CN111855175A - Damping test equipment and control system thereof - Google Patents
Damping test equipment and control system thereof Download PDFInfo
- Publication number
- CN111855175A CN111855175A CN202010682268.3A CN202010682268A CN111855175A CN 111855175 A CN111855175 A CN 111855175A CN 202010682268 A CN202010682268 A CN 202010682268A CN 111855175 A CN111855175 A CN 111855175A
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- hydraulic actuator
- damping
- plate
- damping test
- displacement sensor
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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
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
Abstract
The invention discloses a damping test device and a control system thereof, which comprise a base, a hydraulic actuator, an adapter, a lower plate, an elastic assembly, an upper plate and a top plate which are sequentially arranged from bottom to top, wherein a support column and a guide rod are vertically and fixedly arranged between the base and the top plate, and the lower plate and the upper plate are sleeved on the guide rod; the hydraulic actuator is characterized in that a first displacement sensor is arranged on a piston rod of the hydraulic actuator, the adapter is arranged on the upper side of the piston rod of the hydraulic actuator, and a force measuring sensor is arranged between the adapter and the lower plate. The method can simulate the time-varying vibration characteristic of the vehicle more truly, and provides technical support for optimizing and improving the time-varying vibration damping performance characteristic of the vehicle.
Description
Technical Field
The invention relates to the technical field of damping tests, in particular to damping test equipment and a control system thereof.
Background
At present, in the field of automobiles, mechanical property assessment tests on parts or whole automobiles are generally related assessment performance tests according to related requirements of QC standards. However, with the advance of technology and the development of the automobile field, people gradually recognize that the design of the automobile is a system engineering, and the individual part examination test is not the design requirement for the engineering vehicle. In order to design a vehicle with excellent performance, each relevant design parameter needs to be considered in the actual design process. Because the change of each design parameter may affect the test performance and the whole vehicle performance of the part, it is very important how to better perform the examination and verification test on the design of the part and the mechanical performance thereof under the influence of variable parameters.
The performance of the vehicle vibration reduction system has important influences on improving the riding comfort of people in the vehicle, reducing the noise in the vehicle, improving the stability of the vehicle body and prolonging the service cycle of the vehicle. In particular, for vehicles with special applications, it is important to improve the stability of the vehicle body.
In order to obtain the accurate vibration damping performance characteristics of vehicles, researches on vehicle vibration damping test methods and test equipment are actively carried out at home and abroad. However, the research on the vibration damping performance characteristics of the whole vehicle still stays in the aspect of simulation, and the research on related matched test equipment lags behind, so that the use requirements of vehicles with certain special purposes are seriously influenced. For example, some vehicles equipped with precision instruments have very high requirements on the smoothness and stability of the vehicle body during the driving process of the vehicle. Therefore, the related test equipment capable of simulating similar technical requirements is urgently needed in China at present.
Disclosure of Invention
The invention aims to provide damping test equipment and a control system thereof, which can simulate the time-varying vibration characteristics of a vehicle more truly and provide technical support for optimizing and improving the time-varying vibration damping performance characteristics of the vehicle.
In order to solve the technical problems, the invention provides damping test equipment and a control system thereof, which comprise a base, a hydraulic actuator, a switching piece, a lower plate, an elastic component, an upper plate and a top plate which are sequentially arranged from bottom to top, wherein a support column and a guide rod are vertically and fixedly arranged between the base and the top plate, and the lower plate and the upper plate are sleeved on the guide rod;
The hydraulic actuator is characterized in that a first displacement sensor is arranged on a piston rod of the hydraulic actuator, the adapter is arranged on the upper side of the piston rod of the hydraulic actuator, and a force measuring sensor is arranged between the adapter and the lower plate.
Preferably, the guide rod has a plurality of guide rods, and the plurality of guide rods are symmetrically arranged with respect to the hydraulic actuator.
Preferably, the elastic assembly comprises an upper spring seat, a spring and a lower spring seat, the spring is located between the upper spring seat and the lower spring seat, the spring is sleeved on the guide rod, and the elastic assembly is provided with two groups.
Preferably, a time-varying damping device is further disposed between the upper plate and the lower plate.
Preferably, the time-varying damping means is located between the two resilient assemblies.
Preferably, a second displacement sensor is disposed between the upper plate and the lower plate.
Preferably, a counterweight is arranged on the upper plate.
Preferably, a third displacement sensor is provided between the upper plate and the top plate.
Preferably, the base is provided with a vibration isolation device.
Preferably, the number of the supporting columns is two, and the two supporting columns are symmetrically arranged relative to the hydraulic actuator.
