ABSTRACT
Two of the earlier UAVs were the Gamma and Lambda unmanned research vehicles (URVs) used by the U.S. Air Force (USAF) Wright Laboratory [2]. The Lambda URV shown in Figure 2.1 is a remotely piloted aircraft (RPA) with a wingspan of 4 ft and was operated by the USAF for research in flight control technology. The objectives of the project are described as follows:
1. To design robust flight control systems using the quantitative feedback theory (QFT) design technique
2. To flight test these designs 3. To implement an inner loop flight control system on the Lambda URV that would be part
of an autonomous flight control system 4. To illustrate some of the real-world problems that are encountered in performing the con-
trol system design process as shown in Figure 2.2
Many other URVs were developed in the evolution of the UAVs of the twenty-first century.
