轉(zhuǎn)速可靠測量與精確控制是模擬原動(dòng)系統(tǒng)設(shè)計(jì)中的一個(gè)重要環(huán)節(jié)，關(guān)系到整個(gè)系統(tǒng)的
穩(wěn)態(tài)誤差和動(dòng)態(tài)響應(yīng)性能。根據(jù)M/T 法測速的基本原理，提出了一種模擬原動(dòng)系統(tǒng)中基于DSP 的電氣轉(zhuǎn)速測量的M/T 法實(shí)現(xiàn)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(jì)時(shí)和碼盤脈沖計(jì)數(shù)的同步，提高了速度反饋精確度，并使系統(tǒng)具有良好的動(dòng)態(tài)性能和魯棒性。實(shí)驗(yàn)表明，該方案準(zhǔn)確可靠，提高了系統(tǒng)的響應(yīng)時(shí)間且適用的測速范圍大。
關(guān)鍵詞：原動(dòng)機(jī)仿真；轉(zhuǎn)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