步進電機的振蕩、不穩(wěn)定以及控制--------外文翻譯.doc
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步進電機的振蕩、不穩(wěn)定以及控制--------外文翻譯,abstract. a novel approach to analyzing instability in permanent-magnet stepper motors is presented. it is shown that there are two kinds of unstable phenomena ...
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Abstract. A novel approach to analyzing instability in permanent-magnet stepper motors is presented. It is shown that there are two kinds of unstable phenomena in this kind ofmotor: mid-frequency oscillation and high-frequency instability. Nonlinear bifurcation theory is used to illustrate the relationship between local instability and midfrequency
oscillatory motion. A novel analysis is presented to analyze the loss of synchronism phenomenon, which is identified as high-frequency instability. The concepts of separatrices and attractors in phase-space are used to derive a quantity to eva luate the high-frequency instability. By using this quantity one can easily estimate the stability for high supply frequencies. Furthermore, a stabilization method is presented. A generalized approach to analyze the stabilization problem based on feedback theory is given. It is shown that the mid-frequency stability
and the high-frequency stability can be improved by state feedback. Keywords: Stepper motors, instability, nonlinearity, state feedback.
1. Introduction
Stepper motors are electromagnetic incremental-motion devices which convert digital pulse inputs to analog angle outputs. Their inherent stepping ability allows for accurate position control without feedback. That is, they can track any step position in open-loop mode, consequently no feedback is needed to implement position control. Stepper motors deliver higher peak torque per unit weight than DC motors; in addition, they are brushless machines and therefore require less maintenance. All of these properties have made stepper motors a very attractive selection in many position and speed control systems, such as in computer hard disk drivers and printers, XY-tables, robot manipulators, etc.
摘要：本文介紹了一種分析永磁步進電機不穩(wěn)定性的新穎方法。結(jié)果表明，該種電機有兩種類型的不穩(wěn)定現(xiàn)象：中頻振蕩和高頻不穩(wěn)定性。非線性分叉理論是用來說明局部不穩(wěn)定和中頻振蕩運動之間的關(guān)系。一種新型的分析介紹了被確定為高頻不穩(wěn)定性的同步損耗現(xiàn)象。在相間分界線和吸引子的概念被用于導(dǎo)出數(shù)量來評估高頻不穩(wěn)定性。通過使用這個數(shù)量就可以很容易地估計高頻供應(yīng)的穩(wěn)定性。此外，還介紹了穩(wěn)定性理論。廣義的方法給出了基于反饋理論的穩(wěn)定問題的分析。結(jié)果表明，中頻穩(wěn)定度和高頻穩(wěn)定度可以提高狀態(tài)反饋。
關(guān)鍵詞：步進電機，不穩(wěn)定，非線性，狀態(tài)反饋。
1. 介紹
步進電機是將數(shù)字脈沖輸入轉(zhuǎn)換為模擬角度輸出的電磁增量運動裝置。其內(nèi)在的步進能力允許沒有反饋的精確位置控制。 也就是說，他們可以在開環(huán)模式下跟蹤任何步階位置，因此執(zhí)行位置控制是不需要任何反饋的。步進電機提供比直流電機每單位更高的峰值扭矩;此外，它們是無電刷電機，因此需要較少的維護。所有這些特性使得步進電機在許多位置和速度控制系統(tǒng)的選擇中非常具有吸引力，例如如在計算機硬盤驅(qū)動器和打印機，代理表，機器人中的應(yīng)用等.
oscillatory motion. A novel analysis is presented to analyze the loss of synchronism phenomenon, which is identified as high-frequency instability. The concepts of separatrices and attractors in phase-space are used to derive a quantity to eva luate the high-frequency instability. By using this quantity one can easily estimate the stability for high supply frequencies. Furthermore, a stabilization method is presented. A generalized approach to analyze the stabilization problem based on feedback theory is given. It is shown that the mid-frequency stability
and the high-frequency stability can be improved by state feedback. Keywords: Stepper motors, instability, nonlinearity, state feedback.
1. Introduction
Stepper motors are electromagnetic incremental-motion devices which convert digital pulse inputs to analog angle outputs. Their inherent stepping ability allows for accurate position control without feedback. That is, they can track any step position in open-loop mode, consequently no feedback is needed to implement position control. Stepper motors deliver higher peak torque per unit weight than DC motors; in addition, they are brushless machines and therefore require less maintenance. All of these properties have made stepper motors a very attractive selection in many position and speed control systems, such as in computer hard disk drivers and printers, XY-tables, robot manipulators, etc.
摘要：本文介紹了一種分析永磁步進電機不穩(wěn)定性的新穎方法。結(jié)果表明，該種電機有兩種類型的不穩(wěn)定現(xiàn)象：中頻振蕩和高頻不穩(wěn)定性。非線性分叉理論是用來說明局部不穩(wěn)定和中頻振蕩運動之間的關(guān)系。一種新型的分析介紹了被確定為高頻不穩(wěn)定性的同步損耗現(xiàn)象。在相間分界線和吸引子的概念被用于導(dǎo)出數(shù)量來評估高頻不穩(wěn)定性。通過使用這個數(shù)量就可以很容易地估計高頻供應(yīng)的穩(wěn)定性。此外，還介紹了穩(wěn)定性理論。廣義的方法給出了基于反饋理論的穩(wěn)定問題的分析。結(jié)果表明，中頻穩(wěn)定度和高頻穩(wěn)定度可以提高狀態(tài)反饋。
關(guān)鍵詞：步進電機，不穩(wěn)定，非線性，狀態(tài)反饋。
1. 介紹
步進電機是將數(shù)字脈沖輸入轉(zhuǎn)換為模擬角度輸出的電磁增量運動裝置。其內(nèi)在的步進能力允許沒有反饋的精確位置控制。 也就是說，他們可以在開環(huán)模式下跟蹤任何步階位置，因此執(zhí)行位置控制是不需要任何反饋的。步進電機提供比直流電機每單位更高的峰值扭矩;此外，它們是無電刷電機，因此需要較少的維護。所有這些特性使得步進電機在許多位置和速度控制系統(tǒng)的選擇中非常具有吸引力，例如如在計算機硬盤驅(qū)動器和打印機，代理表，機器人中的應(yīng)用等.
