TY - GEN
T1 - Design of acceleration control system considering current dynamics
AU - Tanaka, Hiroyuki
AU - Ohnishi, Kouhei
AU - Nishi, Hiroaki
PY - 2009/7/17
Y1 - 2009/7/17
N2 - Sampling periods in digital control systems have been shortened thanks to the development of both hardware and software technologies. In recent years, FPGA (Field Programmable Gate Array) has been applied to robot systems to achieve hard real-time system with short sampling periods. Due to the short sampling periods, the effect of the time quantization has been reduced. Some other hardware restrictions, however, become critical issue. In this paper, current dynamics in motor driver is considered as the hardware restriction. The current response dynamics acts as a low-pass filter, and it can be the restrictions of performance improvement. In the proposed method, the dynamics is modeled as low-pass filter, and the modeled dynamics is compensated by a phase-lead compensator. The tracking performance in an acceleration control system is improved by the proposed method. The effectiveness of the proposed method is validated through simulations and experimental results.
AB - Sampling periods in digital control systems have been shortened thanks to the development of both hardware and software technologies. In recent years, FPGA (Field Programmable Gate Array) has been applied to robot systems to achieve hard real-time system with short sampling periods. Due to the short sampling periods, the effect of the time quantization has been reduced. Some other hardware restrictions, however, become critical issue. In this paper, current dynamics in motor driver is considered as the hardware restriction. The current response dynamics acts as a low-pass filter, and it can be the restrictions of performance improvement. In the proposed method, the dynamics is modeled as low-pass filter, and the modeled dynamics is compensated by a phase-lead compensator. The tracking performance in an acceleration control system is improved by the proposed method. The effectiveness of the proposed method is validated through simulations and experimental results.
UR - http://www.scopus.com/inward/record.url?scp=67650330001&partnerID=8YFLogxK
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U2 - 10.1109/ICIT.2009.4939587
DO - 10.1109/ICIT.2009.4939587
M3 - Conference contribution
AN - SCOPUS:67650330001
SN - 1424435064
SN - 9781424435067
T3 - Proceedings of the IEEE International Conference on Industrial Technology
BT - 2009 IEEE International Conference on Industrial Technology, ICIT 2009
T2 - 2009 IEEE International Conference on Industrial Technology, ICIT 2009
Y2 - 10 February 2009 through 13 February 2009
ER -