CN115962959A - Mute rotary loading mechanism and control method thereof - Google Patents
Mute rotary loading mechanism and control method thereof Download PDFInfo
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- CN115962959A CN115962959A CN202310036817.3A CN202310036817A CN115962959A CN 115962959 A CN115962959 A CN 115962959A CN 202310036817 A CN202310036817 A CN 202310036817A CN 115962959 A CN115962959 A CN 115962959A
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Abstract
The invention relates to the technical field of automobile abnormal sound testing equipment, and discloses a mute rotary loading mechanism and a control method thereof, wherein the mute rotary loading mechanism comprises a power part, a detection part and a control part, wherein the power part is connected with an automobile steering gear and is used for applying a load to the automobile steering gear as the load; the detection component is used for monitoring the magnitude of a load value provided by the power component in the test process in real time; and the control component is used for controlling the running states of the power component, the detection component and the automobile steering engine and adjusting the load torque output by the power component. The invention has the advantages of simplifying the structure of the test equipment, reducing the difficulty of test operation, improving the universality of the test equipment and providing a silent test environment to improve the accuracy of the abnormal sound test result of the automobile steering engine.
Description
Technical Field
The invention relates to the technical field of automobile abnormal sound testing equipment, in particular to a mute rotary loading mechanism and a control method thereof.
Background
With the development and breakthrough of automobile technology, a situation of popularization of automobiles with one person and one vehicle is gradually formed at present, and with the increase of the quantity of automobiles kept, various problems of automobiles in the use process are gradually exposed, wherein abnormal sound of an automobile steering gear is the most common fault mode of a steering system, which not only easily causes sense discomfort and tension of a driver in the driving process, but also can be changed from small problems to large problems affecting the reliability and safety of the whole automobile under extreme conditions. Therefore, finding out the cause of the abnormal sound of the steering gear and solving the problem is a powerful guarantee for improving the driving texture and the safety of the automobile, and at present, a plurality of research organizations have gradually developed researches on the abnormal sound of the steering gear of the automobile, and the researches are also used for researching the cause and possible consequences of the abnormal sound generated by the steering gear.
In the conventional research mode, a steering engine system of an automobile is generally built, and the whole steering process of the automobile is simulated by applying steering force by using other power devices, so that the size and the position of abnormal sound are detected, the reason and the influence of the abnormal sound are researched, but in the mode, part of noise is generated in the test process by adopting power device equipment, so that the interference on the acquisition of the abnormal sound of the steering engine is caused, and the accuracy of the test result is finally influenced. Therefore, a new testing device is needed to provide a silent testing environment so as to ensure the accuracy of the testing result.
Disclosure of Invention
The invention aims to provide a mute rotary loading mechanism and a control method thereof to provide a mute test environment so as to improve the precision of an abnormal sound test result of an automobile steering gear.
In order to achieve the purpose, the invention adopts the following technical scheme: a mute rotary loading mechanism comprises a power part, a detection part and a control part, wherein the power part is connected with an automobile steering gear and is used for applying a load to the automobile steering gear as the load; the detection component is used for monitoring the load value provided by the power component in the test process in real time; and the control component is used for controlling the running states of the power component, the detection component and the automobile steering engine and adjusting the load torque output by the power component.
The principle and the advantages of the scheme are as follows: in practical application, the components are utilized to form a rotary loading mechanism to provide steering load torque for the automobile steering machine, so that abnormal sound of the automobile steering machine in the steering process can be tested and researched conveniently. The power component is used for providing preset load torque for the automobile steering engine, meanwhile, the detection component is used for detecting the load torque in real time, and the load torque output by the power component is dynamically adjusted. Compared with the prior art, the scheme has the advantages that a larger steering load torque can be provided, so that the abnormal sound test range of the automobile steering engine is larger, the test precision is improved, and on the other hand, the loading mechanism in the scheme has the mute performance, can provide the load torque in the mute state, and avoids the interference of other noises to the test; meanwhile, the torque resistance provided by the scheme can be dynamically adjusted, compensated and corrected, so that the load torque acting on the automobile steering engine can be constantly kept as a preset value, the precision of a basic variable is controlled, and the accuracy of a test result is improved. More importantly, the loading mechanism in the scheme is simple in overall structure, simple in installation and disassembly operation, capable of reducing the difficulty of test operation, high in universality of structure and suitable for testing of steering gears of most vehicle types in the market, and therefore the loading mechanism is convenient to popularize and apply.
