Inderscience Publishers

PID control for active hydropneumatic suspension based on the feedback linearisation

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Courtesy of Inderscience Publishers

Based on modelling and experimental validation of the hydropneumatic spring, a non-linear dynamic model is developed for the active hydropneumatic suspensions of missile launching vehicle. In order to fulfil the special requirements of mobile launching, the non-linear system is transformed into a linear one by means of feedback linearisation (FBL) according to the theory of differential geometry. Furthermore, a PID control approach is applied for the solution to the system of equations. It is indicated by the simulation results that the present non-linear controller combining the FBL with linear control algorithm is characterised with its fairly simple structure and good performance.

Keywords: active suspension, hydropneumatic suspension, differential geometry, feedback linearisation, hydropneumatic springs, PID control, vehicle suspensions, vehicle vibration, missile launching, launch vehicles, nonlinear controllers, linear control, modelling

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