A cam is used to impart a desired motion to a follower by direct contact. Which of the follower motion will produce the least jerk to the system?

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ISRO VSSC Technical Assistant Mechanical 14 July 2021 Official Paper
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  1. Simple harmonic
  2. Constant acceleration
  3. Cycloidal
  4. Constant velocity

Answer (Detailed Solution Below)

Option 3 : Cycloidal
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Detailed Solution

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Explanation:

In any Cam-Follower design, the jerk must be finite across the entire interval.

Cycloidal Motion:

In cycloidal motion, there are no abrupt changes in the velocity and acceleration at any stage of the motion.

Thus in this type, jerks are the least and this is the most ideal motion for high-speed follower motion.

For better understanding, analyse the displacement, velocity, and acceleration diagram given below.

TOM 14

Additional Information

Uniform velocity motion:

324

Uniform Acceleration and Retardation:

TOM 12

Simple harmonic motion:

325

Cycloidal motion:

326

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