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A pre-compensation method of the systematic contouring error for repetitive command paths
D. L. ZHANG,Y. H. CHEN,Y. P. CHEN
Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 367-372 doi: 10.1007/s11465-015-0367-5
For a repetitive command path, pre-compensating the contouring error by modifying the command path
Keywords: contouring error pre-compensation motion control system back propagation (BP) neural network
GUO Tiecheng, CAO Xuebing, XIA Limin
Frontiers of Medicine 2008, Volume 2, Issue 4, Pages 406-409 doi: 10.1007/s11684-008-0078-y
Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives
Jianyong YAO
Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2, Pages 179-210 doi: 10.1007/s11465-018-0464-3
Hydraulic servo system plays a significant role in industries, and usually acts as a core point in control and power transmission. Although linear theory-based control methods have been well established, advanced controller design methods for hydraulic servo system to achieve high performance is still an unending pursuit along with the development of modern industry. Essential nonlinearity is a unique feature and makes model-based nonlinear control more attractive, due to benefit from prior knowledge of the servo valve controlled hydraulic system. In this paper, a discussion for challenges in model-based nonlinear control, latest developments and brief perspectives of hydraulic servo systems are presented: Modelling uncertainty in hydraulic system is a major challenge, which includes parametric uncertainty and time-varying disturbance; some specific requirements also arise ad hoc difficulties such as nonlinear friction during low velocity tracking, severe disturbance, periodic disturbance, etc.; to handle various challenges, nonlinear solutions including parameter adaptation, nonlinear robust control, state and disturbance observation, backstepping design and so on, are proposed and integrated, theoretical analysis and lots of applications reveal their powerful capability to solve pertinent problems; and at the end, some perspectives and associated research topics (measurement noise, constraints, inner valve dynamics, input nonlinearity, etc.) in nonlinear hydraulic servo control are briefly explored and discussed.
Keywords: hydraulic servo system adaptive control robust control nonlinear friction disturbance compensation repetitive
Title Author Date Type Operation
A pre-compensation method of the systematic contouring error for repetitive command paths
D. L. ZHANG,Y. H. CHEN,Y. P. CHEN
Journal Article
Repetitive transcranial magnetic stimulation causes significant changes of chemical substances in the
GUO Tiecheng, CAO Xuebing, XIA Limin
Journal Article