COMPUTER RECOMMENDATIONS FOR AN AUTOMATIC APPROACH AND LANDING SYSTEM FOR V/STOL AIRCRAFT VOLUMEⅠ: COMPUTER RECOMMENDATIONS

摘要

Three airborne digital computers, among 20 possible candidates, are the most suitable for an automatic approach and landing system. They are:n• Honeywell ALERTn• IBM 4 Pi/CP-2n• Raytheon RAC-230nOf these three computers, the RAC-230 has an advantage in speed of calculation, but the ALERT and CP-2 have an advantage in having been used in other airborne applications.nHowever, even for these computers, computational speed is inadequate. This condition can be alleviated by (1) constructing a relatively simple preprocessor to do the least-squares fit on gyro data and to do the accelerometer compensation, and (2) simplifying the navigation algorithms to be investigated in the flight test program. Obviously, two of the recommended computers operating in parallel would solve the speed problem, but other desirable characteristics would be adversely affected.