基于dds和單片機(jī)數(shù)字控制信號(hào)發(fā)生器的設(shè)計(jì)外文翻譯、中英對(duì)照、英漢互譯-文庫吧在線文庫
【正文】 tepbystep adjustment of frequency, dutyfactor, extent and phase. d. The operation of the touching screen includes suppositional keyboard, sliding strip and various suppositional control carry out entering operation, and the every parameters can be demonstrated visually. e. Stepbystep automation, definition of: maximum value , minimum value , stepbystep rate , stepbystep amounts , ascending or lapse, cycling or not. Numerical control reform advantage of signal source The designed numerical control signal source is applied to the lathe reform experiment. The main targets of the numerical control system are the coordinate axis displacement (including displacement speed , direction , location etc.) , the control message originates from numerical control treating or moving control procedure mainly. Therefore, systematic the most fundamental position of the numerical control system should include three parts: The input/output procedure device, numerical control equipment and the servo drives. Conclusions Making pound use of DDS and MCU controller, the system can exported the numerical control signal source as the consumer need, it has the merits such as good exporting wave form, frequency accuracy, reliable stability and high dutyfactor. Each parameter and be easily adjusted by touching a screen, the experiments show that the various parametric indexes have fine numerical control effect. Acknowledgements This work was financially supported by the National Natural Science Foundation of China (No: 61006075) and Guided Projects on Integration of Production, Education and Research of Guangdong Province (No： 2020B090400253). References [1] Lygouras J. N., Tarchanidis K. N., Tsalides Ph. G., “Suspended Sediment and Dye Concentration Measurements Using a Digital Techniques”, Int. J. Electronics, 87, , pp 107, (2020). [2] Webster J. G. Ed., “Tactile Sensors for Robotics and Medicine”, Wiley, New York, (1988). [3] Dally J. W., Rilley W. F., Mcconnel ., “Instrumentation for Engineering Measurements”, Wiley, New York, (1993). [4] Tarchanidis K. N., Ioannidis I. N., Kakkalis I. K. And Lygouras J. N., “FLEXIMAT, an Integrated System Scanning the Bending of Any Matress.”, Int. Workshop on Virtual and Intelligent Measurement Systems, VIMS 2020, Annapolis, MD, USA, 2930 April 2020, pp 115, (2020). [5] Koukourlis C. S., Voulgaris N. C., “A Digital Method for Sinewave Generation.” Archiv fur Electrotechnik, 72, pp 327, (1989). [6] Koukourlis Chr. S, Trigonidis V. K., Sahalos J. N., “Differential Synchronous Demodulation for Small Signal Amplitude Estimation.”, IEEE Instrumentation and Measurement, 42, No. 5, pp 926, (1993). 基于 DDS 和單片機(jī)數(shù)字控制信號(hào)發(fā)生器的設(shè)計(jì) 關(guān)鍵詞 : DDS。 M accumulated step length of phase register, constant。 MCU。s etc. by numerical control circuit, the system making use of this method has many merits such as stability, reliably and accuracy. The mercial DDS chip can only export a sine wave for the data in the ROM form already has been solidified. If needing to e into being any wave form, it may e true by the way that FPGA adopts DDS IP core or hardware describe language etc, however,the cost of This way cost is high。 (b) filtering circuit Amplification and wave filtering circuit The amplification circuit will export amplified wave form and modify the factor of amplification. An excellent smooth output waveform can be achieved by using the lowpass active power filtering. The amplification circuit and the filtering circuit is showed in Fig. 4. Software design And the system software mainly include AD9850 driving module, DAC0832 driving module, the stepbystep automation module, PWMconvertingDA module and uC/GUI figure supporting system implanted in procedure. The operation interface is full of humanization for the multiwindow pattern is adopted. The desi
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