The invention also discloses a control system of the damping test equipment, which is based on the damping test equipment and comprises the following components:
the first control unit is connected with the hydraulic actuator to control the work of the hydraulic actuator, and the first control unit is connected with the load cell to acquire a measurement signal of the load cell;
a second control unit connected with a time-varying damping device to control the operation of the time-varying damping device;
and the data acquisition and analysis module is connected with the first displacement sensor and the second displacement sensor to acquire the measurement data of the sensors, and is respectively connected with the first control unit and the second control unit.
The invention has the beneficial effects that:
1. the invention can simulate the static load stress condition of the automobile under different road conditions by changing the power output of the hydraulic actuator and the material of the non-metallic material of the adapter, the force transducer can detect the load applied by the hydraulic actuator, and the first displacement transducer can detect the displacement of the lower plate.
2. The invention can simulate the time-varying vibration characteristic of the vehicle more truly, provides technical support for optimizing and improving the time-varying vibration damping performance characteristic of the vehicle, meets the requirement of a time-varying damping device engineering design mechanical property screening test in a domestic vehicle suspension system, simultaneously, the application of the equipment not only breaks through foreign technical blockade and fills the domestic blank, but also can greatly reduce the development cost of the vehicle and improve the stability and reliability of the vehicle.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention.
FIG. 3 is a schematic diagram of a control system of the damping test apparatus of the present invention.
The reference numbers in the figures illustrate: 10. a base; 11. a vibration isolation device; 20. a hydraulic actuator; 21. a first displacement sensor; 22. an adapter; 23. a force sensor; 30. a lower plate; 31. an elastic component; 311. a spring; 32. a time-varying damping device; 33. a second displacement sensor; 40. an upper plate; 41. balancing weight; 42. a third displacement sensor; 50. a top plate; 60. a support pillar; 61. a guide rod.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1-2, the invention discloses a damping test device, which comprises a base 10, a hydraulic actuator 20, an adapter 22, a lower plate 30, an elastic component 31, an upper plate 40 and a top plate 50, which are arranged in sequence from bottom to top, wherein a support column 60 and a guide rod 61 are vertically and fixedly arranged between the base 10 and the top plate 50, and the lower plate 30 and the upper plate 40 are both sleeved on the guide rod 61.
A first displacement sensor 21 is provided on the piston rod of the hydraulic actuator 20, an adapter 22 is provided on the upper side of the piston rod of the hydraulic actuator 20, and a load cell 23 is provided between the adapter 22 and the lower plate 30. The load cell 23 may be a torque sensor. The working principle of the invention is that the static load stress condition of the automobile under different road conditions can be simulated by changing the power output of the hydraulic actuator 20 and the material of the non-metallic material of the adapter 22. And load cell 23 may detect the load applied by hydraulic actuator 20. The first displacement sensor 21 can detect the amount of displacement of the lower plate 30.
The guide rods 61 are provided in plural, and the plural guide rods 61 are arranged symmetrically with respect to the hydraulic actuator 20. Thus, the stability is better. In the present embodiment, the guide rods 61 have four.
The elastic component 31 includes an upper spring 311 seat, a spring 311 and a lower spring 311 seat, the spring 311 is located between the upper spring 311 seat and the lower spring 311 seat, the spring 311 is sleeved on the guide rod 61, and the elastic component 31 has two sets. By replacing the springs 311 with different stiffness values, the stiffness of different types of suspension systems of the automobile can be simulated.
A time varying damping device 32 is also provided between the upper plate 40 and the lower plate 30. A time varying damping device 32 is located between the two elastic assemblies 31. The time-varying damping device 32 has a characteristic of time-varying damping coefficient, and the time-varying damping device 32 is coupled to the upper plate 40 and the lower plate 30 by screws, respectively. The damping coefficient of the time-varying damping device 32 can be changed in real time according to design requirements by closed-loop control of the time-varying damping device 32 itself. A second displacement sensor 33 is provided between the upper plate 40 and the lower plate 30. The second displacement sensor 33 may detect a change in the distance between the upper plate 40 and the lower plate 30.
The upper plate 40 is provided with a counterweight 41. By adjusting the shape and material of the counterweight 41, it can be used to simulate the mass of the automobile body and its natural frequency. A third displacement sensor 42 is provided between the upper plate 40 and the top plate 50. The third displacement sensor 42 may detect a change in the distance between the upper plate 40 and the top plate 50.
The base 10 is provided with a vibration damping device 11. The vibration isolation system can reduce the influence of the equipment on the surrounding environment. The vibration isolation device 11 is a conventional device, and may include an air floating device, a damper, a pressure regulating valve, and an inflation valve.
According to the invention, the time-varying vibration characteristics of the vehicle can be more truly simulated through the test equipment, and the urgent requirements of the engineering design mechanical property screening test of the time-varying damping device 32 in the domestic vehicle suspension system are met; meanwhile, an important technical guarantee is provided for improving the time-varying vibration control performance of the vehicle and the performance test of the vibration damping system.
