Research On Dynamic Measuring System Equality Design Theory And Technology Based On Accuracy Loss

The level of measurement technology is the important evaluation standard for technology development of a country. Development of science and technology is the drive force and source of promoting accuracy and the improvement of instrument accuracy has provided new material condition and research measure for science and technology development.With the increasing development of science and technology, precise engineering has a increasingly high demand for accuracy. In order to reliably guarantee the accuracy and realize the goal of low cost, the measure of increasing the accuracy of equipment is not suitable. Adopting the low-cost theory of modern accuracy guarantee and technology has become the field of hot research in and out of China. Meanwhile, accuracy theory is one of the basic theories guiding product design, manufacturing and measurement. Making full use of accuracy theory to guide product design and manufacture is the basis and shortcut to create the favorable and the measure to increase the product level and competitiveness. Applying accuracy theory to design, manufacture and measurement is the specific measure to strengthen the country and enterprises, and the effective method to ensure and improve the product quality.Even if the influences of environment factors are not considered, the accuracy of measuring system, especially with mechanical structure, will decrease in the process of actual use. Moreover, the influence of each inner unit of the system on the total accuracy loss is different. The final purpose and meaning of this theory study is to provide the theoretic groundwork for the design of manufacture's losing equality. Not to follow the loss equality principle, it will happen that some parts can not work longer, while some other parts have good situation. It will waste a lot. Then, the dynamic measurement system is designed according to a principle of equality life design. It makes every error source simultaneous loss for the most efficiency. Obviously, it will have outstanding scientific interest and practical economic significance.This project is from higher university doctor subject special research foundation project "Uniform design theory and technology basis research of dynamic measuring system based on accuracy loss"(No. 20040359011) and part of NSFC (50675057) .Main content and work of this paper include the following aspects:1. Studying and deepening the theory and method of dynamic accuracy loss decomposition and tracing. Based on whole-system dynamic accuracy theory, analyze and compare the former methods of dynamic accuracy loss decomposition and tracing, and put forward their characteristics and practicability.2. Study accuracy loss of dynamic measuring system. Analyze accuracy loss rule of dynamic measuring system, found its trend model, and Study modeling methods, such as BP NN and LS-SVM. 3. Research the loss equality principle theory of dynamic measuring system. Based on accuracy loss modeling, analyze all buildups' inequality of dynamic measuring system, found every accuracy loss right and inequality accuracy loss parameter. Then, put forward optimizing method based on accuracy loss unit right, set up the accuracy loss equality theory and method.4. A set of accuracy loss experiment system is developed according to the actual research. For the sake of validate the former theories and methods, design a set of dynamic measuring experiment system.Base on the accuracy loss, accuracy loss equality theory and method can make manufacture possess more market advantage, realize economy of society energy sources and persistence development.