According to high accuracy

reliability and flexibility of attitude and orbit control liquid rocket engine ground test

a PXI (PCI extensions for instrumentation) controller based test measurement and control system was designed. The control system could operate 40 valves in manual

sequential and automatic modes. The measurement system could acquire 120 signals synchronously with fault diagnosis. The software was developed with LabVIEW in an ideology of modularization

providing favorable expansibility. A process-oriented panel was designed

and embedded control was integrated into the system to improve the reliability. Besides

the safety of fire test was guaranteed with emergency shutdown. To improve the accuracy

calibration was introduced together with a new impulse damping circuit. The test measurement and control system had been successfully implemented in many ground tests of attitude and orbit control liquid rocket engine. The design methods were proved in efficient enhancement of the expansibility and reliability. The accuracy of measurement and control was 0.5% and 0.1ms

respectively

fully fulfilling the ground test requirement of various attitude and orbit control liquid rocket engines.