Proportional Logic

Views Updated: Dec 15, 2025

Abbreviation

Pronunciation

/prəˈpɔrʃənəl ˈlɑʤɪk/

Without any modification to the main hydraulic system circuits of the original loader operating devices, a complete electrohydraulic proportional pilot control systems, whose control logic were programmable, can be constructed.
Based on the manually operated hydraulic actuated directional control valves, the general solutions to the electro-hydraulic proportional control systems for loader operating devices, the electro-hydraulic proportional pilot control units, the structures and control logic of the programmable controllers were developed in details.
In this paper, a parameters self-tuning fuzzy PID control technique is developed to overcome the effect of the hysteresis and nonlinearity on piezoelectric actuators. It automatically tunes the proportional, integral and derivative gains of PID by a fuzzy logic controller.
On the basis of conventional trajectory, the guidance method of autonomous and proportional navigation has been chosen, the guidance law and its logic have been designed. All trajectory digital simulation for the cruise missile has been made.
By succession logic objects created and encapsulated, PLC program could be designed for electro-hydraulic proportional control system. Then controlling actual devices has been mapped as controlling virtual logic objects in hydraulic stamping press.

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