An agricultural vehicle, comprising: a chassis; and a header system carried by said chassis, said header system including: a frame; a cutter carried by said frame; a cutter sensor associated with said cutter and configured to output a cutter height signal; a gauge wheel carried by said frame behind said cutter; a wheel sensor associated with said gauge wheel and configured to output a wheel position signal; an actuator system including a plurality of actuators (34A, 34B, 34C) carried by said chassis; and a controller electrically coupled to said cutter sensor, said wheel sensor and said actuator system, said controller configured to: receive said cutter height signal; and receive said wheel position signal; characterized in that: the actuator system is configured to adjust a height and a tilt angle (αT) of said frame; said controller is further configured to compare said cutter height signal and said wheel position signal to determine a difference in magnitudes of said cutter height signal and said wheel position signal to indicate a terrain irregularity is present and activate at least one actuator (34A, 34B, 34C) of said actuator system to adjust at least one of the height and the tilt angle (αT) of said frame in response to determining said terrain irregularity is present. a chassis; and a header system carried by said chassis, said header system including: a frame; a cutter carried by said frame; a cutter sensor associated with said cutter and configured to output a cutter height signal; a gauge wheel carried by said frame behind said cutter; a wheel sensor associated with said gauge wheel and configured to output a wheel position signal; an actuator system including a plurality of actuators (34A, 34B, 34C) carried by said chassis; and a controller electrically coupled to said cutter sensor, said wheel sensor and said actuator system, said controller configured to: receive said cutter height signal; and receive said wheel position signal; a frame; a cutter carried by said frame; a cutter sensor associated with said cutter and configured to output a cutter height signal; a gauge wheel carried by said frame behind said cutter; a wheel sensor associated with said gauge wheel and configured to output a wheel position signal; an actuator system including a plurality of actuators (34A, 34B, 34C) carried by said chassis; and a controller electrically coupled to said cutter sensor, said wheel sensor and said actuator system, said controller configured to: receive said cutter height signal; and receive said wheel position signal; receive said cutter height signal; and receive said wheel position signal; characterized in that: the actuator system is configured to adjust a height and a tilt angle (αT) of said frame; said controller is further configured to compare said cutter height signal and said wheel position signal to determine a difference in magnitudes of said cutter height signal and said wheel position signal to indicate a terrain irregularity is present and activate at least one actuator (34A, 34B, 34C) of said actuator system to adjust at least one of the height and the tilt angle (αT) of said frame in response to determining said terrain irregularity is present. the actuator system is configured to adjust a height and a tilt angle (αT) of said frame; said controller is further configured to compare said cutter height signal and said wheel position signal to determine a difference in magnitudes of said cutter height signal and said wheel position signal to indicate a terrain irregularity is present and activate at least one actuator (34A, 34B, 34C) of said actuator system to adjust at least one of the height and the tilt angle (αT) of said frame in response to determining said terrain irregularity is present.