BALANCING

I think this will help you all to understand balancing….

1. Balancing.PDF
2. DynamicBalancingExp.PDF
3. balancing masses
4. DynamicBalancing.pdf
5. Balancing.pdf

Remote controlled material handling equipment (RCMHE)

Prior to the introduction of the so called “Material handling equipment” humans had to perform physical labor to carry out heavy duty tasks. This could be made possible by employing a huge number of workers. However, when the goods came in bulk unloading and loading turned out to be a very time consuming affair. The use of Material handling equipment in logistics has played a significant role in making the loading and unloading activities easier and faster.

Ask yourself the question “Why are ‘Remote controlled’ material handling equipment used?” and almost instantly you arrive at the logical answer that the chief benefit would be allowing personal to control their machine from a safe distance.

Remote control can be achieved by two different modes:

1)     Radio frequency (RF) Signals

RF signals are further divided into two categories.

a)     Narrow-band system  b)  Spread spectrum system.

2)     Infrared light

Infrared method works by transmitting a beam of light

Infrared mode of radio control is preferred over RF signals because of the safety and precision that it offers. Since the infrared method works by transmitting a beam of light, once the beam is out of sight, the beam is obstructed and the controls turn off.  That is, the operator must always be in view of the RCMHE, which in turns aids safety as the full visibility of the operator over the machine is critical. Precise, in the sense that with the use of RF technology there is always a chance of interference with other signals and might lead to accidents, Infrared remote control makes this type of mistake impossible.

Applications:

1)      Transfer of components from one container to another especially fragile objects

2)      Transfer of  hazardous/explosive objects

3)      Operation in high temperature environment

 

Although it is advantages to use RCMHE, proper training for the staff handling the RCMHE is a prerequisite to ensure safe working.

Remote controlled aircraft

This mechanical engineering project is about the construction of a flying model of an air craft controlled by a remote control. The materials for construction include light weight materials like wood, plastic and foam.

The tasks included in this working project are:
1. Building the body of the RC plane.
2. Building the RC plane controls.
3. Building the Electronic controls.

The four primary controls of an RC plane, collectively called control surfaces, are:

1. Throttle
2. Elevator
3. Ailerons
4. Rudder

The flight of the plane is directed by the movements of these control surfaces. The control surfaces are controlled by small servo motors which are in turn controlled using the remote control.

Even when the plane is made it is not easy to control it without crashing your model several times. So it is better to take a flight video each time you try to fly it, so that if the model is destroyed beyond repair, you may be able to present the video during your project evaluation.

Useful references:

http://www.rc-airplane-advisor.com/
http://www.rc-airplane-world.com/rc-airplane-controls.html

 

Wall Climbing Robot (WCR)

You would rather hesitate to do the inspection and maintenance in a typically dangerous environment like the exterior of a tall building or a nuclear facility and pray to God to provide for someone else to do the same. Well, consider your prayers answered! A wall climbing Robot is willing to go through the trouble so that you can still keep smiling!

But, the idea of developing a wall climbing robot is always held back by the mighty force of GRAVITY!

And BEWARE. This won’t be an Easy Project for you. But this definitely is a fantastic Mechanical Engineering Seminar Topic, especially if you can demonstrate how it defies gravity.

You need to move against gravity to accomplish the task. Adhesion is what is required primarily, to help keep the robot firmly on to the wall. Reliable adhesion is a major factor in developing a WCR. Once a proper suction is obtained, locomotion is the next step.  It is also equally important to keep the weight as low as possible so that the effort to stick on to the wall is quite low.

Adhesion is achieved by making use of

1. Suction cups

Suction cups offer excellent grip (almost upto 1 atm). But, the negative aspect of using a suction cup is that it needs a vacuum pump. Since the vacuum pump is bulky and has high power consumption it is rather difficult to accommodate one in a WCR. Moreover, a suction cup would find itself useless when trying to stick to a rough surface.

2.    Electrostatic  chuck (ESC)

ESC achieves controlled adhesion by means of electrostatic forces.

Mobility is achieved by making use of an electric motor.

With these things in mind, I hope you would have got an insight of the Wall Climbing Robot.

 

Ref: http://spectrum.ieee.org/robotics/robotics-software/wallclimbing-robot-spies