TAILIEUCHUNG - Challenges and Paradigms in Applied Robust Control Part 8

Tham khảo tài liệu 'challenges and paradigms in applied robust control part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Robust Control of Electro-Hydraulic Actuator Systems Using the Adaptive Back-Stepping Control Scheme 199 Fig. 4. Estimated value for the system uncertainties of the ABSC system for the sinusoidal reference input Fig. 5. Tracking errors of the BSC and ABSC systems with the perturbation of the system parameters 200 Challenges and Paradigms in Applied Robust Control Figure 5 shows the tracking errors of the BSC and ABSC systems having perturbations of the system parameters such as the Coulomb friction viscous friction and pump leakage coefficient in the EHA system for the sinusoidal reference input. It was assumed that the system parameters have a perturbation of 50 . From Fig. 5 it was found that the perturbations of the system parameters of the EHA system are closely related with the tracking performance of the EHA system. Table 2 shows the tracking RMS errors of the BSC and ABSC systems according to the perturbation of the system parameters. The variations of the tracking RMS errors due to the 50 perturbation of the system parameters for the BSC and ABSC systems are and respectively. These results show that the proposed position control scheme has the desired robustness to system uncertainties such as the perturbation of the viscous friction Coulomb friction and pump leakage coefficient. Control scheme Perturbation ratio RMS value BSC 0 mm 50 mm ABSC 0 mm 50 mm Table 2. Tracking RMS errors of the BSC and ABSC systems according to the perturbations of the system parameters 5. Experimental results and discussion Figure 6 shows the experimental setup of the EHA system. To evaluate the effectiveness of the proposed control system the PCM-3350 AMD Geode processor 300MHz was used. The control algorithms were programmed by Turbo-C language on MS-DOS in order to directly handle the PCM-3718 as a data acquisition board. The PCM-3718 is a fully multifunctional card with PC 104 interface. In addition to measure the position of the piston an .

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