Applied Mechanics and Materials Vols. 716-717

Abstract: The optimal design for computer control software is studied. Since computer control software is susceptible to interference during the control process, a computer control software design model based on improved PID algorithm is proposed. The PID algorithm is combined with particle swarm algorithm to calculate PID control parameters, which is viewed as evolutionary particles of the particle population, and given a certain flight speed in the search space, the speed of the particles will be adjusted iteratively and dynamically in accordance with the experience of population’s evolution calculation, in order to achieve computer control software design. The simulation results show that the proposed algorithm applied for computer control software design, can improve the control precision and meet the actual needs of computer control.

Abstract: For the UAV’s characteristics that is the date of camera shooting and photographing and digital map contain information, a UAV target location method is presented based on image matching. Firstly, using the artificial reconnaissance registration method that has improved, the UAV aerial images that consider digital map coordinates as the target are registered to obtain registration information. Then, the UAV video frame resolution containing the target is improved by improving the method of super-resolution reconstruction. Finally, making use of the Gaussian pyramid matching algorithm based on optical flow, the video frames are registered with the aerial to complete the target. By MATLAB and C++ simulation, achieving the above algorithm. The results proved that this method achieve the target location without the UAV position and attitude information, while improving the precision and speed of target location, that is an effective method for target location in the battlefield.

Abstract: Time-delay is very often encountered in various technical systems, such as chemical processes, robotics, etc. The existence of pure time lag, regardless if it is present in the control or/and the state, may cause undesirable system transient response, or even instability. This paper discusses design of the time-delay system with integral-type. With the model following control system method, we obtain a simple input control law. The proposed methodologies are illustrated herein using example of the time-delay system. In this case, new criterion is proposed to ensure that internal states are stable.

Abstract: According to the number of constraints of the reactive power control equipment, this paper considers the constraints of the voltage in the load of extreme points of the segmentation program period, and uses dynamic optimization of sub-segmentation in the load curve. It solves the optimization based on applying improved particle swarm optimization into load curve segments, and uses particle swarm optimization through adaptive inertia weight and acceleration factor, phase initialization and mutation operations in order to improve the ability of global optimization.

Abstract: This paper proposes the sliding mode control design based on extended state observer control approch for the flight attitude system.The extended state observer (ESO) with new structure is used to estimate the total disturbance and to compensate the control object so that the flight attitude system can be simplified. Then a sliding mode controller is used to stabilize this simplified system. Finally, a numerical simulation shows the effectiveness of the proposed control design method.

Abstract: A fuzzy nonsingular terminal sliding mode control scheme for the attitude of flapping wing micro aerial vehicle is proposed in this paper. Based on the feedback linearization technique, a nonsingular terminal sliding mode controller is designed. To reduce the chattering in the control input, a fuzzy controller is designed to adaptively tune the switch part gain of nonsingular terminal sliding mode controller according to the nonsingular terminal sliding mode surface. The stability of the control scheme is verified by using Lyapunov principle. Simulation results show that the proposed control scheme is effective.

Abstract: The accurate control methods for temperature of metallic materials smelting is studied. For the defect of temperature changes with quite high frequency caused by complicated process during metallic materials smelting process, a temperature optimal control method of the metallic material smelting based on 2T-S fuzzy model is proposed. Temperature state signal is collected by the sensor during the smelting of metallic materials, then filtered and regarded as input data for a 2T-S fuzzy model. 2T-S fuzzy model is established to achieve temperature optimal control during metallic material smelting. The experimental results show that the proposed algorithm can effectively improve the accuracy of the temperature control of metallic materials smelting process, and achieved satisfactory results.

Abstract: Environmental parameter control is a common case in the technique of computer measurement and control, which has been widely applied to the practice of industrial and agricultural production. PID refers to one of the algorithms commonly used in temperature control, while the setting of PID parameters is the key to the algorithm. As one of the most successful branches in artificial intelligence technology application, expert system can simulate the thinking process of human experts by making use of the experience and expertise accumulated by experts for years, so as to resolve difficult problems that can only be settled by experts. An application scheme of expert system to PID thermostatic control is proposed by this paper for the purpose of making thermostatic control more convenient and intelligent.

Abstract: In order to control effectively the temperature of the motorized spindle, based on thermodynamics, heat transfer theory and fluid dynamics control theory, the model of motorized spindle with cooling system is established and simulated. Based on the idea of orthogonal experiment and simulation experiment, the comprehensive tests are built, and the optimum matching relation between the heat flux of motor and the flow velocity of cooling liquid is determined in this article. The results show that the flow velocity of coolant can be adjusted according to the heat flux of motor which can control the temperature in the steady range and improves the cooling effect.