A vehicle-mounted fuel cell vibration test system simulating actual driving conditions

Abstract

The invention relates to a vibration test system for simulating vehicle-mounted fuel cell vibration under actual driving conditions. The system is used for simulating vehicle-mounted fuel cell vibration state reproduction under the actual driving conditions. The system comprises a vertical vibration signal real-time generation unit, a vibration execution unit, a data acquisition unit and a control unit. The vertical vibration signal real-time generation unit is used for simulating a vertical vibration target signal of a vehicle-mounted fuel cell under different speeds and road surface roughness; the vibration execution unit is used for generating vertical vibration; the data acquisition unit is used for collecting a vertical vibration actual signal of the vibration execution unit; and the control unit is used for carrying out tracking control on the vibration execution unit according to the vertical vibration target signal and the vertical vibration actual signal to enable the vibration execution unit to carry out vibration reproduction on the vertical vibration target signal. Compared with the prior art, the system is high in practicality and simple to operate, is free from the influence of climate environment restrictions, and can realize reproduction of the real driving conditions.

Description

technical field [0001] The invention relates to a vehicle-mounted fuel cell vibration test system, in particular to a vehicle-mounted fuel cell vibration test system for simulating actual driving conditions. Background technique [0002] Due to its advantages of high efficiency and zero emission, fuel cell vehicles have become an important direction for the future development of the automobile industry. Scholars at home and abroad have found in their research the adaptability of fuel cell vehicles to the road driving environment, that is, under actual road driving conditions, due to factors such as road unevenness incentives and changes in driving speed, the impact on the overall fuel cell system and its components will be affected. Compared with the static test results in the laboratory, the vehicle economy and power have obviously declined. In view of the current situation that the actual vehicle test is susceptible to external interference, poor test repeatability, and h...

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have found in their research the adaptability of fuel cell vehicles to the road driving environment, that is, under actual road driving conditions, due to factors such as road unevenness incentives and changes in driving speed, the impact on the overall fuel cell system and its components will be affected. Compared with the static test results in the laboratory, the vehicle economy and power have significantly declined

In view of the current situation that the actual vehicle test is susceptible to external interference, poor test repeatability, and high cost, it is necessary to design a vibration test system for the fuel cell system to simulate its vibration in various driving conditions under road excitation, so that It is convenient to study the performance change of vehicle-mounted fuel cells under road vibration environment

[0003] The current traditional road simulation control method belongs to random vibration control. RPC (Remote Parameter Control) technology as a representative adopts the off-line iteration method, which needs to spend a long time to iteratively calculate the driving signal corresponding to the target vibration signal before the formal test. This kind of control strategy is not real-time, and it is poorly adapted to the possible time-varying and nonlinear effects of the system; secondly, the traditional random vibration control strategy adopts the idea of ​​spectrum equalization, which cannot realize online analysis and real-time reproduction of non-stationary signals

Furthermore, this vibration reproduction method does not consider the vehicle and road surface models, and often needs to collect vibration signals in advance and analyze and process them. It is impossible to change the speed of the vehicle arbitrarily in the test room, which is quite different from the actual driving situation.

[0004] Patent CN101498615A shows an electric road simulation test bench, which uses the rotary motion of the servo motor as the driving source, and converts the screw into linear motion to simulate vertical vibration. The structure is relatively complicated, and it is impossible to realize the real-time vibration environment at any speed simulation

[0005] Patent CN102788702A shows a road simulation test bench for vehicle testing. Its research goal is the reliability test of the whole vehicle under the environment of temperature, humidity, air pressure and road surface vibration, and the vibration of the vehicle fuel cell system cannot be carried out. reproducible test

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