Design Of Integral Test System Of Dynamically Tuned Gyroscope

As one angle-sensitive element, gyroscope is widely used in aviation domain, such as missile, rocketry, satellite, submarine, etcetera and so on. Gyroscope can be sensitive to the angular variation of the carrier, with its characteristics of precession and inertia. And Dynamically Tuned Gyroscope (DGT) has been widely applied, due to its technical superiority and cost advantage. With the development of aerospace technology, the situation puts forward higher requirements for design and manufacture of DTG, and the control procedure is more complex. To obtain more precise decoupling circuit and rebalance controller, we must make quantitative analysis of the parameter of DTG. And we must firstly build up the mathematical model which can reflect the basical system features.However, restricted by production process level, the actual parameters of DTG are not in complete agreement with design parameters, and the true value could only be obtained by estimation and experiences. This brings great difficulties in System modeling and analysis. Especially in the follow-up rebalance loop, the circuit design and debugging could only be accomplished by method of trial-and-error, which greatly reduces the work efficiency and causes different batchs of DTGs can't have the same parameters.With respect to this situation, we developed one DTG parametric test system based one the programming tool of Lab VIEW, and accomplished the following works:With the existing TZS-74 gyroscope integral test revolving table, we redesigned one drive and control system, which is based on the Lab VIEW. And at first we maked detailed analyses of the open-loop transfer function of the gyroscope. And then with the revolving table, we built up a gyroscope model parameter identification system which is based on the computer and data acquisition card. By means of data acquisition card, we could gain the synchronal data and systematically analyze the data with the Lab VIEW System Identification Toolkit, and built up the mathematical model of controlled object. Finally by comparing the simulation results and the measured data, we could make assessment of the correctness of the model. The identification results can be used as the design basis of gyroscope controller. Furthermore, aiming at different performance parameters of DTG, we also developed different test programs, which could quickly acquire important parameters of DTG, such as random drift, time constant and quality factor.