Preferably, as a modification, the power unit includes a magnetic particle brake, and the magnetic particle brake is connected to a steering column of the automobile steering gear through an intermediate shaft, for providing a left-turn or right-turn steering load to the automobile steering gear.
Preferably, as an improvement, the detecting component includes a torque sensor for detecting an actual torque applied to the steering gear of the vehicle, and dynamically adjusting the load torque output by the power component according to the detection result.
Preferably, as an improvement, the control component comprises an electrical cabinet and an upper computer, wherein the electrical cabinet is used for providing power required by testing for each testing component; the upper computer is used for controlling the running state of each test component and adjusting the magnitude of the load torque in real time.
Preferably, as an improvement, the control device further comprises a feedback regulation module, wherein the feedback regulation module comprises a PID controller for compensating and correcting the load torque output by the power component according to the magnitude of the detected load torque value.
The scheme also provides a mute rotary loading mechanism control method applied to the mute rotary loading mechanism, which comprises the following steps:
s1, installing a test loop required by an operation condition, and connecting an automobile steering gear and a magnetic powder brake;
s2, starting the electrical cabinet and the upper computer, performing a test run test after the test loop completes power-on communication, and outputting a magnetic powder brake according to a preset torque value to provide torsional resistance for the automobile steering engine;
and S3, collecting sound signals of a plurality of positions on the automobile steering gear by using a sound collector, and carrying out comprehensive analysis on the collected sound signals to evaluate the silencing performance of the automobile steering gear.
Preferably, as an improvement, the operation conditions include a normal operation condition of the steering engine and a quick reversing condition of the steering engine.
Preferably, as a modification, when the sound signal is collected, the sampling frequency of the sound collector is adjusted to be 48Hz.
Preferably, as an improvement, in the test process, a torque value received by the automobile steering engine is detected in real time by using a torque sensor, and is fed back to the feedback adjusting module to be compared with a preset torque value, and finally, dynamic compensation correction is performed on the torque value output by the magnetic powder brake.
Preferably, as an improvement, in the test process, a torque change curve is formed by collecting real-time torque values at different speeds and under different load torque values, and the torque change curve is displayed in the upper computer in real time.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a mute rotary loading mechanism according to the present invention.
Fig. 2 is a diagram of a first embodiment of a mute rotary loading mechanism according to the present invention.
Fig. 3 is a schematic diagram of a test point of an embodiment of a mute rotary loading mechanism according to the present invention.
Fig. 4 is a schematic flow chart illustrating a control method of a mute rotary loading mechanism according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of sound data of a test point according to an embodiment of a mute rotation loading mechanism of the present invention.
Fig. 6 is a graph showing a load variation of an embodiment of a silent rotational loading mechanism according to the present invention.
Fig. 7 is a schematic view of a testing process of a silent rotary loading mechanism according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numbers in the drawings of the specification include: the automobile steering device comprises an automobile steering machine 1, a power component 2, a detection component 3, a control component 4, a feedback adjusting module 5, a magnetic powder brake 6, an auxiliary motor 7 and a test point 8.
The first embodiment is as follows:
this embodiment is substantially as shown in figures 1 and 2: a mute rotary loading mechanism comprises a power part 2, a detection part 3 and a control part 4, wherein the power part 2 is connected with an automobile steering gear 1 and is used for applying a load to the automobile steering gear 1 as the load; specifically, the power component 2 comprises a magnetic powder brake 6, is connected with a steering column of the automobile steering gear 1 through an intermediate shaft, and applies rated or time-varying load to the steering column of the automobile steering gear 1, so that an auxiliary motor 7 arranged on the column works with load; magnetic powder brake 6 has that response speed is fast, moreover, the steam generator is simple in structure, it is pollution-free, noiselessness, no impact vibration, advantages such as energy saving, consequently, select magnetic powder brake 6 in this scheme as power component 2, not only can simplify whole loading mechanism's structure, make loading mechanism be convenient for install, also can the at utmost be applicable to most motorcycle type simultaneously, improve loading mechanism's commonality, and simultaneously, also because of it possesses good silence performance, can not produce interference noise in the test procedure, thereby the precision of test result has effectively been ensured.
