外文翻譯--數(shù)字濾波器的仿真與實現(xiàn)-其他專業(yè)(編輯修改稿)
2025-02-24 10:10 本頁面
【文章內(nèi)容簡介】 ectricity system protection and secondary puter control, many signal processing and analysis are based on are certain types sinusoidal wave and the second harmonics of the system voltage and current signals (especially at D process), are mixed with a variety of plex ponents, the filter has been installed power system during the critical ponents. Current puter protection and the introduction of two digital signal processing software main filter. Digital filter design using traditional cumbersome formula, the need to change the parameters after recalculation, especially in high filters, filter design workload. Uses MATLAB signal processing boxes can achieve rapid and effective digital filter design and simulation. MATLAB is the basic unit of data matrix, with its directives expression mathematics, engineering, monly used form is very similar, it is used to solve a problem than in MATLAB C, Fortran and other languages End precision much the same thing. The popular MATLAB internal function with the main pack and 30 types of tool kits (Toolbox). kits can be divided into functional tool kits and disciplines toolkit. MATLAB tool kit used to expand the functional symbols terms, visualization modeling simulation, word processing and realtime control functions. professional disciplines toolkit is a stronger tool kits, tool kits control, signal processing tool kit, tool kits, etc. belonging to such munications MATLAB users to open widely weled. In addition to the internal function, all the packages MATLAB tool kits are readable document and the document could be amended, modified or users through original program the construction of new procedures to prepare themselves for kits. Digital filter design Digital filter design of the basic requirements Digital filter design must go through three steps : (1) Identification of indicators : In the design of a filter, there must be some indicators. These indicators should be determined on the basis of the application. In many practical applications, digital filters are often used to achieve the frequency operation. Therefore, indicators in the form of general jurisdiction given frequency range and phase response. Margins key indicators given in two ways. The first is absolute indicators. It provides a function to respond to the demands of the general application of FIR filter design. The second indicator is the relative indicators. Its value in the form of answers to decibels. In engineering practice, the most popular of such indicators. For phase response indicators forms, usually in the hope that the system with a linear phase frequency bands human. Using linear phase filter design with the following response to the indicators strengths： ① it only contains a few algorithms, no plural operations； ② there is delay distortion, only a fixed amount of delay。 ③ the filter length N (number of bands for N1), the volume calculation for N/2 magnitude. (2) Model approach : Once identified indicators can use a previous study of the basic principles and relationships, a filter model to be closer to the target system. (3) Achieved : the results of the above two filters, usually by differential equations, system function or pulse response to describe. According to this description of hardware or software used to achieve it. Introduction of DSP Today, DSP is widely us
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