Applied Mechanics and Materials Vols. 241-244

Abstract: Taken some fixed-wing UAV as the study object, the aircraft movement was broken down into the longitudinal movement and lateral movement according to the linearized small perturbation principle, the longitudinal control law design method was discussed using root locus which belonged to classical control theory. The six degrees of freedom nonlinear model simulation result shows that: the control parameters designed are reasonable, the simulation profile is fully consistent with the setting profile, the control effect of pitch angle loop and altitude loop meets with the indices requirements, the method is mature and reliable, easy to realize in engineering.

Abstract: Abstract. Taking the botnet incident response plan decision-making as an example, we construct a new model by using action decomposition. In this model we introduce action layer, relation between sub-actions and decompose the complex incident response plan into many layers. This model provides a graphic representation of the complex plan. By analyzing the decomposing method and the action node structure, we prove that the store space size of this graphic representation is not increased exponentially when the action node added.

Abstract: A new intelligent control system for a new type equipment of special-shaped stone machining is presented, it can reach high quality of intelligent machining for the special-shaped stone production. The hardware platform use universal IPC as kernel, which consists of IPC, embedded micro-computer system, SCM(Single Chip Micyoco). The CAD/CAM system consists of 3 sub-modules: graphic information processing module, 3-dimention dynamic modeling and simulating module and machining implementing module.

Abstract: The paper describes design technology of FPGA and design method of SOPC, and designs DC motor speed control system based on SOPC technology. To be more specific, it includes establishing a Nios II embedded system on FPGA for which PWM, tachometer module and relative driver are customized. It also applies C language programming to actualize PID control algorithm, and conducts simulation on main system module functions.

Abstract: A new guaranteed cost controller design approach for a class of Takagi-Sugeno (T-S) fuzzy descriptor systems with time-varying delay is presented. Based on the fuzzy rules and weights, the less conservative sufficient conditions for the existence of guaranteed cost controllers via state feedback are given in terms of linear matrix inequalities (LMIs). This method includes the interactions of the different subsystems into one matrix. And the design of optimal guaranteed cost controller can be formulated to a convex optimization problem. At last, a numerical example is given to illustrate the effectiveness of the proposed method and the perfect performance of the optimal guaranteed cost controller.

Abstract: In this paper, we focus on the problem of guaranteed cost control for a class of nonlinear systems described by the Takagi-Sugeno (T-S ) fuzzy descriptor model with multiple time delays. A quadratic cost function is used as a guaranteed performance index. The descriptor type of Lyapunov-Krasovskii functional is employed to analyze the asymptotic stability and design the guaranteed cost controller. The sufficient conditions for the existence of the guaranteed cost controller are given in terms of LMIs. At last, an illustrative example is provided to show the effectiveness of the proposed method.

Abstract: Using model based design(MBD) method, deadbeat control algorithm for three-phase grid-connected inverter was designed in optimization and realized in hardware. According to the advanced idea of MBD and its basic procedure, the software-in-loop(SIL) test, processor-in-loop(PIL) test and hardware-in-loop(HIL) test for deadbeat control algorithm were mainly researched under MATLAB/Simulink environment choosing TMS320F2812 as object hardware board. In such method, embedded codes could be produced automatically and the errors brought in through algorithm model could be tested and corrected earlier. Meanwhile, simply changing the PIL related modules, the self-defined deadbeat algorithm module could be flexibly applied in other hardware platforms. At last, the correctness and efficiency of deadbeat control algorithm were verified in three-phase grid-connected inverter experiment platform.

Abstract: Considering that the threshing cylinder palstance system has characteristics of nonlinear, time-delay, what’s more the control environment is very complex and multi-disturbance; this paper presented the method of nonlinear PID to control the cylinder palstance. Firstly, The paper analyzes characteristics of the model of the threshing cylinder palstance system .Then the nonlinear PID controller is designed, and with the threshing cylinder palstance system constitute a closed-loop control system. Finally, simulation results show the effectiveness and feasibility of the proposed method.

Abstract: In order to solve the time delay problem between the process parameters and the quality indicators in the modeling processes, a method of time delay estimation on COREX parameters is proposed based on Dynamic Time Warping (DTW) algorithm. The method solves the problem existing in the conventional methods which demand the number of calculating sample to be same. Taking the real field data from Baosteel COREX-3000 as the research object, the DTW distances between the process parameters and the quality indicators are calculated, and then the delay time is estimated. The real field data are used for verification, the results show that the proposed method can estimate the time daley effectively, and the prediction accuracy of model which used time delay estimation becomes higher. It provides an effective measure for model preprocessing.

Abstract: Robot soccer is a new research topic of artificial intelligence. The robot soccer game can be simply simulated by software. As the core part of defensive strategy, the goalkeeper's defensive is also a difficult subject in the soccer robot game. The site is devised by the rules, and the area of ball is as the center. This strategy does not consider the other player's position as well as their overall offensive state. It is not adopt to determine some special cases. A novel defensive strategy of goalkeeper is designed, and the experiments in different arithmetic are done and the results are noted. It needs to be further improved in guarantee real-time performance