coulomb friction 中文意思是什麼
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Fist of all, on the basis of the research of agone boffins, this author investigates the interaction mechanism of bolts and rock, and introduces the elastic ? lastic analytical resolution which is consist of the liner structure, the equivalent reinforced wall rock and the original wall rock in the simple loading from the equivalent well - proportioned view ; this solution is very important meaning for the engineering design. on the basis of coulomb friction model, the author introduces the finite element equation of the contact problem in order to provide the academic foundation for the application of msc. marc. finally, combining the engineering practice of the non - linear analysis of shield tunnel through yellow river of the south - north water transfer and using the model of friction, the author researched the evolution law of stress and displacement field in the structure of grouted rock bolts, and analyzed the effect to the stress and deformation of surrounding rock mass due to anchor supports
首先，在前人研究成果的基礎上，對錨桿與圍巖的相互作用機理進行研究，利用全長錨固錨桿的中性點理論，從等效均化的角度來考慮錨桿對圍巖的加固作用，並推導了在簡單荷載作用下，含有襯砌、等效加固后的圍巖、原始圍巖三者的彈塑性解析解，對工程設計有著重要的參考意義；在數值模擬方面，以考慮錨固圍巖滿足規則化庫侖摩擦模型為基礎，利用虛功原理推導了接觸問題的有限元方程的計算格式，為開發運用大型商用有限元軟體msc . marc提供了理論根據，也形成了本文的理論基礎：最後，論文以南水北調東線穿黃隧洞穩定性分析項目為工程實例，利用本文所述的接觸問題的摩擦模型理論，對錨桿支護結構的應力場、位移場的變化規律進行了研究，分析了加錨支護對隧洞圍巖應力、變形的影響。 -
In the end, the stability is discussed under the coulomb friction model, getting the normal force compensation method and the additive vibration control method, which are to stabilize the friction drive system to realize the controllability and stability, which is simple to realize in the micro manipulator
並通過對coulomb摩擦模型的穩定性討論，得出正壓力補償控製法，即以穩定摩擦力驅動摩擦振子實現微操作手運動的可控性及穩定性的方法分析。通過數值方法驗證正壓力補償控製法的適用性，為微操作器的運動控制提出可行方法。 -
A method is provided to measure the friction parameters of the bed. the maximum friction torque, coulomb friction torque, viscous friction coefficient and moment of inertia can be gotten by fitting the free reduced rate curve of the gimbals and measuring the motor current when the motor begins to rotate
提出了一種測量轉臺摩擦特性的方法，通過對轉臺在無外推力作用下的速度衰減曲線的擬合以及電機啟動過程電流和轉速的測量，可以得到最大靜摩擦力矩、庫侖摩擦力矩、粘滯摩擦系數及轉動慣量。 -
The model from the input to the output of the piezoelectric traveling wave ultrasonic motor is established by synthetically using lagrange - maxwell equation, hertz elastic contact theory and coulomb friction theory, along with considering electromechanical coupling, influence of the interface force between the stator and rotor of the motor on the amplitude of the traveling wave inside the stator and dynamic contact friction friction force
利用拉格朗日?麥克斯韋方程以及赫茲彈性接觸理論，庫侖摩擦理論，考慮機電耦合效應，定、轉子間界面力對彎曲行波的影響及其動態接觸摩擦力，建立了壓電行波超聲波馬達從輸入到輸出的機電耦聯系統的數學模型。 -
Against two kinds of nonlinear friction observers, the analytic expression of zero ve - locity interval t based on the nonlinear model of brushless dc motor system is deduced in this paper. simulation results indicate that the system performance at low velocity can be im - proved effectively using the friction observer based on coulomb friction model
針對兩種不同的非線性摩擦觀測器，推導了基於無刷直流電動機非線性模型的零速度時間間隔腡解析表達式，通過模擬證實，利用基於庫侖摩擦模型的摩擦觀測器可以有效地改善系統的低速控制性能。 -
