1、 Product Introduction:

The four column vehicle vibration test bench is equipped with four actuating cylinders in the vertical direction, mainly used for full road vehicle spectrum simulation tests. The system has High thrust and can accurately simulate and reproduce the vibration environment of the car during actual road operation, thus evaluating the safety and driving comfort of the car suspension system. The system has a compact structure that meets the performance indicators required by users. It can be installed on foundations or movable mass blocks according to customer needs.

The four column test system is used to fully or partially simulate the vibration environment of the entire vehicle during road driving, as well as the driving conditions of the vehicle under different road conditions. Capable of conducting durability tests on the entire vehicle, carriage, frame, and onboard equipment; Capable of conducting dynamic response testing on carriages, racks, and onboard equipment.

The four column vehicle vibration test bench is based on certain theoretical testing and measurement methods to test and determine the load applied to the vehicle under real and effective working conditions, and to collect and analyze data to obtain the corresponding load spectrum; When conducting effective experiments, the load spectrum is tested normally using the equipment, and the test results are consistent with the actual effective load results under actual operating conditions.

This test device belongs to the rapid simulation test equipment for the whole vehicle interior, with the aim of quickly and effectively detecting the relevant technical parameters and data exhibited by the whole vehicle in a vibration environment.

This experimental equipment can provide a loading force of 0-50KN and can achieve PID closed-loop control of the loading force;

The adjustable range of single axis vibration frequency is 0.01~50Hz, which can be set on the computer by oneself;

It can perform four axis linkage control or independent control, including target zero point control and positioning;

The maximum displacement of a single action is 100mm, with a control accuracy of 0.001mm;

The effective controllable acceleration range of a single actuator is 0-20g, and it can be used for spectrum and acceleration setting and control;

The maximum load capacity is 3.5T;

The adjustable range of the front wheelbase is 1100~1800mm (manually adjusted);

The adjustable range of rear wheelbase is 1100~1800mm (manually adjustable);

Adjustable wheelbase range of 1500~3600mm (manually adjustable);

The installation method is platform base installation (fixed type);

This test bench belongs to non-standard specialized equipment. The technical solution provides a detailed introduction to the process design reference standards, main performance parameter indicators, control principles, and component composition of the equipment, which can help customers better understand this equipment and compare it with other products to better select equipment that meets technical requirements and testing standards.

2、 Product specifications and models:

Equipment model: GC-ZD-FB50VT01

3、 Reference standards:

Generally, it meets the customized standards of customers, and the supply and service of experimental equipment comply with the relevant industry regulations or safety requirements.

ISO (International Organization for Standardization)

IEC (International Electrotechnical Commission)

GB (National Standard of the People's Republic of China)

Customer standard: customized for customers (electro-hydraulic servo vibration test);

Scope of application: Non standard customization;

3、 Test scope:

1. Design, manufacture, supply, and commissioning of a four column vehicle vibration test bench.

2. Electrical control wiring between the test bench and the electrical control cabinet

3. Design and reserve pipeline interfaces and power line interfaces for the required media on the test bench

4. The test bench is capable of achieving the above technical parameters and indicators.

5. Equipped with a four column positioning device, hydraulic alarm device, system overload alarm, overtemperature alarm, oil level high and low alarm, and power-off protection device.

The purchaser includes the following contents:

1. Provide a stable three-phase five wire power supply with 1 circuit, voltage range: AC three-phase 380V/220V

2. A good grounding system requires a grounding resistance of<1?

3. Medium required for the experiment

4、 Overview of device functions:

Types of experiments that can be conducted by the road simulation test system

Vehicle road simulation test;

Reproduce the load spectrum on the road simulation system based on the displacement, acceleration, and strain data of the vehicle obtained from road testing;

Vehicle durability test;

Component vibration testing conducted on actual vehicles;

Experimental waveforms that can be conducted by the road simulation test system

The time history curve and compressed and strengthened road spectrum generated from actual road test data;

Spectrum reproduction;

Periodic sine, random waveform, and sine sweep waveform;

Types of roads that can be simulated by the road simulation test system

General and smooth road surfaces, mountainous road surfaces;

Uneven road surface, Belgian road surface, washboard road surface, fish scale pit road surface, pebble road surface;

Twisted road surface, washboard road surface, ditch road surface, off-road road surface, etc;

Noise occurs on road surfaces, resonance occurs on road surfaces;

5、 System composition:

1. Power section - hydraulic station

The equipment generates a pressure source through a hydraulic power station, and then transmits the rated pressure to the actuator to drive the vibrating cylinder through a servo valve.

