Governor Arrangement This is the most common type of governor. In the centrifugal type governors, rotation of the crank shaft is taken to a vertical spindle through suitable gears. It consists of two balls of equal mass, which...
Function of Governor The function of a governor is to automatically maintain the speed of an engine within specified limits whenever there is a variation of load. If the load on the engine increases, its speed decreases. So it...
In this section we introduce the concept of a view in SQL. We show how views are specified, and then we discuss the problem of updating views (Virtual Tables) and how views can be implemented by the DBMS. Concept of a View in...
So far, we have discussed the free vibrations of systems where a system once disturbed from its equilibrium position executes vibration indefinitely because of its elastic properties. In actual practice, this system will come to...
Consider a uniform shaft of negligible mass rigidly fixed at its upper end and carrying a disc at its lower end, as shown in Fig. If the disc is given a twist about its vertical axis and then released, it will start twisting and...
Critical or whirling or whipping speed is the speed at which the shaft tends to vibrate violently in the transverse direction. In other words, the speed at which resonance occurs are known as the critical speed. At critical...
In this section, we introduce two additional features of SQL: the CREATE ASSERTION statement and the CREATE TRIGGER statement. Before discusses CREATE ASSERTION, which can be used to specify additional types of constraints that...
Types of vibration may be classified according to : the actuating force on the body, and the stresses in the supporting medium, as shown in image. According to the Actuating Force Free or Natural Vibrations If the periodic...
Since most of the vibrating system follow harmonic motion (SHM), therefore it is essential to have proper understanding of SHM related basic concepts. A body is said to have simple harmonic motion (SHM), if it moves or vibrates...
SQL has a number of additional features that we have not described in this chapter but that we discuss elsewhere in the book. These are as follows: we will present the following additional SQL features: various techniques for...
