Advanced Materials Research Vols. 383-390

Abstract: For the non-linear phenomena of the switching power supply, the discrete mathematical model of current-controlled Boost DC/DC converter has been presented in this paper, according to the switch maps. The results of simulation and experiment are derived, and the variable is the current of inductor. The accuracy of the model has been verified by the results of simulation and experiment which reveales the DC / DC converters from the bifurcation and eventually to the phenomenon of chaos. The theoretical basis using or avoiding chaos is provided for the power supply design.

Abstract: To accommodate deep sea walking wheel the complex characteristics of deep sea environment such as randomness, non-linear and variability, the algorithm of Multi-Model-Reference Adaptation Fuzzy Control is presented to run the walking wheel system steadily. This control method incorporates the multiple reference models, fuzzy control and the conventional PID control; it runs efficiently by the control compensation deduced by the error of different phase-plane zones with the guidance of reference models.

Abstract: A reliability mathematical model of the hoist control system based on Markov process was developed and a formula of availability and reliability of the system was derived. At the same time a redundancy-based technology was introduced to improve the reliability of mine hoist control system according to the special requirements of safety and reliability. A new way of thinking is provided to further study the reliability of similar control system through the reliability study of hoist control system.

Abstract: In this paper we describe a small four-rotor UAV's autonomous flight control system. A comprehensive plan of flight control system was designed base on the remote control model aircraft for flight platform, and Completed with AVR microcontroller core flight control system software and hardware design. It including device type, hardware circuit design and software design. Preliminary study of the four rotor while the helicopter flight control program design, For the future to perform more complex tasks such as fixed-point flight, obstacle avoidance and coordination of multiple aircraft flying and so lay a foundation.

Abstract: This paper simulated the virtual master shaft based on the analysis of the working principle and the existing problems of the hydraulic press brake as well as based on the application of the virtual shaft algorithm in motion control, which directly drive the synchronous system of the hydraulic press brake. We established the model of the virtual master axis and the model of the hydraulic press brake which based on the virtual shaft algorithm, and simulated the models in Mat lab. We obtain the better effect in the accuracy and combination property.

Abstract: This paper presents a novel control system for underwater vehicle. The underwater vehicle is affected by the inevitable surge and measurement error when working. In order to achieve reliable and quick control characteristic, this paper realize the control system by fuzzy compensation based on Kalman predictor with iterative control response. With this predictor and the control error, the fuzzy controller calculates the control compensation, and then the underwater vehicle completes a fast response control. By the control simulation, the results show that the method is effective and feasible.

Abstract: A new method of teaching method has been proposed for the palletizing robot. The principle of the method has been elaborated and a new algorithm about this method has been proposed. The servo control system is used to carry out this method. The practicability and conciseness of this method has also been analyzed through the simulation with soft Admas and real experiments. The results of simulation and real experiments prove that this novel method is feasible and can meet the practically industrial demands.

Abstract: An engineering model of solar array can reflect the real-time output voltage and current, the maximum power point voltage, the maximum power point current and the maximum power point in any light intensity and any temperature of solar arrary. A simulation model is established in Matlab/Simulink and proved the engineering model correctly and reliability. Using the method of Perturbation and Observation (P&O) and Incremental Conductance (INC) track the maximum power point of a solar array under the reference standard of these output elements, and found out the pursuit gain around the reference standard oscillation and further to validate the model's reliability.

Abstract: An optical flow sensor is fabricated by using an optical navigation sensor as its core chip. The design process is detailed and an optical flow testing platform is designed to test its performance and calibrate its basic parameters. Then the optical flow sensor is introduced to the altitude-holding control loop of a cruise missile and a hardware-in-loop simulation is demonstrated. The simulation result verifies the sensor’s effectiveness in the low-altitude penetration.

Abstract: We put forward the concept that introducing the methods of region partition and node optimization into original optimization of AOC, in order to solve the problems that ACO’S low efficiency in original execution, huge computational complexity in the process of conclusion, mess route and easily trap into the local optimal solution. The number and location of urban node after dynamic optimization reduce the ant colony quantity and iterative time arithmetic. The optimization improves the execution efficiency of arithmetic, and at the same time the analog simulation successfully applies to the robot path planning design, which show that the method is efficient and applicable so as to create a new approach of improve ACO.