There are some problem for Strip transmission process, such as low deviation information accuracy , poor reliability, poor control results,the electro-hydraulic servo central position control system of Strip based on the principle of differential capacitance was designed. The differential connection is used for eliminating signal drift and the nonlinear characteristics,high frequency power supply is used for reducing output impedance and improving the system bandwidth, double shielded is used for eliminating the impact of parasitic capacitance, the electro-hydraulic servo central position control system based on fuzzy PID is designed. Research shows that the measuring circuit and control system are with high precision, good reliability, maintenance-free advantages.
The parameters uncertainty and external disturbance play a negative role to improve electro-hydraulic position servo system performance. The valve controlled cylinder system model is established, using the traditional PID control strategy and reaching law control strategy for simulating the system, respectively, the two methods have similar control effects in the ideal model, but considering the external disturbances, the index approaches sliding mode control law has better response speed and stability. Research shown that sliding mode control algorithm has an important role for improving the performance of hydraulic servo position control system.
In this paper, the framework of hierarchical parallel control architecture based on competitive mechanism is highlighted to present reconfigurable hardware logic and algorithms of network-based motor control, and application for the open mobile robot's control system is demonstrated to address a special kind of strong coupling of mechanical and electrical hardware, the interchange of propulsive wheel and the passive wheel of mobile robot.PA:>Pl'lsi~""""&eI I I Steerlngdev"", I -rr-.,..,.. Fig. I The configuration scheme of the control system logic and distr ibution distance data, GPS provides position information, keyboard, mouse and micro-LCD provide human-computer interface.
B. Industrial PC 104The control system is based on the reliable PCI04 and networks for the DC motors. Spot-to-spot data communication can be implemented via the RS232/485 networks as well as the variation of the on-line motor motion mode. Thus, the multi-actuation and open control system can be implemented. The core module is SCM/SPT4 with 256 MB SDRAM, display module CDT800 , relay module IR I04, power module HE I04, and serial module EMM-8M-XT . It also supports USB 2.0 for program debugging. The CDT800 module provides 16 counters/timers. The IRlO4 module provides 20 groups photoelectric-isolation digital input with 20 relayoutput, and HE104 provides ±5V, ± 12V DC power, while EMM-8M-XT expands eight serial interfaces.
C. Open DC motor control netThe motors of wheels and steering mechanism are the products of Faulhabor Group [13]. These motors have short 978-1-4244-2693-5/09/$25.00
Electric-hydraulic servo system is a nonlinear and uncertain system with time-varying parameters and interference. The fuzzy PID control algorithm is used,which not only keep the flexible characteristic of fuzzy control algorithm but also inherit the traditional PID control algorithm advantages of high control precision. Research shows that fuzzy PID control has the character of fast response speed, rising fast, small lag, small overshoot, anti-interference, do not depend on the accurate model.
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