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A torque/force control requires a torque/force sensor or a current sensor(for DC servo motor) for feedback loop however they occupy large volume and weight or have low precision and time delay Therefore the robot system sometimes has a local position control in the motor drivers from the safety point of view
2020-8-18Bearing applications running outside the green zone must be treated as exceptions as grease-failure mechanisms are abnormal (more complex with a large spread) and more difficult to predict Also for the speed parameter A = n x d m where n is the rotational speed in r/min and d m is the bearing mean diameter in mm existing grease-life data
2020-8-19In order to determine the transient stability of a power system using swing equation let us consider a synchronous generator supplied with input shaft power P S producing mechanical torque equal to T S as shown in the figure below This makes the machine rotate at a speed of ω rad/sec and the output electromagnetic torque and power generated on the receiving end are expressed as T E
2019-8-22improved in our agency to apply to liquid-lubricated bearings The modelling and formulation are based on mainly Gupta's work of bearing dynamics problems [3] The motion of each ball or retainer can be treated with six degrees-of-freedom Collisions between the bearing elements (balls races and retainer) are modelled with a
2017-9-77 Starting and running torques 7 1 Preload and starting torque for angular contact ball bearings Angular contact ball bearings like tapered roller bearings are most often used in pairs rather than alone or in other multiple bearing sets Back-to-back and face-to-face bearing sets can be preloaded to adjust bearing rigidity
2018-1-10This paper presents an improved computational model for the angular contact ball bearing (ACBB) running torque Considering the general loading condition the friction torque formula of individual bearing balls was derived Five friction components were considered: elastohydrodynamic lubrication (EHL) rolling resistance elastic hysteresis friction differential sliding loss spinning friction
2019-12-10In response to the fact that not all rolling balls are laden when the angular contact ball bearing working under the condition with certain combined loads especially when the axial preload is not large enough an analytical method for the determination of the time-varying stiffness of angular contact ball bearing considering the effect of time-varying number of laden balls and load
2010-2-22 2 2 3 Torque – slip characteristics of the single phase induction machine 14 2 2 2 4 Modeling of the single phase induction machine 17 2 2 2 5 Voltage and torque equations in machine variables 19 2 2 2 6 Voltage and torque equations in the arbitrary reference frame 22 2 2 2 7 Torque produced by the capacitor-run single phase induction
ANGULAR MOMENTUM / 331 10-1 The Vector Nature of Rotation 332 10-2 Torque and Angular Momentum 334 10-3 Conservation of Angular Momentum 341 *10-4 Quantization of Angular Momentum 350 Physics Spotlight: As the World Turns: Atmospheric Angular Momentum / 353 Summary 354 Problems 355 Chapter R SPECIAL RELATIVITY / R-1 R-1 The Principle of
2015-9-142 Hardware of the running gear on the roller rig The actual running gear operating on the roller rig is a scaled 1 : 5 version of the single axle running gear con-ceived for the intermediate wagons of the NGT The ma-jor components of the Experimental Running Gear are the central frame the two axle bridges and the four wheels
US10406002B2 US14/150 840 US201414150840A US10406002B2 US 10406002 B2 US10406002 B2 US 10406002B2 US 201414150840 A US201414150840 A US 201414150840A US 10406002 B2 US10406002 B2 US 10406002B2 Authority US United States Prior art keywords torque member motor γ configured Prior art date 2010-04-05 Legal status (The legal status is an assumption and is not a legal
1995-7-11A drilling torque and drag monitoring method for a drillstring in a well bore including the steps of measuring hook load and axial displacement of the drillstring measuring surface torque and angular position of the drillstring correlating the hook load with the axial displacement of the drillstring so as to produce a first graphical relationship correlating the surface torque and the
2017-6-14from torque tube canceled out the geometrical torque and left behind the mean frictional torque 5 Repeatability Tests Before experimentation the repeatability of the results was ensured The plot shown in figure 6 below shows the repeatability results by running the setup three times at 25 o C The maximum variation amongst the test was
2015-8-11The torque generated by the stator is dependent on the applied load ζ L as a natural consequence of steric forces A general discussion on contact forces and the explicit formulation of the repulsive interaction potential V R S are provided in Overview of Steric Forces and Rotor–stator interaction potential respectively
