Double-motor synchronous control system and synchronous control method thereof

Abstract

The invention discloses a double-motor synchronous control system. The double-motor synchronous control system comprises two motor cascade control parts and a synchronous controller, wherein the motor cascade control parts are used for setting parameter information and a control mode of a motor, driving the motor to operate according to the parameter information and the control mode, and outputting the actual speed or actual position of the motor according to the control mode; and the synchronous controller is used for receiving the actual speed or actual position of the motor, and compensating the motion of the motor according to a set rotation speed or a set position. The double-motor synchronous control system provided by the invention has the advantages of reducing the control cost, and improving the motion accuracy.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a dual motor synchronous control system and a synchronous control method thereof. Background technique [0002] With the development of motion control technology, motor synchronous control technology has been used more and more in various technical fields. Consequently, the requirements for motor synchronous control technology are getting higher and higher. In addition to requiring high-precision control effects in some conventional systems, it must also be well applied in some special needs. For example: one of the working methods of medical CT is helical scanning. In this method, the rotating frame of the CT machine is required to rotate at a uniform speed, and the moving bed carrying the patient is required to perform a uniform horizontal movement. The two have a certain position correspondence to achieve The purpose of uniform projection sampling. The rotating frame carries...

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Problems solved by technology

The rotating frame carries each module of the system, and the load of the driving motor of the moving bed is very different. The large inertia speed regulation responds slowly, but it is easy to maintain the running state. Moreover, the two motors (rotating frame motor and moving bed motor) are under synchronous control. The load disturbances encountered in the process are different in form, one is a periodic large load disturbance, and the other is a constant small disturbance, which makes the amplitude and phase angle of the two motors inconsistent during the synchronization process, affecting the synchronization effect

[0003] In the existing medical CT products, the driving method of the transmission chain increases the number of components in the frame, and the inherent step loss problem of the stepping motor reduces the accuracy of the movement, and the motion control card used is not only expensive but also has a single function. The control of different motor models does not have wide compatibility, and it cannot be well realized for some special applications, and has great limitations.

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