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On the basis of the analysis of structural characteristics and kinematics characteristics of plane two-DOF dual-truck parallel mechanism including workspace, forward kinematics, inverse kinematics solution, blind area avoiding, singular position and velocity and acceleration of mechanism feature point, the main controller designed by DSP chip and the THB7128-based stepper motor drives are focused...
In order to study the movement principle about the conjugate side of a new type opposed biconical cone screw high-pressure seawater hydraulic pump, motion analysis of the opposed biconical cone screw high-pressure seawater hydraulic pump is carried out by the establishment of surface equation, the surface and the solid model about the cone screw and bush which are the main components of the seawater...
In order to realize the closed loop control of diphase oppositing giant magnetostrictive hydraulic servo salve without the independent displacement sensor, the output displacement of the actuator was detected by measuring the change of the driver coil voltage drop, based on the characteristic that the magnetic permeability of magnetostrictive material changes under external load (inverse magnetostriction)...
The structure and feature of a novel water hydraulic proportional throttle valve were introduced, and its mathematical model of dynamic characteristics was established, and main factors affecting dynamic characteristics were determined by simulation analysis of software MATLAB / SIMULINK. The analysis shows that input signal step response characteristics of the novel valve are related to step amplitude...
In order to optimize the motion characteristics of slide-valve in water hydraulic servo-valve. Hydrostatic bearing technology has been used between valve core and sleeve. The research on performance about the static characteristics of slide-valve in water hydraulic servo-valve with hydrostatic bearing structure and traditional throttle with fixed orifice has been carried. The mathematical model of...
Structure and principle of a new kind of diphase opposition giant magnetostrictive self-sensing actuator (SSA for short) is introduced, for which a kind of double outputs high-precision digital control stable voltage power is designed. With the method of combining with the hardware design and the software setting, the controllability and reliability of the actuator are greatly improved. And the whole...
A new type of diphase oppositing giant magetostrictive self-sensing actuator force-feedback water hydraulic servo valve is introduced, including its structure and working principle. The electro-mechanical convert model of the diphase oppositing magetostrictive self-sensing actuator is established, based on this, the mathematical model of the servo valve is constructed. The static output characteristics...
A new type of water hydraulic proportional throttle valve is designed. The mathematical models of steady-state control characteristic, flow characteristic and load characteristic for the new designed water hydraulic proportional throttle valve are established, in addition some main factors influencing steady-state characteristic are determined, and some steady-state characteristic analysis such as...
The upper spontaneous potential produced by oil and gas accumulation is of a stable potential field, and its intensity is directly proportional to the content of the source and inversely proportional to the radius apart from the source. Theoretical research and practical results show that anomalies of spontaneous potential can indicate oil-bearing sandstone bodies and locate the areas of oil and gas...
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