Real Time Simulated Test Platform for Electric Power Line Replaceable Unit Closed Loop Testing 2020-01-0018
Aerospace application Line Replaceable Unit (LRU) development is tedious process involving hardware development and software development. Detail testing to be performed as per design assurance level (DAL) level of the system in which the LRU used. LRU design and developed for control application of a system to be tested on the real plant/system. Early system requirements validation during development stage using real plant / system involves high risk causing damage to system impacts high lead time to fix the system or most of time system itself is not built yet or system not available at the location of LRU design and development for system functional testing. However real-time simulation environment can address these limitations of system testing.
Real time simulation environment is one platform extensively used for control system validation during initial stage of LRU design and development by simulating plant model / system. Correctness of the control algorithm, software implementation, hardware design can be checked during design and development stage which reduces the errors later during system integration lab (SIL) test. Any real-time simulation platform is restricted to interface low voltage and currents only which are executed as low power simulator. This imposes limitations to test LRU complete functionality. There is need to convert voltage / current signal to actual LRU / system engineering signal which will enable system functional testing at LRU level.
This papers details about the amplification and signal conditioning circuit externally implemented and interfaced between LRU and real-time simulator. OpalRT real time simulation platform is used to demonstrate LRU testing. The system executed for demonstration is high power synchronous generator (>100 KVA), while generator control unit (GCU) being the LRU.