Nonlinear disturbance simulation and detection control system for astronomical telescope

Abstract

The invention discloses a nonlinear disturbance simulation and detection control system for an astronomical telescope. A simulated nonlinear disturbance signal is generated by program of an upper computer according to a nonlinear disturbance model; and the nonlinear disturbance simulation and detection control system further comprises a nonlinear disturbance simulation subsystem, a nonlinear disturbance detection subsystem and a software subsystem, wherein the nonlinear disturbance simulation subsystem consists of a PMAC (Programmable Multi Axis Controller), a disturbance torque motor and a motor driver; a shaft of the disturbance torque motor is connected with a telescope load through an elastic coupling to output a nonlinear disturbance torque; the nonlinear disturbance detection subsystem consists of a torque sensor and the PMAC; an analog quantity signal of the torque sensor is input into the PMAC motion controller and is compared with an upper computer command in real time to realize the closed loop of the torque; and the software subsystem realizes the simulations of nonlinear disturbance such as a wind load and the like by performing C language programming under Windows according to a nonlinear disturbance mathematical model. Compared with a system for physical simulation by adopting a physical model, the nonlinear disturbance simulation and detection control system provided by the invention is low in construction cost and is favorable in generality.

Description

Technical field [0001] The invention relates to a nonlinear interference simulation and detection control system, in particular to a nonlinear interference simulation and detection control system for astronomical telescopes. The system can be used to study the characteristics of non-linear interference of astronomical telescopes, and the study of anti-jamming control strategies and control algorithms. [0002] The present invention is a project of the National Natural Science Foundation of China "Research on Compensation of Low-temperature Nonlinear Interference in the Low-speed and High-precision Tracking of Antarctic Aperture Optical Telescope" (11073034) (Co-funded Project of "333" Project of Jiangsu Province) and National Natural Science Foundation of China "Research on the sliding state correction system of friction transmission for extremely large telescopes" (10778630). Background technique [0003] During the operation of the astronomical telescope, due to various non-line...

AI Technical Summary

Problems solved by technology

Digital simulation of telescope nonlinear interference is cheap and time-consuming, convenient and flexible. The disadvantage is that it is difficult to simulate in real time for fast systems. Whether the preset parameters are appropriate or not will directly affect the effect and credibility of the simulation.

The disadvantages of doing nonlinear interference research on specific telescopes are: (1) greatly prolonging the development time of astronomical telescopes; (2) in many cases, it is "remedial work", not "prevention", which has basically taken shape Non-linear interference problems have been found on the telescope. In fact, due to reasons such as funding and project progress, it is often impossible to fundamentally change the design, so we have to rely on algorithms, software, etc.

Although this method is the most popular at home and abroad, its shortcomings are also obvious: the composition is complicated, the cost is high, and the time-consuming is too long

Moreover, astronomical telescopes are often developed in a single piece, and there are few serialized products, so each one needs to be modeled, and the versatility is not strong.

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