Real-Time Microprocessor Technology Applied to Automatic Braking Systems

Since the advent of the jet engine, aircraft stopping capability has been dependent primarily on brakes and tires. To provide high performance control after landing while conserving tires and brakes, efficient hydraulic pressure systems have been developed. Associated electronic controls have historically relied on analog technology; but with the availability of high speed microprocessors, real-time digital control is now possible for automatic braking functions. This paper reviews the role of digital technology and the microprocessor in the braking control loops.