Abstract
In order to carry out an effective control for the semi-active suspension of an engineering vehicle, a nonlinear dynamics model for the vehicle semi-active suspension was established. A method based on the differential geometry theory and nonlinear state feedback transformation was proposed to perform the linearization for the nonlinear system of semi-active suspension. Furthermore, the optimal control of nonlinear state feedback was realized by using linear quadratic regulator (LQR), and the simulation experiment was conducted with Matlab/Simulink programming. The simulation results show that by adopting the linearization treatment based on differential geometry theory and the linear quadratic regulator (LQR) control, the vehicle ride comfort for semi-active suspension gets enhanced obviously compared with that for passive suspension, and most ride comfort indexes have the promotion of above 10%. The analysis conclusions can provide some references for the studies in both linearization of nonlinear system and semi-active control of vehicle suspension.
| Original language | English |
|---|---|
| Pages (from-to) | 400-404 |
| Number of pages | 5 |
| Journal | Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology |
| Volume | 33 |
| Issue number | 4 |
| Publication status | Published - Aug 2011 |
Keywords
- Differential geometry
- Dynamics
- Linear quadratic regulator (LQR)
- Linearization
- Nonlinearity
- Ride comfort
- Semi-active suspension
- State feedback