two, loading motor, DC power supply, dual input speed reducer, raising speed tooth
Roller box, torque sensor one, torque sensor two, torque sensor three, the computer are acquired in real time by data collector
Torque sensor one, torque sensor two, torque sensor three torque value, based on the transmission efficiency of dual input speed reducer
It calculates, the computer also passes through interface convertor and electric machine controller one, electric machine controller two realize communication function, and completion pair
The operation control of electric machine controller one, electric machine controller two, electric machine controller one realize the rotation control of motor one and motor two,
Motor one is connected respectively to two inputs of dual input speed reducer by torque sensor one, motor two-way over torque sensor two
Axis;The output shaft of dual input speed reducer is connected by torque sensor three with the input shaft of raising speed gear-box, and raising speed gear is driven
Case rotation, the output shaft of raising speed gear-box are connected with loading motor axis, drive loading motor rotation, one He of electric machine controller
Electric machine controller two is two identical DC motor controllers, the voltage rating of electric machine controller one and motor control two and straight
Stream supply voltage is identical, and electric machine controller one and electric machine controller two have the function of four quadrant running, the electric machine controller one
Has CANopen communications protocol with electric machine controller two.
2. small-sized dual input speed reducer structure test macro according to claim 1, it is characterised in that: the raising speed gear-box
Raising speed than with the raising speed of dual input speed reducer than equal.
3. small-sized dual input speed reducer structure test macro according to claim 1, it is characterised in that: the motor one, motor
Two be two identical direct current generators, motor one, motor two voltage rating be direct current power source voltage 1/2;Motor one, motor
Two power and match with electric machine controller one;Motor one, motor two are furnished with tachometer as velocity feedback element, and meet
The speed measure feedback of the tachometer of motor one and the tachometer of motor two output voltage in rated speed and electric machine controller one
Specified input matches.
4. small-sized dual input speed reducer structure test macro according to claim 1, it is characterised in that: the loading motor is straight
Galvanic electricity machine, the voltage rating of loading motor are direct current power source voltage, and the loading motor has tachometer, and loading motor tests the speed
Output voltage of the machine in normal speed and the specified input range of speed measure feedback of electric machine controller two match.
5. small-sized dual input speed reducer structure test macro according to claim 1, it is characterised in that: the electric machine controller
One, the connection relationship of electric machine controller two, motor one, motor two are as follows: (+) end of DC power supply, one power supply of electric machine controller are defeated
Enter (+) end, two power input of electric machine controller (+) end to link together;(-) end of DC power supply, one power supply of electric machine controller
Input (-) end, two power input of electric machine controller (-) end link together;The motor control output terminal of electric machine controller one
M1 is connected with one winding of motor (+) end;One winding of motor (-) end is connected with two winding of motor (+) end;Two winding of motor (-) end
It is connected with the motor control output terminal M2 of electric machine controller one;For convenience of adjustment tachometer feedback voltage, especially in motor control
Two resistance (R1, R2), specific connection relationship are as follows: electric machine controller are set between the speed measure feedback terminal and tachometer of device one processed
One speed measure feedback terminal S1, one end of resistance R1, resistance R2 one end link together;The other end and motor one of resistance R1
(+) end of tachometer is connected;(-) end of one tachometer of motor is connected with two tachometer of motor (+) end;Two tachometer (-) of motor
End, the other end of resistance R2, electric machine controller one speed measure feedback terminal S2 link together, according to speed measure feedback voltage and electricity
The speed measure feedback input range of machine controller one, the appropriate resistance value for selecting resistance R1, R2, makes speed measure feedback voltage and motor control
The speed measure feedback input of device one matches;Motor control output terminal M1 and loading motor winding (+) end of electric machine controller two
It is connected;The motor control output terminal M2 of electric machine controller two is connected with loading motor winding (-) end;The survey of electric machine controller two
Fast feedback terminal S1 is connected with (+) end of loading motor tachometer;Speed measure feedback terminal S2, the loading motor of electric machine controller two
(-) end of tachometer is connected.
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SU1670471A1 (en) * | 1989-07-24 | 1991-08-15 | Могилевский Машиностроительный Институт | Test rig for dynamic testing of reducers |
CN101211160A (en) * | 2006-12-30 | 2008-07-02 | 南京理工大学 | Servo-system analog loading control device |
US8070638B2 (en) * | 2009-03-30 | 2011-12-06 | GM Global Technology Operations LLC | Dual input planetary final drive |
CN202648944U (en) * | 2012-07-02 | 2013-01-02 | 杭州誉球机械有限公司 | Speed reducer performance test system |
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CN204705479U (en) * | 2015-05-05 | 2015-10-14 | 湖北精川智能装备股份有限公司 | The adjustment of a kind of speed reduction unit main cone bearing clearance and moment inspecting platform |
CN105262379B (en) * | 2015-11-16 | 2018-12-28 | 厦门理工学院 | The controller design method of twin drive system |
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