Jiao Li

Interface generation technology based on Concur Task Tree

Under the modern information-based operational environment, display/control system interface is a bridge between operator and weapon, and almost half of the code of interactive system is related with the graphical user interface, so a successful interface design is critical to interactive system. Based on this background conditions, this paper presents an approach to extract the dialog model from the task model for creating interfaces of the display/control system. Specific processes are as followed: establishing the Concur Task Tree (CTT) task model according to the specific tasks; transforming the task model into the priority model, and then converting it to the tree of temporal relation expression; extracting the dialog model (partially) in the form of state transition net (STN); finally, obtaining the interface model of display/control system.

Information selection based on fuzzy comprehensive evaluation

Under the modern information-based operational environment, the interface receives and processes more and more information, so organizing and selecting operational information in different combat missions are becoming more significant. Based on this background conditions, this paper sets up information selection evaluation index system, confirms the evaluation index weight by using analytic hierarchy process (AHP), and applies fuzzy comprehensive evaluation method to evaluate the importance degree of all operational information in various operational tasks. Finally, according to the importance degree of information in different operational missions, operational information is displayed on interface in reasonable way.

Study on prediction the cutting force of the face milling

Face milling is a typical intermittent cutting process. With the tools rotation, as well as the cutter tooth cutting in and out of the workpiece, the magnitude of the cutting force also changes periodically; furthermore, it would influence the cutting heat, tool wear, chip shape and the integrity of machining surface directly. Therefore, making the exact prediction of the cutting force in face milling, is not only the premise of researching the cutting mechanism, but also the foundation to launch the study of the simulation and deformation in process of face milling. Therefore, this paper will first establish the milling force prediction model based on the average cutting force. Consider the cut-in and cut-out angles influence when solving the milling force coefficient. Then the models parameters can be calculated through experimental test; thereby predict the instantaneous milling force. Finally comparing with the experimental data to verify the model has been established. And results state clearly that this model is well in predicting the cutting force both in trends and precision.