Gain Scheduling
The shaping or programming of certain gains to compensate for varying conditions, such as airspeed, beam convergence, etc.
As an example in the autopilot when you capture the glideslope and move closer to the centre of the beam gain scheduling is automatically provided by radio altitude input to compensate for glideslope radio beam convergence. i.e. When the aircraft is further away from the beam centre it needs a larger signal to reposition towards the centre of the beam. However when close to the beam centre smaller responses are needed and this is acheived by reducing the gain of the signal or to dampen the effect of the signal variation.
An analogy would be taking a shower when you first turn it on you will need to adjust the temperature control with large movements to get the approximate temperature(otherwise you will be burnt or very cold
). Then only small adjustments are needed to obtain the required temperature. Your body senses the change and your hand movement provides the automatic gain programming