preset signal 中文意思是什麼
preset signal
解釋
預置信號-
There are two ways to enhance the radar ' s detection performance : ( 1 ) for certain signal to noise ratio, choose a optimum detection threshold, whose false decisions producing minimum cost under the preset cost rules ; ( 2 ) basically reduce the false decision probability by increasing echo ' s snr
雷達在噪聲背景中檢測信號是一個概率問題，提高雷達的檢測能力可歸結為如下兩個途徑： （ 1 ）在信噪比一定的情況下，選擇一最佳門限，使其在一定風險準則下錯誤判決產生的「代價」最小。 （ 2 ）提高回波信號的信噪比，從根本上減小錯誤判決的概率。 -
Sync check relay a sync check relay is an electrical device that monitors the phase relationship between two voltage sources and provides a signal when the voltage sources are within specific preset parameters
同步檢查繼電器同步檢查繼電器是監測兩個電壓源之間的相位關系的電氣設備，如果電壓源間的關系在預定的參數范圍內，它就會發出相應信號。 -
The fifth chapter experiments on the cushioning performance of the three sets of systems with pid / pdf algorithm. mainly on how to influence the systems cushioning performance while changing the preset input signal frequency and the load mass. and on the systems " repeatability. reappearance and the stability. additionally this chapter compares the pid algorithm with the pdf algorithm in their influence on system cushioning performance. the final experiment results testifies that the thesis successfully realizes the expected cushioning effects of the three different sets of high - speed pneumatic system
第五章對pid 、 pdf控制策略系統緩沖性能進行了實驗研究，主要研究了給定輸入信號頻率的改變對系統緩沖性能的影響、長時間工作時系統的重復性和再現性以及不同負載質量下系統的緩沖性能的實現；同時比較了pid 、 pdf控制策略對系統緩沖性能的影響。最後實驗結果表明，本課題用pid 、 pdf策略很好的實現了三套不同類型的高速氣動系統的緩沖，緩沖效果是很不錯的。 -
When the data recorded reaches the preset value, it ' ll generate a low electrical signal to make the led emitting as an alert signal until being reset manually by pressing the reset button
當計數值達到預定值時，它產生一個低電平通過發光二極體報警，直到人工使用復位按鍵復位后報警才停止。 -
The mixed control chip sg3525a combined with hardware pi controller generates the high - frequency pwm pulse for the first inverter. the digital control block tms320lf2407a mainly provides current preset for constant - current source through the outer filter, pwm pulse for the second inverter and drive signal for the high - frequency pulse power supply
其中變極性電源的一次逆變pwm信號由pwm發生晶元sg3525a ，配以外部硬體電路pi調節器產生;一次逆變閉環控制迴路的電流給定（配以外部濾波） 、二次逆變pwm驅動以及高頻脈沖電源的控制則由tms320lf2407a數字控制器實現。
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