The detection component 3 is used for monitoring the load value provided by the power component 2 in the test process in real time; specifically, the detection component 3 comprises a torque sensor, is installed at the front end of the automobile steering gear 1, and is used for detecting the actual torque applied to the automobile steering gear 1;
the control component 4 is used for controlling the running states of the power component 2, the detection component 3 and the automobile steering engine 1 and adjusting the load torque output by the power component 2; specifically, the control component 4 comprises an electrical cabinet and an upper computer, wherein the electrical cabinet is used for providing power energy required by the test and ensuring the basic conditions of the test; the upper computer is used for controlling the running state of each part in the test loop and adjusting the torque value output by the magnetic powder brake 6;
the magnetic powder brake device further comprises a feedback adjusting module 5, specifically comprises a PID controller connected with the magnetic powder brake 6, and is used for compensating and correcting the torque value output by the magnetic powder brake 6 according to the detected load torque value, so that the torque value is always kept at a preset value.
As shown in fig. 4, the present disclosure further provides a mute rotary loading mechanism control method applied in the mute rotary loading mechanism, including the following steps:
s1, installing a test loop required by an operation condition, and connecting an automobile steering gear 1 and a magnetic powder brake 6;
s2, starting the electrical cabinet and the upper computer, performing a test run test after the test loop completes power-on communication, and outputting the magnetic powder brake 6 to provide torsional resistance for the automobile steering engine 1 according to a preset torque value;
and S3, collecting sound signals of a plurality of positions on the automobile steering gear 1 by using a sound collector, and carrying out comprehensive analysis on the collected sound signals to evaluate the mute performance of the automobile steering gear 1.
Specifically, in this scheme, there are 2 kinds of operating condition of auto steering machine 1, including the normal operating condition of steering machine and the quick switching-over operating condition of steering machine for the abnormal sound of test steering machine under different operating condition, thereby the silence performance of aassessment steering machine.
As shown in fig. 3, a test point 8 is selected on the automobile steering gear 1, namely the auxiliary motor 7 of the automobile steering gear 1, and a sound collection example, such as a microphone, is installed at a position 300mm away from the test point; the mute performance of the automobile steering gear 1 is evaluated by using the sound signal of the microphone collection test point 8 in the test process and analyzing the collected sound signal subsequently. Specifically, the peak noise of the test point 8 should not exceed 53dB (a), and no abnormal noise should occur.
As shown in fig. 5, the peak value of the sound signal at the test point 8 is 53dB (a).
In the testing process, real-time torque values at different speeds and under different load torque values can be collected to form a torque change curve, and the torque change curve is displayed in the upper computer in real time, so that the change condition of the torque is clearer, and testers can conveniently master the testing rhythm.
The specific implementation process of this embodiment is as follows:
firstly, a test loop of the running condition of the automobile steering gear 1 is installed, a steering column of the automobile steering gear 1 and a magnetic powder brake 6 are connected together through an intermediate shaft, a test point 8 is selected on the steering gear, namely an auxiliary motor 7 of the automobile steering gear 1, and then a microphone is installed at a position 300mm away from the test point to collect a sound signal in the test process.
Then, firstly, carrying out communication test, connecting the upper computer with the magnetic powder brake 6, and confirming whether the magnetic powder brake 6 is successfully communicated or not and whether loading can be controlled or not; setting the initial speed to 10rad/min and the load force to 100Nm, carrying out pretest, and monitoring whether abnormal sound exists in the running process of the loading mechanism. After the pretest is finished, setting test parameters such as load force, speed, angle, repetition times and the like required by the test, and starting formal test.
