Rudder Control Circuit Testing System Based On PCI Data Acquisition Device

The rudder control circuit is the core control part of the flight control system. Steering gear control circuit is through the size and polarity signal manipulation of the steering rudder and aileron or changing engine thrust vector, in order to control and stabilize the vehicle flight. The reliability and stability of the servo control circuit is very important. So it is necessary to test the steering gear control circuit in the production practice. According to the test requirement of a new type of aircraft rudder control circuit, a testing system of the servo control circuit is developed.The method of virtual instrument is used in the test system of servo control circuit. The hardware is made up of industrial control computer, PCI board, GPIB standard instrument and self-made circuit. The self made circuit is mainly composed of a signal conditioning circuit, a power supply control circuit, a circuit switching circuit and a product adapter circuit. Signal conditioning circuit will be the main resistance, current and voltage, and the signal to be measured for conversion and conditioning, which is suitable for data acquisition card test, a power supply control circuit for the power supply management, including electricity and protect, path switching circuit to be measured signal switch to the measuring path, product adaptation circuit choose the products to be tested. The software is written in LabVIEW. The test software uses the modular design idea, according to the product test function to design the corresponding test procedure, carries on the automatic collection, the analysis computation to the product performance parameter, and displays, stores, the test report. The system can simultaneously test three products and has the function of remote data transmission, greatly improve the work efficiency, reduce the burden of testing personnel, reduce human error. The system has passed the acceptance test, and is used for production test.