Abstract
SYNOPSIS Initially the vehicle response during braking is investigated with the aid of a mathematical model having a realistic road input. Using an integrated hybrid computer, the road-tyre characteristics are simulated by generating non-linear functions on the digital computer, while the mathematical model is described on the analogue computer with parallel logic facility. An adaptive braking control system is proposed which measures and processes the rear-wheel motion. Activation of the system occurs when the wheel deceleration and a quasi wheel slip reach given reference values. The adaptive system as developed and optimised on the hybrid computer is implemented on the rear wheels of the test vehicle. The predicted values of wheel speed, brake-pressure modulation, stopping distance and vehicle yaw are shown to compare favourably with the test results.
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