Referring to fig. 3, the invention discloses a control system of a damping test device, comprising:
a first control unit connected with a hydraulic actuator 20 to control the operation of the hydraulic actuator 20, the first control unit being connected with the load cell 23 to acquire a measurement signal of the load cell 23;
A second control unit connected with a time-varying damping device to control the operation of the time-varying damping device 32;
a data acquisition and analysis module connected with the first displacement sensor 21, the second displacement sensor 33 and the third displacement sensor 42 to acquire measurement data of the sensors, the data acquisition and analysis module is respectively connected with the first control unit and the second control unit, and the data acquisition and analysis module is further connected with the time-varying damping device 32 to acquire a damping output signal of the time-varying damping device 32;
wherein, a signal modulation module and a safety protection module are arranged between the first control unit and the hydraulic actuator 20.
The control system of the damping test equipment jointly forms a multi-path closed-loop feedback working system for simulating road condition requirements and stress requirements required by the test.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A damping test device is characterized by comprising a base, a hydraulic actuator, an adapter, a lower plate, an elastic assembly, an upper plate and a top plate which are sequentially arranged from bottom to top, wherein a support column and a guide rod are vertically and fixedly arranged between the base and the top plate, and the lower plate and the upper plate are sleeved on the guide rod;
the hydraulic actuator is characterized in that a first displacement sensor is arranged on a piston rod of the hydraulic actuator, the adapter is arranged on the upper side of the piston rod of the hydraulic actuator, and a force measuring sensor is arranged between the adapter and the lower plate.
2. The damping test apparatus of claim 1, wherein said guide rods are provided in plurality, and a plurality of said guide rods are symmetrically disposed with respect to said hydraulic actuator.
3. The damping test apparatus of claim 2, wherein the resilient assembly comprises an upper spring seat, a spring and a lower spring seat, the spring is located between the upper spring seat and the lower spring seat, the spring is sleeved on the guide rod, and the resilient assembly has two sets.
4. The damping test apparatus of claim 3, wherein a time-varying damping device is further disposed between the upper plate and the lower plate.
5. The damping test apparatus of claim 4, wherein the time varying damping device is located between two of the elastomeric assemblies.
6. The damping test apparatus of claim 5, wherein a second displacement sensor is disposed between the upper plate and the lower plate.
7. The damping test apparatus of claim 1, wherein a weight is disposed on the upper plate.
8. The damping test apparatus of claim 7, wherein a third displacement sensor is disposed between the upper plate and the top plate.
9. The damping test apparatus of claim 1, wherein a vibration isolation device is provided on the base.
10. A control system of a damping test device, based on the damping test device of claim 6, characterized by comprising:
the first control unit is connected with the hydraulic actuator to control the work of the hydraulic actuator, and the first control unit is connected with the load cell to acquire a measurement signal of the load cell;
a second control unit connected with a time-varying damping device to control the operation of the time-varying damping device;
and the data acquisition and analysis module is connected with the first displacement sensor and the second displacement sensor to acquire the measurement data of the sensors, and is respectively connected with the first control unit and the second control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682268.3A CN111855175A (en) | 2020-07-15 | 2020-07-15 | Damping test equipment and control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682268.3A CN111855175A (en) | 2020-07-15 | 2020-07-15 | Damping test equipment and control system thereof |
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| CN111855175A true CN111855175A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010682268.3A Pending CN111855175A (en) | 2020-07-15 | 2020-07-15 | Damping test equipment and control system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737633A (en) * | 2021-09-15 | 2021-12-03 | 湖南大学 | Low-frequency tuned mass damper |
| CN117330271A (en) * | 2023-10-30 | 2024-01-02 | 中铁建电气化局集团轨道交通器材有限公司 | Device and method for testing vibration performance of elastic damping positioning wire clamp configuration |
-
2020
- 2020-07-15 CN CN202010682268.3A patent/CN111855175A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737633A (en) * | 2021-09-15 | 2021-12-03 | 湖南大学 | Low-frequency tuned mass damper |
| CN113737633B (en) * | 2021-09-15 | 2022-10-28 | 湖南大学 | Low-frequency tuned mass damper |
| CN117330271A (en) * | 2023-10-30 | 2024-01-02 | 中铁建电气化局集团轨道交通器材有限公司 | Device and method for testing vibration performance of elastic damping positioning wire clamp configuration |
| CN117330271B (en) * | 2023-10-30 | 2024-03-05 | 中铁建电气化局集团轨道交通器材有限公司 | Device and method for testing vibration performance of elastic damping positioning wire clamp configuration |
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