Double-motor device on horizontal shaft of photoelectric tracking system and tracking and controlling method under synchronous driving

Abstract

The invention discloses a double-motor device on a horizontal shaft of a photoelectric tracking system and a tracking and controlling method under synchronous driving. The double-motor device comprises direct-current torque motors, a power driving module, a tachometer, a position coder, a horizontal shaft load and a control processor; one of the direct-current torque motors and the tachometer are arranged on one side of the horizontal shaft; the other of the direct-current torque motors and the position coder are arranged on the other side of the horizontal shaft; the horizontal shaft load is arranged in the middle of the horizontal shaft; and the control processor outputs control quantity to the power driving module so as to drive the two motors on the horizontal shaft to operate and work together. According to the invention, the two direct-current torque motors in the same specification can be stably tracked and controlled under the coaxial and synchronous driving, the size of a frame can be reduced under the same load condition, and a larger load output torque can be achieved without reducing the maximum no-load speed; and due to the balanced torque outputs at the two ends of the horizontal shaft, the rigidity of the whole horizontal shaft system is strengthened, so that the closed-loop control bandwidth of the system can be increased.

Description

Technical field [0001] The invention belongs to the field of capture and tracking, and relates to a new tracking device and control method, in particular to a horizontal axis dual-motor device of a photoelectric tracking system and a synchronous drive tracking control method. technical background [0002] With the development of today's science and technology, in the photoelectric tracking measurement system, the demand for tracking measurement distance and the type of measurement target is getting higher and higher. The photoelectric tracking measurement system is constantly developing in the direction of large-scale, that is, the observation aperture is getting larger and larger, and the single unit There are more and more types of system integrated detectors. This means that the requirements for the load torque that the motor can provide are increasing. However, the traditional single motor drive has the following limitations: on the one hand, the single motor is limited by t...

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Problems solved by technology

However, the traditional single motor drive has the following limitations: on the one hand, the single motor is limited by the output torque; on the other hand, the single motor drive will cause the drive torque at both ends of the horizontal axis to be unbalanced, making the resonance frequency of the horizontal axis lower At the same time, the single motor drive will cause the motor end of the horizontal axis to heat up, causing the horizontal axis to deform due to uneven temperature, affecting the shafting accuracy of the tracking rack

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