As shown in fig. 7, the electrical cabinet and the upper computer are started, a load torque file with a preset torque value is guided into the upper computer, after the load torque signal conversion is completed, the magnetic powder vibrator is controlled to output a preset load torque to the automobile steering gear 1, the steering gear respectively operates the normal operation condition of the steering gear and the quick reversing condition of the steering gear under the action of the control part 4, in the working process of the steering gear, a microphone is arranged to collect a sound signal of a test point 8 of the auxiliary motor 7 at a sampling frequency of 48KHz, finally, the collected sound signal is analyzed, the mute performance of the automobile steering gear 1 is evaluated according to the size of the sound signal of the test point 8, namely, whether the auxiliary motor 7 of the automobile steering gear 1 has abnormal sound during the operation is detected.
On the other hand, in the testing process, the torque value received by the automobile steering gear 1 is detected in real time by using the arranged torque sensor, then the detected torque value is fed back to the PID controller to be compared with the preset torque, and if the detected torque value does not accord with the preset torque, the dynamic compensation correction is carried out on the torque value output by the magnetic powder brake 6, so that the torque value is always kept at the preset value. The torque sensor monitors whether the force meets the test requirement in real time and whether the torque is abnormally increased or not, and transmits the force back to the PID control module in real time to compensate and correct the load force in real time and display the load force in real time. And automatically storing and outputting test data after the test is finished.
Meanwhile, the loading mechanism is mainly the magnetic powder brake 6, so that the loading mechanism is good in silence and is directly connected with the steering engine without other intermediate conversion mechanisms, and noise is not generated in the whole load loading process. Moreover, the loading mechanism can test time-varying load, the testing speed is set to be 10rad/min, the angle is set to be 400 degrees, the initial load force is set to be 10Nm, the middle load force is set to be 20Nm at 360 degrees, the load force is set to be 60Nm after the test is finished, the number of times of repetition is 10, and the test is started. In the test process, the torque sensor monitors whether the torque load meets the test requirement in real time, transmits the torque load back to the PID control module in real time, performs real-time torque value time-varying compensation correction, and displays the load torque in real time, as shown in the attached figure 6.
With the satisfaction of the basic travel traffic function of the automobile for people, more and more consumers turn the center of gravity of the automobile from original durability, economy and the like to the aspects of driving comfort, safety and the like of the automobile when purchasing the automobile, particularly for some consumers, the consumers especially see the mute performance of the automobile, namely the effect of processing noise in various aspects such as tire noise, wind noise, abnormal sound and the like in the driving process of the automobile. Because the steering machine of the automobile is a conventional mechanical connection structure, some mechanical parts are difficult to rub and collide in the steering process to generate abnormal sound, and therefore the abnormal sound of the steering machine also becomes the most common fault of the steering system, which not only affects the driving texture of a user, but also may affect the reliability and safety of the automobile to a great extent. Therefore, at present, the research work on the abnormal sound of the automobile steering gear 1 is more and more intensive and emphasized, and in the conventional test equipment, generally adopted devices for providing power for the steering gear are not completely silent, and generate partial interference noise, so that the result of the abnormal sound test on the steering gear is influenced.
In the scheme, a new mute loading mechanism is specially developed aiming at the problems, and is mainly assembled and built by adopting parts or devices with mute performance, for example, the magnetic powder brake 6 is used as the power part 2, and the magnetic powder brake 6 has the advantages of high response speed, simple structure, no pollution, no noise, no impact vibration, energy conservation and the like, so that the interference noise of equipment can be reduced to a certain extent, and the accuracy of a test result is improved; meanwhile, the equipment adopted in the scheme is simple in structure and convenient to install, so that the difficulty in abnormal sound testing operation is reduced, and meanwhile, the whole universality is high, and the equipment can be suitable for most vehicle types; on the other hand, can also come the 6 torsional resistance size of real time control magnetic powder brake through the host computer in this scheme, steerable load torque value that provides different, thereby make the test to auto steering 1 more comprehensive, and can also utilize torque sensor to carry out real-time on-line monitoring to the torque value that auto steering 1 received, thereby feedback to the front end and utilize the PID controller to compensate the correction, make the moment of torsion be the default all the time, thereby accurate control experiment variable improves the precision of test result.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A silence rotary loading mechanism is characterized in that: the device comprises a power part, a detection part and a control part, wherein the power part is connected with an automobile steering machine and is used for applying a load to the automobile steering machine as the load; the detection component is used for monitoring the magnitude of a load value provided by the power component in the test process in real time; and the control component is used for controlling the running states of the power component, the detection component and the automobile steering engine and adjusting the load torque output by the power component.
