Adaptive current compensation with nonlinear disturbance observer for single-sided linear induction motor considering dynamic eddy-effect
来源期刊：中南大学学报(英文版)2015年第5期
论文作者：DENG Jiang-ming CHEN Te-fang CHEN Chun-yang
文章页码：1716 - 1724
Key words：single-sided linear induction motors (SLIMs); current compensation; adaptive control; dynamical response; nonlinear disturbance observer (NDOB)
Abstract: An adaptive current compensation control for a single-sided linear induction motor (SLIM) with nonlinear disturbance observer was developed. First, to maintain t-axis secondary component flux constant with consideration of the specially dynamic eddy-effect (DEE) of the SLIM, a instantaneously tracing compensation of m-axis current component was analyzed. Second, adaptive current compensation based on Taylor-discretization algorithm was proposed. Third, an effective kind of nonlinear disturbance observer (NDOB) was employed to estimate and compensate the undesired load vibrations, then the robustness of the control system could be guaranteed. Experimental verification of the feasibility of the proposed method for an SLIM control system was performed, and it showed that the proposed adaptive compensation scheme with NDOB could significantly promote speed dynamical response and minimize speed ripple under the conditions of external load coupled vibrations and unavoidable feedback control variables measured errors, i.e., current and speed.
DENG Jiang-ming(邓江明)1, CHEN Te-fang(陈特放)1, 2, CHEN Chun-yang(陈春阳)2
(1. School of Information Science and Engineering, Central South University, Changsha 410075, China;
2. School of Traffic Transportation and Engineering, Central South University, Changsha 410075, China)
Abstract:An adaptive current compensation control for a single-sided linear induction motor (SLIM) with nonlinear disturbance observer was developed. First, to maintain t-axis secondary component flux constant with consideration of the specially dynamic eddy-effect (DEE) of the SLIM, a instantaneously tracing compensation of m-axis current component was analyzed. Second, adaptive current compensation based on Taylor-discretization algorithm was proposed. Third, an effective kind of nonlinear disturbance observer (NDOB) was employed to estimate and compensate the undesired load vibrations, then the robustness of the control system could be guaranteed. Experimental verification of the feasibility of the proposed method for an SLIM control system was performed, and it showed that the proposed adaptive compensation scheme with NDOB could significantly promote speed dynamical response and minimize speed ripple under the conditions of external load coupled vibrations and unavoidable feedback control variables measured errors, i.e., current and speed.
Key words:single-sided linear induction motors (SLIMs); current compensation; adaptive control; dynamical response; nonlinear disturbance observer (NDOB)
