MOTORISED GYROSCOPE

MOTORISED GYROSCOPE

INTRODUCTION

A) AXIS OF SPIN

• If a body is revolving about an axis the latter is known as axis of spin. 

B) PRECESSION

• Precession means the rotation about the third axis ). which is perpendicular to both the axis of spin "ox' and that of couple

C) AXIS OF PRECESSION

• The third axis OZ is perpendicular to both the axis of spin 'OX' and that of couple 'OY' is known as axis of precession.

D) GYROSCOPE

• It is a body, which, while spinning about an axis, is free to rotate in
• either directions under the action of external forces.
• Examples : Locomotive, automobile and aero-plane making a turn. In
• certain cases the gyroscopic forces are undesirable whereas in other
• cases the gyroscopic effect may be utilized in developing desirable
• forces.

E) GYROSCOPIC EFFECT

• To a body, revolving (or spinning) about an axis say 'OX
• a couple represented by a vector OY perpendicular to 'OX' is applied,
• the body tries to precess about an axis 'OZ' which is perpendicular
• both to 'OX' and 'OY'. Thus the plane of spin, plane of precession and
• plane of gyroscopic couple are mutually perpendicular.
• The above combined effect is known as precession or ģyroscopic
• effect.

DESCRIPTION AND WORKING INSTRUCTIONS

• . The
• motor is coupled to the disc rotor, which is balanced. The disc shaft
• rotates about 'X-X' axis in two-ball bearing housed in the frame No.1. This
• frame can swing about 'Y-Y' axis in bearings provided in the yoke type
• frame No.2. While in a steady position, Frame No.1 is balanced. The yoke
• frame is free to rotate about vertical axis 'Z-Z'. Thus freedom of rotation
• about three perpendicular axis is given to the rotor.

shown in fig.(GYROSCOPIC)

PRECAUTIONS

1. While measuring the speed with tachometer do not exert pressure on

rotor shaft. Use of Non-contact type tachometer or stroboscope for measurement of motor speed will give better results.

2. When the speed of rotor spin is changed, it takes some time to attain

the constant speed due to rotor inertia. Hence, it is advised to wait until the rotor spin reaches constant speed.

*****************