Multicondition Terminal Control Systems for Aircraft

A method is presented for synthesizing a type of control system applicable to automatic landing of aircraft and designated as a multicondition terminal control system. This closed-loop control system is designed to cause the response of a controlled member to meet several independently specified conditions at a particular instant of time. The desired values of altitude and altitude rate at touchdown typify such conditions. Because the S3^stem operates to shape the response at one time only, it is suitable for use with controlled members that have oscillatory or divergent responses to forcing inputs.