Applied Mechanics and Materials Vols. 602-605

Abstract: Through the design and analysis of arc welding robot simulation system, the theory and method for establish 3D simulation system based on OpenGL in VC++.NET’s development platform was Expounded. In this paper, The kinematics model of 5 degree of freedoms arc welding robot is established and the equation straight and the inverse operation is provided and the 3D of the robot real-time simulation is realized. The test results show that, the system has friendly interface and achieved good simulation effect.

Abstract: This paper presents a simplified theoretical model for piezoelectric motor based on synchronized switching control. The influence from driving voltage, duty cycle and load to the stepping motion and velocity of the motor was analyzed in this study. It proved that the step size is a function of the driving voltage and the velocity of the motor decreases with an increased load and reduced duty cycle on macro point of view.

Abstract: The current system for thermal power system operation stability ball mill, poor uniformity of pulverized coal that often occurs overpressure, breaking coal, over-temperature phenomena such as coal or blocking rational analysis, the use of predictive control, self-optimizing control the principle of the system is to optimize the steel mill, and combined with its control system elaborated feasibility optimized implementation.

Abstract: In order to solve the problem of the traditional AMD(Active Mass Drive system), the DDVC(DAMD,Direct Driving Volume Control) AMD is presented in this paper. Firstly, the mathematical models of the electric motor, hydraulic power system and the hydraulic actuators are constructed respectively. Then, the whole model integrated with different parts is analyzed. Finally, the critical factors which can affect the dynamic characteristics are introduced by using numerical simulation. The results show that the new system has a good performance.

Abstract: The servo control methods of motion configuration are researched. Based on analysis for characteristic of the motion configuration, the control strategy and control law used on the motion control system are presented. The controllers are respectively designed by frequency correcting method and normal control method which belongs to classical control theory. Sliding mode variable structure control method is presented for location control law designing, so that the problem of location control loop low velocity creeping is solved, and a simulating experimentation demonstrate the effectiveness of the proposed approach.

Abstract: Fuzzy rules and its inference mechanism are the assurance of achieving feature fusion. Conventional Proportional Integral Derivative (PID) control is often used in present industrial field. Because the control parameters are fixed, the tuning results are difficult to meet the demands and the system is unstable or even out of control. This paper has a design and analysis on the dual thumb pneumatic flexible robot hand base on the active flexible bending joints we have developed. The flexible joint is composed of four elongation artificial muscles with parallel arrangement. The robot hand has five multi-actuated fingers each with three flexible joints. In this paper, Matlab is used to confirm that the fuzzy control system has good adaptability and anti-jamming capability.

Abstract: Landmark feature match method of robot visual navigation has been studied, An unsupervised learning methods based on binocular vision has been proposed to match Landmark feature fast. Firstly, environmental Information images are obtained by binocular vision, Then SIFT feature vectors are abstracted from binocular vision images, Lastly, Self-Organizing Map is pulled in to match multidimensional feature point fast by using competitive learning methods. Experiments showed that the proposed methods on feature matching with better computation time and effect than the traditional SIFT and SURF of feature matching methods. And it can satisfied the requirement of real-time.

Abstract: Most research about the approaching aircraft sequencing is for single runway approach or standard parallel runways approach. Little of research is for the case of staggered parallel runways approach. In this paper, a mathematical model of aircraft approach sequencing is established for the case of staggered parallel runways approach, and also this model is optimized with improved genetic algorithm. This model is simulated with the improved genetic algorithm both for cases of non-staggered runway approach and staggered runway approach, and the result shows that, comparing with the situation of non-staggered runway, the delay time in the case of staggered parallel runways approach decreases by 1.6 minutes, and the fitness increases by 0.0394. It proves that, in a certain extent, staggered parallel runways can reduce the minimum interval between arrival flights, thus increase the capacity of parallel runways.

Abstract: Power amplifier for maglev flywheel control system should have the characteristics of low ripple and fast response. In this paper, a maglev flywheel and a method of two-level power amplifier based on DSP and FPGA are proposed. An equivalent model of switching power amplifier based on Fourier series is established and simulation analysis is carried on as well. Experimental platform for switching amplifier is built and experiment results show that the coil current signal can track command signal fast and stably, which proves the validity of the proposed design method. Simulation results are close to the experimental result, which means that the model can guide the power amplifier design.

Abstract: A half tracked vehicle model was established based on LMS, a co-simulation interface between control algorithm of MATLAB and physical model of LMS was set up. Fuzzy controller with PID regulator was proposed to achieve controlling strategy based on half tracked vehicle model. With suspension stroke and its change rate as input parameters of fuzzy controller, the dynamic adjusting parameters of PID controller are acquired through fuzzy controller, then a semi-active suspension vehicle adaptive control system was formed. The simulation result shows that the adaptive control system can effectively coordinate the contradiction acceleration and dynamic travel in different bands, the ride comfort tracked vehicle is significantly improved.