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4465results about How to "Adjustable position" patented technology

Unmanned surface vehicle trajectory tracking control device and method based on nonlinear control theory

The invention provides an under-actuated unmanned surface vehicle self-adaptive trajectory tracking control device and method. The device comprises a reference path generator, a state sensor, a differential converter, a parameter estimator, a virtual controller and a longitudinal thrust and bow steering torque controller. According to the unmanned surface vehicle actual position and course angle collected by the state sensor (2) and the reference position and reference course angle information generated by the reference path generator (1), the new state variable is obtained through the differential converter (5), the new state variable and the speed and angle speed information collected by a sensor (4) are transmitted to the parameter estimator (8) and the longitudinal thrust and bow steering torque controller (12), a control instruction is obtained through calculation to drive an execution mechanism, and the longitudinal thrust and bow steering torque of an unmanned surface vehicle are adjusted. According to the device and method, the unmanned surface vehicle can reach the specific position within specific time at specific speed. Due to the under-actuated unmanned surface vehicle, energy consumption and manufacturing cost of a system can be lowered, and the weight of the system is reduced.
Owner:精海智能装备有限公司

Device for manufacturing artificial blood vessel through combination of bio-printing and electro-spinning technologies

The invention discloses a device for manufacturing an artificial blood vessel through combination of bio-printing and electro-spinning technologies. The device comprises a material release unit, a rotary receiving unit, a horizontal moving platform, a vertical moving platform, a high-voltage power supply and a control unit, wherein the rotary receiving unit is located below the material release unit and comprises a rotary motor and a receiving rod; the rotary motor can drive the receiving rod to conduct rotary operation. The device has the following benefits: during operation, when the material release unit uses a bio-printing nozzle, a first stepping motor controls an extrusion pump to extrude out a cell-containing hydrogel material in a storage tank, and the extrusion pump can realize setting and controlling of the material release speed and quantity by the control unit; the vertical moving platform controls relative displacement of the whole material release unit to the rotary receiving unit, and can conduct vertical up-and-down displacement (such as 0.1 mm, 0.5 mm, 5 mm and continuous displacement), the displacement can be adjusted according to the extrusion requirement, and the distance between the bio-printing nozzle and the rotary receiving unit is adjusted through the displacement; the bio-printing nozzle and electro-spinning nozzles can work simultaneously or alternately, which is adjusted by the control unit according to actual demands.
Owner:THE SECOND HOSPITAL AFFILIATED TO SUZHOU UNIV
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