Presents a simple method of compensating friction against the character of the nonlinear model of a brushless dc motor system which transfers the original system model to a simple linear model using the method of input - output linearization, and estimates the coulomb friction in the system in real - time using a nonlinear friction estimator, and then compensate the friction in the system using a friction feedforward, and concludes from simulation results that this method can effectively eliminate the influence of friction in brushless dc motor systems
針對無刷直流電動機系統的非線性數學模型特點，提出了一種簡單的摩擦補償方法.該方法首先利用輸入輸出線性化方法將原系統模型轉化為一種簡單的線性模型，然後給出一種非線性摩擦估計器實時估計系統中的庫侖摩擦值，最後利用摩擦前饋補償方法對其進行補償.模擬結果表明該方法可以有效地抑制無刷直流電動機系統中的摩擦影響 -
The motion model of saw motor is set up by the formulae of hertz ' s theory and coulomb ' s friction law
以計算球體?平面擠壓形變的赫茲公式和計算摩擦力的庫侖定律為基礎，建立了表面彈性波馬達的運動模型。 -
When impact applies on a discrete system in which one of constraints is a constant with coulomb friction, the phenomenon of slip - stick at the point can cause the change of friction and the integration for frictional force during infinitesimal impulsive interval becomes impossible according to traditional impulsive dynamics of discrete systems. by introducing a new dimensional time parameter, first - order momentum - impulse differential equations are obtained and the discussion over infinitesimal impulsive interval is transformed into a piece - wise study on the finite region of impulse
在引入新的無量綱的時間參數后，通過建立相應的動量-沖量的一階微分方程，在趨近於零的沖擊區間的討論變為在有限區間中來分段研究含滑動-黏滯的沖擊過程，得到了受到多點打擊的離散系統考慮庫侖摩擦時的動力學的求解方法，即根據沖擊前的初始狀態無需回到繁瑣的微分方程的求解便可以得到沖擊后系統的動力學響應。 -
Coulomb law of friction
庫侖摩擦定律 -
Basing on the coulomb friction model, a model reference adaptive control system is designed first according to lyarpnov stable theory. considering the real situation at low speed region, the stribeck model controller is put into use also. the both regulators are studied through simulation
針對非線性摩擦對系統低速性能的影響，根據自適應控制理論，採用李雅普諾夫穩定理論，首先設計了基於庫侖摩擦的模型參考模型自適應控制系統，考慮到轉臺伺服系統低速時工作在stribeck區的真實情況，理論上綜合出利用非線性stribeck摩擦模型的自適應控制器，並進行了模擬研究。 -
Planar joint clearance ; spatial joint clearance ; contact model ; hertz theory ; coulomb s friction
平面間隙空間間隙碰撞模型赫茲接觸庫侖摩擦 -
By considering the contact between the teeth and utilizing the face to face contact model with contact element and coulomb friction model, the author have developed a computing method for plastic load of tooth - locked quick actuating pressure vessel based on finite element stress analysis and stress categorization
摘要通過接觸單元來數值模擬嚙合齒的接觸過程，建立了基於整體有限元分析的齒嚙式快開壓力容器塑性載荷計算方法。 -
Coulomb friction model with high accuracy is proposed so that more accurate equations of motion can be established for the transient response of the single - disk rotor which drops onto the back - up bearing as soon as amb shuts down
摘要就磁軸承發生故障時轉子墜入備用軸承所?生的非線性瞬態響應，提出了摩擦力的計算模型，從理論上建立了更為精確的運動微分方程。 -
A coulomb friction model with high accuracy is proposed so that more accurate equations of motion can be established for the transient response of the single - disk rotor which drops onto the back - up bearing as soon as amb shuts down
摘要就磁軸承發生故障時轉子墜入備用軸承所?生的非線性瞬態響應，提出了摩擦力的計算模型，從理論上建立了更為精確的運動微分方程。 -
The main research results are as follows : the friction contact between teeth in the tooth - locked quick closure device is studied, and the simulation is made to the contact conduct between the teeth utilizing the face to face contact model with contact element and coulomb friction model, the whole finite element model of tooth - locked quick closure device is created
本文主要有以下成果： （ 1 ）對齒嚙式快開裝置中嚙合齒間存在的摩擦接觸現象進行了研究，利用接觸單元法採用面-面接觸模型和庫侖摩擦模型對齒間的接觸行為進行數值模擬，建立了齒嚙式快開裝置的整體有限元模型。
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