Rotating compaction instrument control system and integrated control method thereof

Abstract

The invention discloses a rotating compaction instrument control system. The system mainly comprises: a rotating speed control module, an angle control module, a pressure control module, a displacement sensor, a protection door switch sensor, a communication module and a main computer. The communication module collects data of the each control module and the sensor, performs block encoding and format conversion to the data. Then the data is sent to the main computer for post processing. Control parameters which are adjusted by the main computer are sent to the each control module. The invention also discloses a rotating compaction instrument control method. The rotating speed is controlled by using an intelligent brushless direct-current motor direct torque control method. The angle and pressure are controlled by using a stepping-motor closed-loop control method. A compaction process requirement can be satisfied under combined effects of three main technology conditions: the specified compaction rotating speed, the constant vertical pressure and the constant compaction angle. The pressure, the angle and the rotating speed can be real-timely and dynamically adjusted according to actual test and scientific research demands.

Description

technical field [0001] The invention relates to a control system of a gyratory compactor. The system utilizes DSP to realize the real-time acquisition and control of data of the gyratory compactor, and the main computer performs analysis, processing and parameter adjustment. It also relates to a comprehensive control method, especially The invention relates to a direct torque control method of an intelligent brushless DC motor and a closed-loop control method of a stepping motor. Background technique [0002] The gyratory compactor is one of the basic equipment for making asphalt mixture specimens, mainly including mechanical structure, corresponding control devices and methods. The research and design of the mechanical structure of the gyratory compactor is relatively mature. For example, the utility model patent gyratory compactor (ZL200620010462.2) and the new gyratory compactor (ZL 200620010462.2) have studied this issue, but the control system of the gyratory compactor ...

AI Technical Summary

Problems solved by technology

And the brushless DC motor parameters are affected by temperature and magnetic saturation, which has serious nonlinearity

When the parameters, reference or disturbance of the system change too much, the system cannot meet the requirements of fast response speed and high steady-state accuracy under time-varying conditions, and the system cannot even operate at low speeds.

[0007] (2) At the same time, if the brushless DC motor switch selection table is divided into 6 sectors for direct torque control, there will be a vector error between the actual selected space voltage and the expected space voltage, which will bring torque and The problem of large current pulsation

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