Applied Mechanics and Materials Vols. 602-605

Abstract: This paper reports on the experiments undertaken to determine the luminance of control panel assembly (CPA) and push button annunciate (PBA) in cockpits when operated in low and high ambient environment. Referring to the varying ways of commercial airplanes are illuminated, different levels of luminance are chosen to be tested. Psychology scales that measure comfort and legibility when under illumination are used as the two main evaluation indexes, which reflecting the performance of CPA and PBAs with different luminance levels according to the observers’ evaluation scores. 21 observers participated in the study, in which they were asked to give certain assessment. The results suggest that for both fully dark environment and the environment that only has light from the working displays, 0.4fl is the preferable luminance for CPA. For PBAs of different colors, the preferable luminance range is also different.

Abstract: Through research of vehicle dynamic feature, analysis and research of the problem of driving wandering by user retroactions, the article put forward some test and evaluation methods of driving wandering. And the article is discussed about main reasons and solutions of driving wandering in-depth.

Abstract: According to the character and generation mechanism of railway cutting sub-grade diseases, following the needs of YUN-GUI express railway construction, based on the results of laboratory and field test of expansive soil engineering characteristics, developed new waterproof material, designed waterproofing and drainage system of cutting sub-grade, and full-scale dynamic model test was carrying out, a cycle load with 4Hz frequency and 4000 thousand times excitation was imposed on the sub-grade model under three kinds of working condition (dry, raining and underground water rising). The results indicate that: no cracks appeared on the surface of semi-rigid waterproof layer, its durability is good. Waterproofing and drainage system of cutting sub-grade works well under combined action of long term cycle load and complicated environment. Research results possess important engineering reference value.

Abstract: Based on a roadway project of Dongqu Colliery of Xishan Coal and Electricity Group,using the geological exploration data and on-site research and referring to the theory and engineering experience, the tunnel grouting program for marl was worked out and it was revised the program in the construction. A method of grouting for soft rock in roadway construction was summarized ,getting a good results and verified by numerical simulation.

Abstract: With the rapid development of network technology, communication technology and multimedia technology, and robot technology is getting mature, network control robot system has gradually become a main direction of current robot research. Network based robot refers to the public through the network and the control operation of the robot Shi Yuancheng. Study on the idea of network robot is the network technology and robot technology integration together, through the network to control the robot. In the network of the robot, machine vision plays a more and more important role. To a strange environment of robot control, observed the function of an image. Machine vision can not only according to the characteristics of image recognition, robot path, but also can provide visual understanding of the observation space to strange environment and to control the robot. It is also belongs to the field of robot visual category for image transmission and processing technology on the essence of robot network control. The vision system of robot is a machine vision system, refers to the use of computer to realize the vision function of the people, is to use computer to achieve the objective of 3D world understanding.[5] The so-called three-dimensional understanding refers to the observed object shape, size, texture and motion feature distance, leaving on the understanding of the concept of robot design.

Abstract: As computer control theory has developed for more than ten years, combined with the wide application of networked telecommunication technology, design of modern control system has embarked on a Internet control system.Due to uncertainty of outer environment, dispersion of space structure, multiplicity of controlling target as well as complexity of target system, modern industrial system requires more for contemporary controlling theory and the former design method never meets the satisfaction of industrial large-scale production. Based on the rapid development of field bus technology, Internet controlling system design takes advantage of the regional dispersion, information’s fullness and modules in hardware devices in terms of modern controlling system. By this means can more complex controlling algorithm and advanced coordination strategy be realized in an effective way. In view of Agent ideas, to utilize communication of information as well as coordination and cooperation, intelligence and flexibility are able to be realized in the process of designing a complicated and efficient system.

Abstract: Gyroscope is the key component in an Inertial Navigation System (INS). It depends on the precision of the INS. The nonlinear random drift error model based on autoregressive (AR) and genetic programming (GP) was established. The linear model is established based on AR technique. After that, the nonlinear model is built based on GP technique. The result indicates that the square error of the random gyro drift is reduced by 74.5%. The hybrid modeling method can effectively compensate the random gyro drift and improve the stability of the system.

Abstract: The 6-DOF parallel platform has a strong carrying capacity, good structural stability. But it also has problems such as high cost, complexity of controlling and so on. The traditional process of forward solutions for 6-DOF parallel platform is complex and there is no fixed formula for solving this kind of nonlinear problems. The commonly used method is numerical analysis method which is solving slowly and has a large amount of calculation. Although neural networks and fuzzy control can be very good at nonlinear mapping, its calculating speed will affect real-time control and simulation results. Therefore, this paper based on existing neural network calculation method, proposing a new method for calculating the best number of neural network’s hidden layer’s nodes and the bubbling contraction algorithms for the 6-DOF platform forward solutions. From two perspectives can this paper improved control performance on the 6-DOF platform, and finally this paper gives its Matlab and Simulink simulation model design for further research.

Abstract: Digital PID control is one of the most widely used control methods in the manufacturing process. Based on the analysis of PID control algorithm, the system has designed and simulated the incremental PID controller using the LPM macro module built-in FPGA,and also designed the PWM module. The combination of two modules can be used for a variety of applications. The results show that the design is feasible and correct.

Abstract: For the steering engine fault of ducted fan UAV that may arise during the hovering, designing adaptive controller for attitude control. First, concentrating on modeling of the hovering state of ducted fan UAV, and getting the relationship between steering engine and attitude control. Then analyzing the impact of steering engine fault on the attitude control system basing on the control model. Finally, designing model reference adaptive controller basing on the fault model, so that the ducted fan UAV can maintain good attitude control if steering engine fault occurs during the hovering. Simulation results show that when steering engine fault occurs, the model reference adaptive controller can effectively inhibit the adverse effects brought by steering engine fault, so the attitude control system has strong adaptability and robustness.