穩態性能英語怎麼說及英文單詞

❶ 英語論文翻譯

If the difference is positive and exceeds a threshold value, the modified method is selected to estimate the cutting force but the proportional constant is multiplied for about 0.2 second in order to consider the slip ratio.如果此差分是正的，並超過某一閾值，那麼選擇修改的方法來估計切削力，但比例常數被乘以0.2秒，以考慮進滑移率。The estimated cutting force from the synthesized monitor is illustrated in Fig. 2 with the measured signal. 由合成的監控器估計的切削力與實測信號一起圖示在圖2中。The estimation performance is satisfactory at the steady-state as well as at the transient state. 在穩態以及瞬態下的估計性能是令人滿意的。The cutting force in turning process needs to be controlled such that the cutting force is maintained at the reference value regardless of depth of cut, cutting speed, workpiece and tools. 在車削過程中的切削力需加以控制，這樣，不管切削深度、切削速度、工件和刀具如何，切削力都將保持在基準值。Because the cutting force cannot be easily measured, the estimated cutting force signal obtained in Section 3 is used for the turning force control.因為切削力不容易測量，所以在第3節中獲得的估計的切削力信號被用於車削力的控制。 In order to minimize the error between the reference and the estimated cutting forces, the size of the feed override is determined based on the three control strategies: PI control, adaptive control and finally, fuzzy logic control. 為了盡量減小基準切削力和估計切削力之間的誤差，進刀修調的大小要根據三個控制策略來確定：PI（比例積分）控制、自適應控制和模糊邏輯控制。The proposed turning force control system is constructed into the block diagram as shown in Fig. 3. 提出的車削力控制系統被構建成圖3所示的框圖。The main purpose of this section is to investigate the feasibility of utilizing the estimated cutting force for the turning force control, rather than to compare the control performance of the three strategies.本小節的目的是研究利用估計的切削力來控制車削力的可行性，而不是比較上述三種策略的控制性能。 Thus, the control performance using the estimated cutting force is compared to that using the measured force for each control strategy. 因此，利用估計的切削力進行控制的性能是與利用每種控制策略下的實測力進行控制的性能進行比較。Design of the PI controller requires a dynamic model of the turning process between the feedrate and the cutting force. PI控制器的設計需要車削過程中進刀速度和切削力之間的動態模型。 The turning process can be modeled into a first-order model [15] even if the model parameters, K, and T? 即使模型參數K和T，車削過程也可建模成一階模型【15】 ？（請注意：這一句和下面一句提問時原文有錯）can have different values depending on workpiece, tool, and cutting coditions.where a and f are the depth of cut and the feedrate, respectively 根據工件、刀具、和切削條件可以有不同的值。式中a和f分別是切削深度和進刀速度. A PI controller is designed from a nominal model and its gains are determined using the Ziegler-Nichols method. PI控制器是由標稱模型設計的，它的增益用Ziegler-Nichols 方法確定The feed override of the CNC lathe is in the range of 0-255%. CNC車床的進刀修調是在0－255％的范圍。The anti-winp regulation is added to the PI controller in order not to deteriorate the control performance when the override command is beyond the operation range. 為了在修調指令超出工作范圍時不劣化控制性能，在PI控制器中加入了抗飽和調節。The PI controller can be substituted for the control strategy block in Fig.3. 可以用PI控制器來替代圖3中的控制策略方框。In real turning process, parameters of the taming process model like Eq (10) are time-varying and nonlinear depending on cutting conditions, workpiece and cutting tools.在實際的車削過程中，像式（10）那樣的車削過程的參數根據切削條件、工件和切削刀具是隨時間變化的，而且是非線性的。 Thus, the control specifications such as stability cannot be guaranteed with the classical control approaches. 因此控制的技術條件，如穩定性，用傳統的控制方法是不能確保的。Many adaptive control schemes [5-10, 12, 15, 16, etc.] have been developed in order to overcome the above limitations.為了克服上述限制，人們開發了很多自適應控制方案【5－10，12，15，16等】。Because the main purpose of this section is to investigate the feasibility of using the estimated cutting force for the turning force control, a variable gain adaptive controller presented by Lin and Masory [16] is adopted but modified slightly so that the estimated cutting force can be utilized.因為本節的主要目的是研究利用估計的切削力來控制車削力的可行性，所以採用了Lin和Masory【16】介紹的可變增益自適應控制器，但是稍加修改，所以可以利用估計的切削力。
問題補充：The adaptive controller is composed of a force feedback loop where the estimated cutting force is compared to the reference value and is controlled by changing the feedrate in the integrated manner.自適應控制器由一個力反饋迴路組成，在這個迴路中估計的切削力與基準值進行比較，並通過以整體方式改變進刀速度來加以控制。()are variable controller gain and reference cutting force, respectively. （ ）分別是可變的控制器增益和基準切削力。In order to determine the controller gain, the static gain of the cutting process is estimated first assuming that the estimated cutting force is true.為了確定控制器增益，先假設估計的切削力是正確的，然後估計切削過程的靜態增益。 After the static gain is estimated, the controller gain, K., is adjusted to keep the open-loop gain constant. 在估計了靜態增益後，控制器增益K被調節而保持開環增益常數。The adaptation loop gains are selected to optimal values [16] so that the controlled system is stable and has optimal performance. 自適應迴路增益選為最佳值【16】，因此，受控的系統是穩定的，並具有最佳的性能。The control strategy block in Fig. 3 can be replaced by this adaptive controller.圖3中的控制策略方框可以用此自適應控制器取代。4.3 Fuzzy Logic Control4.3 模糊邏輯控制 Because the characteristics of the cutting force versus the feedrate are very nonlinear and time-varying, a fuzzy logic [22] is applied to the controller design. 因為切削力相對於進刀速度的特性是非常非線性的，而且是隨時間變化的，所以採用模糊邏輯【22】用於控制器設計。

❷ 穩態性能和穩定性區別

穩定性是動態性能，穩態誤差是穩態性能。

以下是穩定性的相關介紹：

穩定性是指「測量儀器保持其計量特性隨時間恆定的能力」。通常穩定性是指測量儀器的計量特性隨時間不變化的能力。若穩定性不是對時間而言，而是對其他量而言，則應該明確說明。穩定性可以進行定量的表徵，主要是確定計量特性隨時間變化的關系。

自動控制系統的種類很多，完成的功能也千差萬別，有的用來控制溫度的變化，有的卻要跟蹤飛機的飛行軌跡。但是所有系統都有一個共同的特點才能夠正常地工作，也就是要滿足穩定性的要求。

以上資料參考網路——穩定性