Entity

Time filter

Source Type


Chen H.,Key Laboratory for Intelligent Control and Decision of Complex Systems | Chen H.,Beijing Institute of Technology | Liu X.,Key Laboratory for Intelligent Control and Decision of Complex Systems | Liu X.,Beijing Institute of Technology | And 2 more authors.
2015 IEEE International Magnetics Conference, INTERMAG 2015 | Year: 2015

In order to get a better dynamic response for actuator in condition of low-speed, a permanent magnet synchronous motor (PMSM) in direct-drive application with the characteristics of high-bandwidth, low-speed and high-torque was designed and researched in this paper. © 2015 IEEE. Source


Xiong R.,Key Laboratory for Intelligent Control and Decision of Complex Systems | Xiong R.,Beijing Institute of Technology | Liu X.,Key Laboratory for Intelligent Control and Decision of Complex Systems | Liu X.,Beijing Institute of Technology | And 2 more authors.
Key Engineering Materials | Year: 2015

Piezoelectric actuator(PEA) is widely applied in micro/nano positioning system. However, its inherent hysteresis limits its application. Modeling of hysteresis plays an important role in solving this problem. Linear play operators (LPO) adaptive hysteresis model is introduced in this paper. LPO operators are used to replace delay operators of adaptive transversal filter to compose a new serial structure of adaptive transversal filter model, and LMS (Least Mean Square) algorithm is used to adjust the weight values. As hysteresis loop of piezoelectric actuator is asymmetric and LPO operator is symmetric, a modified LPO (MLPO) adaptive filter is proposed for asymmetric hysteresis effect. At last, the two LPO filters are applied to model hysteresis characteristic of Piezoelectric actuator, and the modeling effect is verified via a micro-positioning system experiment platform based on Piezoelectric actuator. Experimental results show that the modified LPO filters can achieve better accurate hysteresis modeling. © (2015) Trans Tech Publications, Switzerland. Source


Liu X.,Key Laboratory for Intelligent Control and Decision of Complex Systems | Liu X.,Beijing Institute of Technology | Wang Y.,Key Laboratory for Intelligent Control and Decision of Complex Systems | Wang Y.,Beijing Institute of Technology | And 4 more authors.
Sensors and Actuators, A: Physical | Year: 2013

A novel adaptive transversal filter modeling is presented for the hysteresis characteristic in PEA (piezoelectric actuator). First, the hysteresis modeling capability of delay operator based adaptive transversal filter is explored. On this basis, delay operators of adaptive transversal filter are replaced with Backlash operators to compose a new serial structure of adaptive transversal filter model, and LMS (least mean square) algorithm is used to adjust the weight values. And then, as LMS algorithm brings a serious confrontation of the convergence speed and steady-state offset, a new improved adaptive method focus on the convergence factor is brought in. The new filter with this improved algorithm makes the contradiction of convergence speed and steady-state offset could be unified to some extent. At last, the two adaptive transversal filters are applied to model for hysteresis characteristic of PEA, and the modeling effect is verified via a micro-positioning system experiment platform based on PEA. Experimental results show that the proposed Backlash operator based adaptive filter can achieve accurate hysteresis modeling, and the effectiveness of the improved adaptive algorithm is also demonstrated. © 2012 Elsevier B.V. Source

Discover hidden collaborations