scholarly journals Digital control of servo system for a powered orthosis for paralyzed lower limbs

1988 ◽  
Vol 2 (2) ◽  
pp. 80-85
Author(s):  
Tsuyoshi SUZUKI ◽  
Hiroyuki MIYAMOTO ◽  
Akira SANO ◽  
Yasuhisa SAKURAI
Keyword(s):  
Digital Control ◽  
Servo System ◽  
Lower Limbs ◽  
Paralyzed Lower Limbs

Basic Study on a Powered Orthosis for Paralyzed Lower Limbs

1984 ◽  
Vol 17 (2) ◽  
pp. 3025-3029
Author(s):  
H. Miyamoto ◽  
T. Torii ◽  
K. Gomi ◽  
A. Sano ◽  
S. Mori ◽  
...  
Keyword(s):  
Lower Limbs ◽  
Basic Study ◽  
Paralyzed Lower Limbs

Design of Interface Circuit of CPLD-Based Photoelectric Encoder

2011 ◽  
Vol 305 ◽  
pp. 149-153 ◽  
Author(s):  
Hong Bo Liao ◽  
Xiao Yao Zhou ◽  
Lian Chao Zhang ◽  
Da Peng Fan
Keyword(s):  
Angular Velocity ◽  
Digital Control ◽  
Servo System ◽  
Time Intervals ◽  
Interface Circuit ◽  
Velocity Measure ◽  
Photoelectric Encoder ◽  
Solid Foundation ◽  
High Measure

A CPLD-based Photoelectric encoder that measures angle and angular velocity was designed aiming at precise requirements on angle and angular velocity measures in photo-electric servo system. Based on the work principle of photoelectric encoder, a segmented velocity-measure algorithm based on different measure time intervals was presented, and the concrete process in the environment of Isplever Project Navigator was detailed described. Finally, DSP processor TMS320F2812 and CPLD chip LC4512V-75T176 were used for verification. The result showed that this circuit has the features of realization-simple, high measure precision and reliability as well as good commonality. It will lay a solid foundation for the realization of photoelectric servo system’s digital control.

Effect of maximal arm exercise on skin blood flux in the paralyzed lower limbs in persons with spinal cord injury

1996 ◽  
Vol 74 (5) ◽  
pp. 481-483 ◽  
Author(s):  
Satoshi Muraki ◽  
Masahiro Yamasaki ◽  
Yoshito Ehara ◽  
Kunio Kikuchi ◽  
Kunihiro Seki
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Lower Limbs ◽  
Arm Exercise ◽  
Cord Injury ◽  
Paralyzed Lower Limbs

Research on Digital Control of Tension Servo System Based on PLC

2012 ◽  
Vol 614-615 ◽  
pp. 1445-1448
Author(s):  
Chong Chen ◽  
Guo Wen Hu
Keyword(s):  
Control System ◽  
Digital Control ◽  
Disturbance Rejection ◽  
Servo System ◽  
Tension Control ◽  
First Order ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Tension Control System ◽  
Upper Computer

Mathematical model of tension servo system drived by two induction motor is analyzed in this paper. Then, structure optimized of first-order active disturbance rejection control (ADRC) of tension servo system is designed. Double channels compensation of extended state observer is used to estimate and compensate the total disturbance of system, and approximate linear and determined treatment is done to the tension control system. S7-300 PLC is used as lower computer controller, while WinCC is used as upper computer monitor software, realizing all-digital control of the system. The experiments is carried on based on S7-300 PLC experimental platform and the results prove that the decoupling control of speed and tension is realized, and the control system has higher dynamic, static status and robustness performances.

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