The hydraulic main motor adopts Siemens variable frequency motor, with a constant and stable output motor speed, efficient overload capacity, and maximum response to servo system actions; The main pump adopts a high flow blade pump to minimize the noise of the oil pump and provide customers with a good working environment. The ambient noise decibel value during normal use is between 70-90, which is more than 40% lower than other hydraulic pumps. It is particularly suitable for long-term fatigue testing requirements; This system can also operate for a long time in dusty and humid environments.

The system has the advantages of fast response speed, high control accuracy, and good stability, and is widely used in fields that require high-precision control. The control principle is to use deviation signals to control the energy input of hydraulic energy into the system, so that the system changes in the direction of reducing deviation, thereby making the actual output of the system match the desired value, forming a closed-loop control system.

2. Static pressure support servo actuator

Adopting a long-life, high-frequency static pressure support servo cylinder imported from Germany, it is a bidirectional dual rod dynamic servo cylinder with high response and low friction characteristics.

The static pressure support servo actuator does not use any sealing rings, and uses static pressure support bearings to achieve sealing and guidance between the piston rod and the cylinder body. During operation, regardless of whether the supported components are in a stationary or moving state, there is a layer of lubricating oil film that separates the working surface of the friction pair, which is more suitable for testing with higher precision requirements.

No mechanical sealing ring, no friction, no adhesion, no wear

Has ultra-high control accuracy, good precision retention, and high motion accuracy

Liquid friction, long lifespan

High frequency response, high sensitivity, high motion speed

Excellent lateral resistance and automatic centering function

Special layer self-lubricating

Parameter indicators of static pressure support axial servo actuator

The actuator adopts a double blade bidirectional static pressure bearing structure (double outlet rod static pressure support structure)

Maximum dynamic test force: ± 50kN

Displacement stroke: ± 50mm

High frequency response: 0.01-400Hz

High speed: The standard model can reach up to 4m/s (the high-speed model can reach up to 20 m/s)

Working oil pressure: 21MPa

3. Fully digital servo controller

The fully digital controller adopts advanced digital signal processor (DSP) technology in the control field and high-speed real-time hardware interrupt technology under WINDOWS XP system. Command signals and control signals are all generated by digital operations, ensuring the reliability and repeatability of the control system. It can achieve complex servo loading functions and is widely used in the field of dynamic testing machines.

4. Main modules of the system

*The computer module adopts Advantech brand industrial control computer to ensure the reliability of long-term operation of the system.

*The DSP real-time signal processing module is the core of this system, which can generate various control waveforms, achieve high-precision control, and control compensation functions.

*Signal conditioning module:

Power signal conditioning unit

Displacement signal conditioning unit

Deformation signal conditioning unit

*All key components of each unit are designed using high-performance analog devices from AD Company in the United States, which have the advantages of low temperature drift, low noise, and good linearity, ensuring the measurement accuracy and stability of the system.

*Servo valve drive module, which can drive multiple servo valves

2. Controller parameter indicators

*Adopting a fully digital servo controller.

*The control processor adopts a 32-bit DSP chip, and the software operating system runs on the WINDOWS XP platform.

*Function generator frequency: 0.01-100Hz.

*Test frequency: 0.01-50Hz.

*Control modes: displacement, load, and deformation, and can be smoothly switched.

*Function generator waveforms: sine wave, triangular wave, square wave, sawtooth wave, random wave, etc.

*Power 220V 2kW

3. Computer operating system

The application software runs on the WINDOWS platform, and all operations are performed on the Chinese virtual panel, which allows for convenient static and dynamic loading, testing, and parameter setting functions; The experimental data can be imported into software such as Word and Excel,.

Real time collection and storage of experimental data. Real time drawing of multiple curves. Complete graphic processing functions, such as curve enlargement, curve center point movement, manual curve marking, and real-time drawing of various curves such as load time and displacement time.

4. Intelligent cooling system (temperature intelligent control)

The equipment adopts a cooling tower water cooling method, with a cooling air volume of 80m&sup3/ min， Adopting two sets of cooling water supply systems, only one set of water pumps is turned on under low load conditions, and the other set of water pumps is automatically turned on under high load conditions to achieve optimal energy-saving control; The water tank has a capacity of 1.2~1.8m;, Equipped with an automatic water replenishment valve, low-temperature automatic control, and automatic drainage in case of icing; When the water level is too low, the water pump automatically stops working and an audible and visual alarm is triggered.

5. Safety devices

The equipment is equipped with an emergency button, which will automatically shut down in case of an emergency malfunction;