Research On State Supervision Technology Of Test-bed For Automobile Transmission

State Supervision Technology of Test-Bed for Automobile Transmission focus on analyzing current states, detecting and diagnosing process anomalies, based on the measurements of process data and characteristics. In this context, whenever an abnormality occurs in a process, the system should respond quickly in detecting and diagnosing malfunctions, and give a alarm signal. Nowadays, Although Transmission test has been widely used in our country, generally, The test-bed is lack of state monitoring system. The transmission is detected and monitored In the course of the experiment for the timely detection of early failure. An efficient state supervisory control system that takes advantages of providing safety and steady conditions is very important for the test.For Automobile Transmission test the specific needs of condition monitoring, analyzing the temperature, speed, torque and vibration signals of the transmission during the Automobile Transmission test, choosing the hardware needed to test systems, such as sensors, industrial computer, data acquisition cards, etc., The alarm system, including oil temperature,, speed, torque and vibration signal, has been designed. In which vibration signal alarm monitoring of transmission is the focus of the study subjects.Order analysis technology overcome the disadvantage of the tradition frequency analysis, completely solve the key technology of the feature signal acquired. In the preliminary study of the signal at the theory and order on the basis of the analysis method proposed in this paper to determine the absolute order times, the relative order and characteristics of sub-bands to determine the sum to determine the method, supplemented by the signal time-domain characteristics of the diagnosis, Based on the preliminary study of the signal at the theory and Order Analysis Method, order, relative order, sum of characteristic orders and trend curve Analysis Method is proposed and implemented in the paper. At the same time, the new type of diagnosis system use the feature signal of the time domain to analyze the condition of the Transmission case. Alarm monitoring system Based on the theory of Order Analysis is designed.The reference spectrum for criterion is acquired by learning through historical data. Comparing the reference spectrum and the Real-time spectrum can judge Whether the transmission is in health status, and the reliability of monitoring system can be improved.This topic's data acquisition and trial is relying on Qingshan Transmission Co., Ltd.'s Automobile Fatigue Life Test-bed which was developed by the Automobile Testing Institute of Technology of CQUT (Chongqing University of Technology), this is a more targeted way because in this subjects the test-bed monitoring object is also the test-bed developed by our research group. The ultimate success of this topic to develop automobile transmission test-bed condition monitoring systems---FDG. V1.0, and take advantage of on-site collection of transmission vibration signal samples are taken for a diagnostic test. Experiments show that the system is capable in early diagnosis according to vibration signals in the process of transmission running, it is proves the feasibility of theory and methods that we did in the topic.