Rotational speed control method for pilot injection type numerical control air-powered engine

Abstract

The invention discloses a rotational speed control method for a pilot injection type numerical control air-powered engine. The method comprises the following steps of: respectively inputting an expected rotational speed into a feed forward control unit and a proportion integration differentiation (PID) control unit through a rotational speed operating device, respectively inputting real-time rotational speed to the feed forward control unit and the PID control unit through a rotational speed sensor, and inputting a torque measuring value at an output end of a crankshaft to the feed forward control unit through a torque sensor; calculating a mean load at the expected rotational speed through feed forward control; calculating master control pressure which corresponds to the expected rotational speed, calculating difference between the expected rotational speed and a real-time rotational speed filtering value through the PID control unit, and calculating the fine-tuning control pressure; and finally, taking the sum of the master control pressure and the fine-tuning control pressure as integral control pressure, inputting the integral control pressure to a pilot injection cylinder of the pilot injection type numerical control air-powered engine, and performing rotational speed operation on the pilot injection type numerical control air-powered engine. By the method, the change of real-time load and the rotational speed operation of the pilot injection type numerical control air-powered engine can be conveniently, accurately and rapidly reflected.

Description

technical field [0001] The invention belongs to the technical field of rotational speed control of pneumatic motors, in particular to a rotational speed control method of a pre-spray numerical control pneumatic motor. Background technique [0002] Pneumatic motors use compressed air from a wide range of sources as "fuel" and emit no pollution. They are truly "zero-emission" and environmentally friendly power sources. It can provide driving power for environmentally friendly and energy-saving vehicles. Its function is to convert the pressure energy of compressed air into the mechanical energy of crankshaft rotation to drive the vehicle. [0003] Pneumatic motors are generally composed of air storage tanks, engine bodies, pressure reducing valves, flow control valves, and gas pipelines. The compressed air stored in the air storage tank passes through the air pipeline, pressure reducing valve, flow regulating valve, air inlet, cylinder and exhaust port, and finally enters the ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defect of inconvenient operation of the existing pre-injection numerical control pneumatic engine speed control device, the present invention provides a speed control method for the pre-injection numerical control air engine which is simple in structure, easy to operate, low in cost and easy to adapt to real-time load. method to accurately and quickly respond to the rotational speed manipulation of a pre-injection numerically controlled air motor

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