Input signal shaping control method in multi-sampling-rate system

Abstract

The invention relates to an input signal shaping control method in a multi-sampling-rate system, and the method comprises the steps: converting a step signal inputted by an outer ring into an input signal with a limited frequency band in a limited beat of inner ring sampling through an input signal shaping control method on the basis of a hardware architecture of an existing multi-sampling-rate stable tracking system; high-frequency quantization information caused by low sampling rate of an outer loop is eliminated, and effective signals of a low-frequency band are reserved. By means of the advantage of high sampling rate of an inner loop, a transition process is arranged, an input signal is changed according to an expected form, excitation to an inner loop is reduced, good compromise between rapidity and stability indexes of a control system is achieved, the disturbance suppression capacity of the photoelectric stable tracking system is enhanced, the dynamic characteristic of the system is improved, and the method has wide application prospects.

Description

technical field [0001] The invention relates to an input signal shaping control method in a multi-sampling rate system, belonging to the technical field of photoelectric detection. Background technique [0002] The main task of the airborne electro-optical stabilization platform is to isolate the disturbance of the carrier base, and to control and adjust the optical axis pointing to the target in real time according to the off-target amount generated by the imager, so as to realize the stable tracking of the maneuvering target and ensure the stable orientation of the optical axis in the inertial space. However, due to the difference in sampling rate of each sensor in the optoelectronic stabilization platform, the stability tracking system of the airborne optoelectronic stabilization platform becomes a multi-sampling rate control system. The difference in sampling rate makes the design of the stabilization tracking control system difficult, and often the outer loop The design...

AI Technical Summary

Problems solved by technology

[0004] In the actual system, due to the limited power and the existence of unmodeled characteristics of the control system and the vibration constraints of the airborne environment, the obvious input signal step will stimulate the stability of the inner loop control system to decline or even leave the linear region and enter the saturated nonlinear region. , which seriously affects the improvement of the dynamic performance of the photoelectric stabilization tracking system

Because the optoelectronic stabilized platform needs to realize the instruction and tracking of the maneuvering target, the speed range is very wide, and the traditional digital control algorithm is difficult to meet the requirements of stability and fast response at the same time. Therefore, it is necessary to use the flexibility of the digital control algorithm to properly Modify the shape of the input signal, retain low-frequency useful information, reduce the excitation of the unmodeled characteristics of the inner loop, keep the control system within the linear region, and improve the dynamic accuracy of the stable tracking system

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