汽車制動防抱死系統(tǒng)外文翻譯-汽車設(shè)計(jì)-在線瀏覽
2025-03-24 04:01本頁面
【正文】 raking stability by ABS. This paper will study the fault diagnosis technology of ABS to provide a kind of technical and method for fault study is divided into two aspects. First, bination of hardware in the loop test technology, a fault simulation system of ABS has been established through simulating the sensor failures and actuator failures to provide evaluation environment for evaluating the capability of fault diagnosis and fault handling. Second, a new diagnostic method through the fault reconstruction has been provided for the sensor of functional requirements of the system has been provided based on the analysis on the structure and working principle of ABS, and then the structure of the fault simulation system. In order to evaluate the realtime of fault diagnosis and the correctness of fault handling in different states, a fault event control module and fault generation module methods has been provided to set fault in different controlling. This paper presents a fault simulation system which can meet the the test requirements of fault diagnosis performance of ABS, but also provides a reliable test environment for the study of subsequent fault diagnosis on the principle of both the electromagic and Halltype wheel speed sensors, signal characteristics are extracted for teethmissing fault of wheel speed sensor as well as a big gap between the sensor and the gear ring, so that various faults of ABS system can be simulated accurately. Accordingly, a hardware and software design is proposed to simulate the faults of wheel speed sensor, namely, teethmissing, big gap, open circuit, short circuit. Additionally, fault simulation for the wheel cylinder pressure sensor, pumps, and also solenoid valve circuit can also be disposed. The influence on the fault simulation signal is analyzed, which is made by the phase difference signal in output sinusoidal signal. And then the circuit simulation and experimental results are given. There are there control modes in ABS, namely, Increase, Decrease, and Hold modes, and it may result in different affects on the braking performance when fault occurs in various modes. Consequently, a modelbased control mode predictive approach is presented to produce given fault in arbitrary mode, and it provides an effective test environment for the evaluation of failure a certain class of fault in ABS sensors which can be described as a kind of additive one, a sliding modebased reconstruct method is investigated. Then, it is applied to the open circuit fault of the wheel cylinder pressure sensor, by establishing a nonlinear math model of the wheel cylinder. The simulation results show that the fault can be reconstructed. The testing of the performance of automobile braking, one of the most important items of safety testing of motor vehicles, is always our attention focus. How to test the performance of braking objectively and accurately and how to make it serve the society and benefit the people can’t be seperated from the present situation of motor vehivles which need testing.. In recent years, the number of motor vehicles in our country is increasing rapidly, and at the same time, the problem of safe driving is more and more striking. Therefore, it is an important task to be studied and solved for the whole society, especially for the department of the public security and the department of transportation to strengthen the amnagement of motor vehicles and attach importance to the safety testing of our country, the testing epuipment of the performance of automobile braking is developed on the base of importing various kinds of foreign testing equipment. The equipment being used at present include all types of that imported from Japan and West
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