An important problem for television systems is the jumping or wobbling of the picture

Chapter 0, Problem P5.1

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An important problem for television systems is the jumping or wobbling of the picture due to the movement of the camera. This effect occurs when the camera is mounted in a moving truck or airplane. The Dynalens system has been designed to reduce the effect of rapid scanning motion; see Figure P5.1. A maximum scanning motion of 25/s is expected. Let Kg ~ K, = I and assume that Tg is negligible, (a) Determine the error of the system E(s). (b) Determine the necessary loop gain KaKnK, when a l/s steady-state error is allowable, (c) The motor time constant is 0.40 s. Determine the necessary loop gain so that the settling time (to within 2% of the final value of v!:) is less than or equal to 0.03 s