Advanced Materials Research Vols. 926-930

Abstract: The fire control measuring equipment are the most important devices when the aircraft attacks, so its precision directly affects the final outcome. In this paper, the tracking and measuring errors of measuring equipment of fire control calculator of a certain type of aircraft are studied, the error sources in the process of aircraft tracking and attacking are analyzed and simulated, the influences of each errors sources on tracking and attacking error are discussed, and some advises for reducing errors are given

Abstract: the numerical control milling process design is on the basis of ordinary milling process design, combining with the characteristics of CNC milling machine, give full play to its advantages. CNC milling process design is the key to reasonable arrangement of process route, to coordinate the relationship between the CNC milling process and other process, determine the content and steps of NC milling process make the necessary preparations for programming. NC milling machining process analysis is related to the effectiveness and success or failure, is one of the important preparations before programming. This article will mainly for NC milling machining precision and machining error analysis and research.

Abstract: Parameter optimization of PID controller design, parameter optimization method is proposed based on quantum genetic algorithm for PID controller tuning problem. Quantum Genetic Algorithm (QGA) DC servo motor control system PID parameter optimization control, quantum genetic algorithm to optimize the results of the genetic algorithm, the simulation results show that the QGA to optimize control get PID controller comprehensive performance is better than general genetic algorithm optimization PID controller, and the realization of the algorithm does not depend on the controlled object, so that the control system has better robustness and stability, with a wide range of practical in engineering practice play a good role in the control.

Abstract: Poultry breeding environment factors such as temperature and air humidity directly affect poultry production performance for large-scale poultry farms in the demand for environmental monitoring, research and application of CAN bus technology to build a distributed multi-variable environmental monitoring system, which an embedded core from the monitoring center and the PIC microcontroller as the core component of intelligent monitoring terminal, control center real-time monitoring of collection, analysis and processing of environmental information collected from the terminal, the control requirements based on user input, combined with the results of data processing, to the terminal sends control parameters, and breeding farms to monitor more than one poultry house.

Abstract: This system based on single-chip microcomputer control, with buttons and LCD monitor as the man-machine interface of numerical control dc power supply. System is mainly composed of rectification filter circuit, the output current control module, LCD display module current and voltage controlled constant current module. Button to SCM number controls the size of the output current DAC0832, LCD display the current value. This system controlled by single chip microcomputer DA output, make the whole circuit system has a stable output current, step precision is high, easy to control, etc.

Abstract: This paper introduced the structure and principle of DC servo motor, , derived its transfer function; combined BP neural network with PID control to achieve a composite control arithmetic, that fully embodies advantages of strong self-adaptive, robustness of neural network and high steady-state accuracy of PID controller, which improved the performance of DC motor servo system.

Abstract: With the rapid development of the electro-hydraulic servo control technology, the application of electro-hydraulic servo valve has become more and more widely. Servo amplifier is an important part of the electro-hydraulic servo control system to drive and control servo valve. This essay introduces the principle and the function of servo-amplifier, and designs a servo amplifier with the functions of proportional amplifier, zero adjustment, feedback and current limitation. The performance analysis and validation for the servo amplifier are carried out by using simulation software EDA .On the basis of the simulation, the servo amplifier is fabricated, and its performance is tested. The results indicate that the servo amplifier has features of stable current output, good linearity, rapid response, and fully meet designing requirements.

Abstract: With the continuous development of embedded technology and its application in the field of industrial control and more and more people's attention, and play an important role. With ARM processors as controllers, including human-computer interaction interface, DC power unit and its driver modules, load and drive modules section. ARM controller by a/d sampling speed to get the error signal, and then after a certain algorithm, by d/a converter to control DC motors, so as to achieve the purpose of controlling the speed. In addition, ARM controllers can also be set through the d/a converter load to facilitate research of DC motor speed control system of static and dynamic characteristics in different load. Research and development of DC servo motor control system based on ARM core of DC servo motor control is a relatively new field, is one of the control of DC servo motor trend.

Abstract: We designed and developed a test data interpreting system to improve the efficiency and accuracy of test data analysis of space power-source and to meet the challenge challenges of heavy productive task and mass product quality. The design took full thought of the characteristics of the aerospace product, actual test data obtained from the development, the product test goal, the composition and the basic requirements of the test data analysis. The system realized automatic data interpretation, multi-parameter interpretation, multidimensional time series interpretation and graphic curve display, demonstrating its rosy future in solving the problem of test data analysis in aerospace field.

Abstract: The double-circular-arc gear bearing capacity is the key problems for realizing the low speed and high torque work demands of small-diameter deep-well turbodrill reducer. Double double-arc gear shaft structure is adopted for improving the gear bearing capacity Based on the 2K-H-NGW type planetary gear transmission. Increase modulus and decrease teeth number properly can improve the double-circular-arc gear capacity on the premise of limited radial size. This article analyze the gear bending stress based on ANSYS and simulation results show that stress mainly concentrated on tooth root and tooth waist area and maximum loading is at tooth waist area. The simulation maximum bending stress is 289N/mm2 and the theoretical bending stress is 277.50N/mm2.The two results are basically identical. It is consistent with the actual work situation.