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LIU Rong
PAN Huachen
CHEN Ying
Institute of Mechatronic Engineering,
Hangzhou Dianzi University,
Hangzhou 310018, China
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CONTROL STRATEGY FOR ELECTRO-
HYDRAULIC POSITION SERVO
SYSTEM WITH GENERALIZED
PULSE CODE MODULATION
Abstract: A hybrid control strategy
has been designed and developed for the electro-hydraulic
position servo control system with generalized Pulse code
modulation (GPCM), which is suitable for the area where the work
condition is poor and a large flow rate is required. It is
difficult to control the GPCM system because the system is
discrete. With consideration of the stability and speediness of
the GPCM position servo control system, a control strategy is
developed through the theoretical and experimental analyses. The
control strategy integrates the merits of Bang-Bang control, PID
control and fuzzy control. With this hybrid control strategy,
the electro hydraulic control system has good performances, and
the servo control is carried out with GPCM through on-off
valves.
Key words:
Generalized pulse code modulation (GPCM)
Position control
Electro hydraulic control |