Optimal and nonlinear decoupling control of systems with sandwiched backlash

被引：117
作者：
Tao, G [1 ]
Ma, XL [1 ]
Ling, Y [1 ]
机构：
[1] Univ Virginia, Dept Elect Engn, Charlottesville, VA 22903 USA
来源：
AUTOMATICA | 2001年 / 37卷 / 02期
基金：
美国国家卫生研究院; 美国国家航空航天局; 美国国家科学基金会;
关键词：
backlash; compensation; feedback linearization; joint flexibility and damping; multivariable nonlinear systems; optimal control; tracking;
D O I：
10.1016/S0005-1098(00)00153-9
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A scheme is proposed for control of multi-body, multi-input and multi-output nonlinear systems with joint backlash, flexibility and damping, represented by a gun turret-barrel model which consists of two subsystems: two motors driving two loads (turret and barrel) coupled by nonlinear dynamics. The key feature of such systems is that the backlash is between two dynamic blocks. Optimal control schemes are employed for backlash compensation and nonlinear feedback control laws are used for control of nonlinear dynamics. When one load is in contact phase and the other load is in backlash phase, a feedback linearization design decouples the multivariable nonlinear dynamics so that backlash compensation and tracking control can be both achieved. Nonlinear zero dynamics systems caused by joint damping are bounded-input, bounded state stable so that feedback linearization control designs ensure that all closed-loop signals are bounded and asymptotic tracking is achievable. Simulation results verify the desired system tracking performance. (C) 2000 Elsevier Science Ltd. All rights reserved.
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页码：165 / 176
页数：12
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