轉速可靠測量與精確控制是模擬原動系統設計中的一個重要環節，關系到整個系統的
穩態誤差和動態響應性能。根據M/T 法測速的基本原理，提出了一種模擬原動系統中基于DSP 的電氣轉速測量的M/T 法實現方式，介紹了基本硬件組成及軟件流程。該方法通過DSP的捕獲功能，確保測速的計時和碼盤脈沖計數的同步，提高了速度反饋精確度，并使系統具有良好的動態性能和魯棒性。實驗表明，該方案準確可靠，提高了系統的響應時間且適用的測速范圍大。
關鍵詞：原動機仿真；轉速測量；M/T 法；TMS320LF240
Abstract: The dependable measurement and the accurate control of the rotational speed is an
important part during the design of the prime movers simulated system. Which will influence the stable errors and the dynamic response function? According to the basically principles of the M/T speed measurement methods, the thesis proposes a kind of M/T method realizing way in the prime movers simulated system based on the DSP electric rotational measurement, introduces the basic hardware organization and the software process. This method makes full use of DSP resources and ensures synchronous counting for time and encoder pulses, which improves the accuracy of speed feedback and makes the system, has good dynamic function and robustness. Its reliability and accuracy are verified by experiment result.
Key words: simulation of prime mover; rotational speed measuring; M/T method; TMS320LF240