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Shock pulse method (SPM) is a technique for using signals from rotating rolling bearings as the basis for efficient condition monitoring of machines. From the innovation of the method in 1969 it has been further developed and broadened and is a worldwide accepted philosophy for condition monitoring of rolling bearings and machine maintenance.
Shock and vibration logger with integrated 3-axis digital accelerometer and lithium-polymer battery. A shock data logger or vibration data logger is a measurement instrument that is capable of autonomously recording shocks or vibrations over a defined period of time.
Active vibration control is the active application of force in an equal and opposite fashion to the forces imposed by external vibration. With this application, a precision industrial process can be maintained on a platform essentially vibration-free. Many precision industrial processes cannot take place if the machinery is being affected by ...
ISO 21940 [6] classifies vibration in terms of G codes. Unfortunately, it is the theoretical value assuming the rotor was spinning in free space so it does not relate to actual operating conditions. Rotors of the same type having permissible residual specific unbalance value e per, varies inversely with the speed of the rotor. e per × ω ...
The vibrator must be securely clamped, typically with machinist-grade clamps or high-tensile bolts. Positioning and orienting vibration sensor. The best location for this sensor is on one of the corners of the workpiece, and in-line with the force-plane of the vibrator (a plane perpendicular to the vibrator’s axis of rotation [AOR]).
Vibration mode of a clamped square plate. The vibration of plates is a special case of the more general problem of mechanical vibrations.The equations governing the motion of plates are simpler than those for general three-dimensional objects because one of the dimensions of a plate is much smaller than the other two.
Vibration isolation is the prevention of transmission of vibration from one component of a system to others parts of the same system, as in buildings or mechanical systems. [1] Vibration is undesirable in many domains, primarily engineered systems and habitable spaces, and methods have been developed to prevent the transfer of vibration to such ...
A simpler system, known as re-active monitoring, may be used by, for example, monitoring rates of usage of consumable items. Such a system was introduced by Carl West at a fabrication workshop in Rotherham, England. In this system, the vibration levels of the angle grinding tools in use was measured, as was the average life of a grinding disk.
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