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Small size motorized spindle is widely applied in microscale machine tools (mMTs) in precise manufacturing. Spindle characteristics should be analyzed in machine tool design and optimization. Spindle -toolholder system is the weakest part in the whole machine tool. Precise 3D model of spindle is established to calculate deformation at the top of spindle using ANSYS. Natural frequency is also calculated...
This paper studies the loading problems of Multi-category Goods with priority, According to the characteristics of model, hybrid genetic simulated annealing algorithm is used to get the optimization solution. Firstly, adopt binary code so as to make the problem more succinctly. On the basis of cubage-weight balance algorithm, construct initial solution to improve the feasibility. Through adopting...
In recent years, hybrid systems theory and its applications have been focus researched. At first, commonly used models of hybrid systems research were classified overviewed, and then concept of hybrid systems theory were introduced. On the basis of this, analysis and optimization of hybrid systems were summarized in this paper. At last, the applications of hybrid systems theory in photovoltaic power...
In this article using ZigBee technology constructed the wireless sensor network (WSN) pressure monitoring system based on the CC2430 and NPI-15C-353AH pressure sensor, it also designed the wireless communication module and the data acquisition module of WSN nodes, as a result, it achieved a monitoring purpose which had low cost, low power consumption, high reliability and made system configuration...
To study the vibration of cab suspension, a commercial vehicle cab suspension model which contains cab, seat, suspension parts and vibration exciter was built with ADAMS. The vibration equations of the cab suspension were analyzed. The model was simulated under the continuous accelerated excitation and the accuracy was testified. Design of Experiment method was used to optimize the model. By matching...
For the sake of higher quality in sheet metal deep drawing, a non-axial symmetry part-automobile headlight reflector is taken as the research object. The objective function is obtained by approaching function of artificial neural network (ANN). Numerical simulation and multi-object genetic algorithms are adequately linked, whereafter, optimization model of variable blank holder force (VBHF) is established...
The loading condition of complicated structure is very sophisticated. The finite element method in doing mechanical loading analysis possesses certain limits because of the difficulty in modeling and mesh generation. The use of particle swarm optimization to improve the parameters of vector machine can avoid the blindness caused by men in selecting parameters, thus solving the problem produced by...
Grid-connected photovoltaic power system is not only related to solar battery and grid inverter technology, but also involves the system control and optimization problem. The research and improvement about control technology play a vital role in improving the efficiency of the system and Realizing optimization grid. On the basis of considering about control requirements in grid-connected photovoltaic...
In order to improve the performance of the car, the paper mainly introduces the use of fuzzy algorithm for the best match of automotive power train parameters, The author mainly explains the optimized theory and a computer simulation program is developed. Moreover, the author discusses the problems occurring in the object and gives the methods to solve them. The result of simulation is analysed.
The system start with 6 opening of dagushan mineral separation factory NO 08 substations. the high and low voltage electrical equipment-large and medium capacity load of hyperbaric chamber and the electromagnetic station are looked as the main control object, setting up a reasonable charge collection point, using the current / voltage sensors and digital power meter as the main testing device, using...
This paper analyzed the method of calculating work resistance and consumed power in hydraulic system in a work cycle of loader, established mathematical model of work resistance, and selected the CYC_TEST_10sec as a work cycle. Based on the simulation software of power performance and fuel economy of loader, we designed the interface mode between simulation software and optimization algorithm. To...
Support Vector Machine theory was originally aimed at two types of pattern recognition problems raised. In the area of construction vehicle, a wide range of shift decision becomes more popular. In this paper, authors presented shift decision algorithm which was based on SVM binary tree multi-class classification. It distributed classifier to every node for constructing the multi-class SVM, and the...
According to the requirements of the HEV for frequent start-stop, power feed-back, low speed high torque in climbing, boosting in accelerating and high efficiency, this paper proposes a motor drive system based on variable structure control. During different running states, three different DTC methods are applied. In middle and high speed, the traditional DTC is used; in the sub-low-speed, increasing...
In order to solve the “premature convergence” and inefficiency during the following period of the evolution, an improved genetic algorithm was presented. Then we took ceramic body as example, and we established the mathematical model of multi-objective optimization for ceramic body formula by parallel selection. After experimental verification, this method produces the results with high precision...
A method for estimating the upper and lower bounds of the real and imaginary parts of eigenvalues of the closed-loop systems is presented by combining the first-order matrix perturbation and optimization. The presented method is called iterative perturbation method. The proposed method is accurate relative to the first-order matrix perturbation method and efficient relative to the second-order matrix...
In view of serious cache missing of each macro block of MPEG-4 (Moving Picture Experts Group-4) video encoder in transmission and the video sequence frame rate is low, We proposed the motion estimation algorithm optimization, Cache optimization, SAD ( Sum of Absolute Difference) and pixel interpolation optimization, data removal using EDMA (Extended Direct Memory Access) , and it has enhanced memory...
Air separation unit are widely used in industry, air pre-cooling system is a very important part in the air separation unit. This article explains the work flow of the pre-cooling system and the influence of the pre-cooling system outlet air temperature on molecular sieve and air separation system, and discusses the pre-cooling system of the air separation unit temperature control system optimization.
Fixed point theorems have many applications in economic analysis, optimization, nonlinear programming and engineering sciences. In this paper, the well-known Brouwer fixed point theorem is discussed to a class of nonconvex sets. We modified the homotopy path-following algorithm and hence make the modified method be able to solve Brouwer fixed-point problems easily.
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