Wheeled vehicle deceleration as estimation parameter of adaptive brake control system state

The method of stability estimation of adaptive control system with signal adjustment based on Lyapunov’s direct method that allows to take into account the nonstationarity of the basic system and non-linearity in the form of limitation on control action restriction as well as error control is stated

STABILITY EVALUATION OF WHEELED VEHICLES ADAPTABLE BRAKING CONTROL SYSTEM

The method of stability evaluation of adaptable control system signal tuning stability on the basis of the second Lyapunov’s approach that allows to take into account the nonstationarity of the basic system and nonlinearity in the form of restriction on control action is stated in the given article

ANALYSIS OF PERTURBED MOTION STABILITY OF WHEELER VEHICLES BRAKES CONTROL SYSTEM

The analysis of the perturbed motion stability of the brake automatic control system on the basis of Lyapunov’s second method is carried out. Using transformations of Lurie there has been ob-tained the canonical form of the system of equations of automatic control. It allowed determining the necessary and sufficient conditions of the asymptotic stability of the system irrespective of its initial condition and a definite choice of the admissible characteristic of the regulator

THE RESEARCH OF BRAKING–STOP–START MODES OF CAR MOTION ON THE SLOPE

Problem. The problem is the synthesis of a driver support automatic systems at the start and forming the basis for further research of dynamic processes for the transient motion modes. Goal. The goal is to study dynamic processes in braking-stop-start modes of a car moving aslope by simulation of dynamic behavior of the car and its steering control systems. Methodology. Structural simulation model of the braking-stop-start process of car motion has been realized in the Simulink application of the Matlab software and is presented by functional blocks simu-lating the process of dynamic state of the car and the working processes of transmission and brakes con-trol systems, the mathematical description of brak-ing-stop-start modes of car motion aslope has been made. Results. The suggested simulation model makes possible evaluation of parameters characterizing the dynamic behavior of the car with the given laws of fuel intake control, brake torque and torsion torque linked up with the driving wheels in different driving modes; simulation modes reflect the car deceleration by braking system up to its full stop on the slope, keeping the car motionless by the braking system and its start at connection by friction clutch of the engine and the transmission, the structural scheme of the model of the process of the car motion aslope has been performed. Scientific novelty. The prerequisites for formation of the basis for further research of the modes of the car dynamic state when starting the motion aslope have been substantiated, the methods of research of the car dynamic behavior when starting moving aslope have been built, it has also been determined that when the level of the fuel supply is enough for the car motion ahead, the law of the fuel intake change and the law of the clutch control have a small impact on the value of its rolling. Practical value. The results of the research can be used to extend the courses of students training in automobile specialties; the results of the simulation of the dynamic behavior of the car, as the functions of control system working processes, allow carrying on the research work on improving the automatic system of brake control when starting motion aslope

ESTIMATION OF DRIVER’S POWER EXPENSES OF CAR BRAKE MANAGEMENT

The estimation method of driver’s power expenses for the brake management is offered. The estimation method takes into account power expenses at driving in action of the brake system and power expenses at holding the pressed brake peda