2020-2-1running at 300 Hz with improved dynamic models of the soft robot High performance control of soft robot joints such as the joint presented in this paper will enable a wide range of robot applications that were previously difﬁcult or impossible due to the rigid nature of traditional robot linkages and actuation schemes I INTRODUCTION
Angular Contact Ball Bearings Articles About Angular Contact Ball Bearings Articles are sorted by RELEVANCE Sort by Date 1 Radial Play (Internal Clearance in Ball Bearings) (August 2011) At first glance ball bearings are relatively simple mechanisms However an analysis of their internal geometries reveals that they are quite complex
2012-11-9with piston running perpendicular Figure 1 - The top compression ring oil ring with piston running perpendicular Due to piston to cylinder clearance and thermodynamic changes occurring in the piston during operation the piston can tilt therefore at the ring top edge of the contact face is subject to large stresses Companies are
2015-8-11The torque generated by the stator is dependent on the applied load ζ L as a natural consequence of steric forces A general discussion on contact forces and the explicit formulation of the repulsive interaction potential V R S are provided in Overview of Steric Forces and Rotor–stator interaction potential respectively
2011-12-14the contact area (tread blocks) and additional in plane shear also occurs due to change in belt tension at contact patch These shear stresses applied to the individual tread blocks cause coupled reaction forces resulting in an aligning torque Thus radial tyres generate measurable lateral force
Description of rigid body motion Figure 1 shows the schematic diagram of a rigid body in 3D space under contact forces and the gravitational force S and B denote the spatial and the body coordinate frame respectively The total mass and the inertia tensor of the object evaluated at the center of mass are denoted by m and (mathcal {I}) respectively where (mathcal {I}) is a diagonal
Computer simulation can be used to predict human walking motions as a tool of basic science device design and for surgical planning One the challenges of predicting human walking is accurately synthesizing both the movements and ground forces of the stance foot Though the foot is commonly modeled as a viscoelastic element rigid foot-ground contact models offer some advantages: fitting is
2010-10-19Muscles actuate running by developing forces that propel the body forward while supporting the body's weight To understand how muscles contribute to propulsion (i e forward acceleration of the mass center) and support (i e upward acceleration of the mass center) during running we developed a three-dimensional muscle-actuated simulation of the running gait cycle
2012-11-9with piston running perpendicular Figure 1 - The top compression ring oil ring with piston running perpendicular Due to piston to cylinder clearance and thermodynamic changes occurring in the piston during operation the piston can tilt therefore at the ring top edge of the contact face is subject to large stresses Companies are
2020-8-19In order to determine the transient stability of a power system using swing equation let us consider a synchronous generator supplied with input shaft power P S producing mechanical torque equal to T S as shown in the figure below This makes the machine rotate at a speed of ω rad/sec and the output electromagnetic torque and power generated on the receiving end are expressed as T E
Computer simulation can be used to predict human walking motions as a tool of basic science device design and for surgical planning One the challenges of predicting human walking is accurately synthesizing both the movements and ground forces of the stance foot Though the foot is commonly modeled as a viscoelastic element rigid foot-ground contact models offer some advantages: fitting is
2020-1-22The axial Ω and relative angular momenta M Ω and M r depend on the meridional mass distribution and relative zonal velocity respectively According to the conventional formulation the time rate of change of M Ω is determined by the Coriolis conversion induced by meridional velocity whereas M r is accelerated by and the friction and pressure torques
1995-7-11A drilling torque and drag monitoring method for a drillstring in a well bore including the steps of measuring hook load and axial displacement of the drillstring measuring surface torque and angular position of the drillstring correlating the hook load with the axial displacement of the drillstring so as to produce a first graphical relationship correlating the surface torque and the
2013-9-19The subsystem for calculation of the torque acting on the rotor/shaft in the direction of the x-and y-axes is shown in Figs 12 and 13 The constant fi1 presents the angle of the balancing mass placement that is chosen by the user (it is the same angle like at static balancing) Figures 14 and 15 show subsystems for calculation of torque
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