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| Content Provider | IET Digital Library |
|---|---|
| Author | Liu, Shida Hou, Zhongsheng Tian, Taotao Deng, Zhidong Guo, Lei |
| Abstract | In this work, an enhanced model-free adaptive control algorithm considering the time delay (EMFAC-TD) is proposed for a class of multi-input and multi-output systems and is further applied to the path tracking control problem of a self-driving wheel excavator. First, a preview-deviation-yaw-based method is first proposed for the simplification of excavator dynamics. Then, based on the simplified dynamics, the EMFAC-TD controller is designed via a novel dynamical linearisation technique with a time-varying parameter termed pseudo Jacobian matrix, which contains the coupling information of the excavator driving dynamics. Moreover, for the time delay of the excavator, EMFAC-TD method also handles it by introducing the Smith estimating method. The main feature of the proposed EMFAC-TD is that the controller is designed only based on the input and output data of the excavator. Further, the stability of the proposed EMFAC-TD is proved via rigorous mathematical analysis. The experimental results implemented on a real self-driving excavator show that the maximum tracking error of the excavator controlled via EMFAC-TD method can be limited as 0.3–0.7 m for different driving tasks, satisfying the practical requirement. The experimental results verify that EMFAC-TD method can improve the tracking performance and complete the required task successfully. |
| Starting Page | 220 |
| Ending Page | 232 |
| Page Count | 13 |
| ISSN | 17518644 |
| Volume Number | 14 |
| e-ISSN | 17518652 |
| Issue Number | Issue 2, Jan (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-cta/14/2 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2018.5493 |
| Journal | IET Control Theory & Applications |
| Publisher Date | 2019-10-07 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Adaptive Control Algebra Control Application to Materials Handling Control System Analysis Control System Synthesis Driving Tasks Dynamical Linearisation Technique EMFAC-TD Method Enhanced Data-driven Model-free Adaptive Control Approach Excavator Driving Dynamics Excavator Dynamics Excavators Jacobian Matrix Linearisation Technique Material Handling Equipment Maximum Tracking Error Motion Control Multiinput And Multioutput System Nonlinear Control System Output Data Path Tracking Control Problem Position Control Preview-deviation-yaw-based Method PseudoJacobian Matrix Self Adjusting Control System Smith Estimating Method Spatial Variables Control Stability Stability in Control Theory Synthesis Method Time Delay Time Varying Control System Time Varying System Time-varying Parameter Tracking Wheel Excavator |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications |
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