2. A silent rotary loading mechanism as claimed in claim 1, wherein: the power component comprises a magnetic powder brake, and the magnetic powder brake is connected with a steering column of the automobile steering machine through an intermediate shaft and is used for providing steering load for the automobile steering machine to turn left or right.
3. A silent rotary loading mechanism as claimed in claim 1, wherein: the detection part comprises a torque sensor and is used for detecting the actual torque applied to the automobile steering engine and dynamically adjusting the load torque output by the power part according to the detection result.
4. A silent rotary loading mechanism as claimed in claim 1, wherein: the control component comprises an electrical cabinet and an upper computer, and the electrical cabinet is used for providing power required by testing for each testing component; the upper computer is used for controlling the running state of each test component and adjusting the magnitude of the load torque in real time.
5. A silent rotary loading mechanism as claimed in claim 1, wherein: the feedback regulation module comprises a PID controller and is used for compensating and correcting the load torque output by the power component according to the detected load torque value.
6. A silent rotary loading mechanism control method applied to a silent rotary loading mechanism according to any one of claims 1 to 5, wherein: the method comprises the following steps:
s1, installing a test loop required by an operation condition, and connecting an automobile steering gear and a magnetic powder brake;
s2, starting the electrical cabinet and the upper computer, performing a test run test after the test loop completes power-on communication, and outputting a magnetic powder brake according to a preset torque value to provide torsional resistance for the automobile steering engine;
and S3, collecting sound signals of a plurality of positions on the automobile steering gear by using a sound collector, and carrying out comprehensive analysis on the collected sound signals to evaluate the silencing performance of the automobile steering gear.
7. The method for controlling a silent rotary loading mechanism according to claim 6, wherein: the operation working conditions comprise a normal operation working condition of the steering engine and a quick reversing working condition of the steering engine.
8. The method for controlling a silent rotary loading mechanism according to claim 6, wherein: when the sound signal is collected, the sampling frequency of the sound collector is adjusted to be 48Hz.
9. The method for controlling a silent rotary loading mechanism according to claim 6, wherein: in the testing process, a torque value received by the automobile steering engine is detected in real time by using the torque sensor, and is fed back to the feedback adjusting module to be compared with a preset torque value, and finally, dynamic compensation correction is carried out on the torque value output by the magnetic powder brake.
10. The method for controlling a silent rotary loading mechanism according to claim 6, wherein: in the testing process, a torque change curve is formed by collecting real-time torque values at different speeds and under different load torque values, and the torque change curve is displayed in the upper computer in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310036817.3A CN115962959A (en) | 2023-01-10 | 2023-01-10 | Mute rotary loading mechanism and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310036817.3A CN115962959A (en) | 2023-01-10 | 2023-01-10 | Mute rotary loading mechanism and control method thereof |
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| CN115962959A true CN115962959A (en) | 2023-04-14 |
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| CN202310036817.3A Pending CN115962959A (en) | 2023-01-10 | 2023-01-10 | Mute rotary loading mechanism and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117330331A (en) * | 2023-10-30 | 2024-01-02 | 南方(韶关)智能网联新能源汽车试验检测中心有限公司 | Intelligent driving test platform system |
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- 2023-01-10 CN CN202310036817.3A patent/CN115962959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117330331A (en) * | 2023-10-30 | 2024-01-02 | 南方(韶关)智能网联新能源汽车试验检测中心有限公司 | Intelligent driving test platform system |
| CN117330331B (en) * | 2023-10-30 | 2024-03-12 | 南方(韶关)智能网联新能源汽车试验检测中心有限公司 | Intelligent driving test platform system |
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