Learn More
This paper presents a comprehensive approach to effectively and accurately extract coastlines from satellite imagery. It consists of a sequence of image processing algorithms, in which the key component is image segmentation based on a locally adaptive thresholding technique. Several technical innovations have been made to improve the accuracy and(More)
The advantage of linear PID control is easy tuning, but its obvious  disadvantage is the conflict between the stiffness and the performance when this approach is applied to  magnetic  suspension  system. In order  to enhance the stiffness of the system, the usual way of linear PID control is(More)
Vehicle-coupling-rail vibration is ubiquitous in maglev system. Taking the vehicle-rail system as the research object, the reason why the vehicle-coupling-rail vibration arises is analyzed when the classical feedback is utilized. A new method is presented to suppress the vehicle-coupling-rail vibration. This method is derived by utilizing the differential(More)
The LSM, or linear synchronous motor, with permanent magnet Halbach array and ironless coil possesses the dominant advantages of direct linear movement and being energy-saving. To analytically investigate the characteristics of this innovative LSM, its magnetic field and magnetic force are analyzed in this work. Based on the magnetic field of a single(More)
For the control of hybrid maglev systems with permanent magnets and electromagnets, differential geometry is introduced to linearize the suspension system by feedback linearization technique, which can guarantee global stability of the system. Considering that in physical systems the suspensions load can changes largely, an improved strategy is proposed(More)
In this paper, the performance of the traditional linear current-loop strategy of a single-point Electromagnetic suspension system is analyzed and its disadvantages in application is pointed out. It is concluded that the time constant of the resultant voltage-current subsystem varies as the changes of the suspension states, which will destroy the condition(More)
  • 1