An Improved Type-2 Fuzzy Logic Approach Based Sliding Mode Controller for Vehicle Active Suspension System

作者：Kalaivani R^*; Lakshmi P; Rajeswari K

来源：Journal of Vibration Engineering & Technologies, 2015, 3(4): 431-446.

• Quarter car
• Passive system
• VASS
• Vibration control
• T1FLC
• T2FLC
• SMC
• IT2FSMC
• Simulation

This paper proposes an Improved Type-2 Fuzzy Sliding Mode Control (IT2FSMC) algorithm for Vehicle Active Suspension System (VASS). Initially, the vibration control technology based on an intelligent method called Type-1 Fuzzy Logic Control (T1FLC) is established to ensure ride comfort of a road vehicle. In a vehicle, the active suspension plays an important role in isolating the passengers and the vehicle body from the road roughness. Fuzzy Logic is an efficient way that implements engineering heuristics into a control action. Secondly, Type-2 Fuzzy Logic Control (T2FLC) which is proved to be more efficient than the T1FLC and that can handle uncertainties to a greater extent is used for control purpose in a VASS. Finally IT2FSMC is used. The novelty of Lyapunov's stability theory based Sliding Mode Control (SMC) which guarantees robust control is, that it converts the n-dimensional tracking problem to a first-order stabilization problem. To eliminate the chattering problem of SMC, the performance of T2FLC based VASS is clubbed with SMC and the new control approach is named as IT2FSMC. Using MATLAB/SIMULINK the simulation is performed by considering the Root Mean Square (RMS) value of body acceleration as the performance index. Simulation results such as sprung mass displacement, body acceleration, suspension deflection, tyre deflection and Power Spectral Density (PSD) of body acceleration show the effectiveness of the proposed IT2FSMC over SMC, T2FLC, T1FLC and passive system in suppression of the vibration of vehicle body.

• 出版日期2015-8