Authors G.E. Veselov, A.S. Sinitsyn
Month, Year 07, 2015 @en
Index UDC 681.51
Abstract Modern transport industry is steadily strive to improve the safety and comfort of produced vehicles. One of the most promising developments in this area is the introduction of shock absorbers with variable characteristics. The system of shock absorbers with controllable properties is called "adaptive suspension system". Performance requirements for vehicle active suspensions include: a) ride comfort, which means to isolate the body as far as possible from road-induced shocks and vibrations to provide comfort for passengers, b) road holding, which requires to suppress the hop of the wheels for the uninterrupted contact between wheels and road; and c) suspension movement limitation, which is restricted by the mechanical structure. Presented requirements often conflict with each other, forcing the developers to look for some compromise. At the moment, there are many approaches to solving this kind of problem. One of these approaches is the method of Lyapunov functions, but it has a significant disadvantage – the restriction on the initial conditions in the system. As an alternative in this paper proposes a adaptive system of active suspension control based on synergetic control theory. Application of a method analytical construction aggregated regulators (ACAR) has allowed synthesizing the multiobjective control law which maximally takes into account nonlinear specifics of control object, and provides performance the first two operational requirements for the adaptive suspension. The research results show that the obtained regulator copes with its task, even in conditions of parametric uncertainties. Numerical modeling and comparative analysis of the closed-loop system with different implementations of the control law was carried out to demonstrate the effectiveness of the proposed solution.

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Keywords Active suspension; nonlinear controller; adaptation; synergetics approach; multiobjective control law.
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