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Vipin R.
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LaTeX
TutorMe
Question:

How to add pictures in latex?

Vipin R.
Answer:

You need to use a graphics library. Put this in your preamble: "\usepackage{graphicx}" You can then add images like this: "\begin{figure}[h] \centering \includegraphics[width=90mm]{name_of_picture.jpg} \caption{A simple caption \label{overflow}} \end{figure}" This is the basic template I use in my documents. The position and size should be tweaked for your needs.

Mechanical Engineering
TutorMe
Question:

Write a note on thermal analysis of a solid disc brake?

Vipin R.
Answer:

Braking is a process which converts kinetic energy into mechanical energy which must be dissipated in the form of heat. During the braking phase, the heat generated in the interface between the disc and the pad can lead to high temperatures. The temperature variations depend on various factors including the tangential velocity component of the disc when the car is in motion.Disc brakes have been widely used in light vehicles. In this break system, two friction pads are pressed axially against a rotating disc to dissipate kinetic energy. The working principle is very similar to that of a friction clutch. A pair of breaking pads are squeezed against the disc to generate friction, which retards the motion of the vehicle. It converts energy due to motion into heat, and if the brakes get too hot, they become less effective, a phenomenon known as brake fade. The brake disc is usually made of cast iron, but in some cases composites such as reinforced carbon - carbon or ceramic matrix composites are also used. The heat energy generated in the disc is conducted radially out through the solid disc and is later convected out to the surroundings from the disc surface.The disc is assumed to be in rotation when the break force is applied. The disc can be thought of as two annular concentric discs, the inner one having a radius from r1 to r2 where the break pad is assumed to make contact (where convection effect is ignored as it is expected to be enclosed within the body of the car), and the outer disc having radius ranging from r2 to r3. Only the conduction in the radial direction is considered for the ease of application of the above equation (in the theoretical sense, significant conduction is there in the axial direction also).further ANSYS analysis can be done to visually have a fell of the temperature variation.

Aerospace Engineering
TutorMe
Question:

What are the constraints and issues during departure in a close range rendezvous mission?

Vipin R.
Answer:

All rendezvous missions, except for assembly missions, will eventually include the separation and departure from the target spacecraft. This phase includes the re-initiation of the GNC system, the opening of the utility and structural connections and the departure from the target station. The end conditions of this phase are that the departing vehicle moves on a non-returning trajectory, and has arrived at a sufficiently safe distance w.r.t. the station, when the large thrust maneuver for de-orbitation will be performed.After the opening of the structural latches, an impulse has to be applied to the centre of mass (CoM) of the departing vehicle (assuming the target station remains passive) to achieve the necessary departure velocity. This is generally the task of the propulsion system of the departing vehicle. However, an impulse large enough to achieve the required safe departure trajectory implies a relatively lar e thrust in very close proximity to the target vehicle surface.Solutions to this problem may include, as first maneuver steps, the application of spring forces at release of the structural latches, providing the impulse for the first few metres of motion, and thereafter the application of thrusts in a direction orthogonal to the docking port direction. Another constraint is the requirement for observability of the departure trajectory by a sensor or video camera, in the same way as for the final approach. This leads to the definition of a departure corridor analogous to the docking corridor.

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