The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The phenomenon occasionally occurs during the running of the high-speed maglev train that the suspension control system fail to get the gap signal. That's because one of the two suspension sensors mounted on the side of the lap structure becomes invalid and the other is just over the joint. The high-speed maglev train will not be able to track desired trajectory consequently. This study is conducted...
For suspension control of low-speed PEMS train, the usual strategy is to separate the maglev module into two individual single points, which neglects the coupling effect of adjacent single point. To suppress the coupling effect, this paper suggests the method of designing control law considering the whole module. The simulation result verifies the validity of the new control law, which can suppress...
A new style tracking-differentiator based on border characteristics is applied in the Fault Diagnosis and Active Fault Tolerance problem for accelerator in maglev system. The integral of accelerator signal is compared with the differential of gap signal, and the difference is used to obtain the decision variable and threshold according to Bayes's decision theory. When fault occurs, integral of accelerator...
There exist corresponding relationships of state information between the suspension points of the maglev train. This essay carries on the statistics of monitoring data of all the suspension points, describes the distributed situation of the suspension points data frequently spotted in engineering practices, detects suspect values and abnormal values in the suspension system based on the steady estimator...
Currently, computer is widely used in a ground vehicle or at the aircraft. However, the vibration maybe impact on the computer, especially the HD array. Therefore, this paper presents a new mechanical and electromagnetic composite vibration isolation system, adding active electromagnetic vibration isolation devices on the foundation of passive mechanical vibration isolation system. Symmetric electromagnets...
The suspension characteristics of maglev train are studied in this paper when it is running on different curves. The suspension gap variation when maglev train is running on three different curves are presented. And the limitation to the vertical semi-diameter of the curve at the point where the grade of the longitudinal section of the track changes is also calculated. In addition, simulation is carried...
Time delay is a kind of common nonlinearity, which is consisted in many parts of suspension system of high speed maglev train.In this paper, the dynamic behavior of suspension system of maglev train with time-delayed velocity and acceleration feedback signal is considered with rigid guideway. Taking time delay as its bifurcation parameter, the condition with which the Hopf bifurcation may occur is...
The problem of sensor-fault detection and diagnosis (FDD) of maglev system was studied based on principal component analysis (PCA). First, the mathematic model of single electromagnet suspension system was constructed, and then a sensor-FDD strategy was designed for it based on PCA. The performance of the FDD strategy was simulated. At last, tracking-differentiator (TD) was introduced into the sensor-FDD...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.