Empirical modelling and simulation of transmission loss between wireless sensor nodes in gas turbine engines

Abstract

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Wireless Communication Networks for Gas Turbine Engine Testing

“…This suggests that the multipath in engine testing environment has negligible influence on the link quality and thus there is no need for a multipath model. Nevertheless, besides the path loss, the thermal noise and environmental interference are also taken into account in our model (as shown later in this section) to give a better link quality simulation [3].…”

“…Development and production testing takes place under the extreme environmental conditions summarised in Table 1. In addition to the extreme vibration and temperature environment within which the wireless communication network has to work, interferences due to other industrial electrical/electronic devices may also have an adverse impact on the performance of the wireless link [3].…”

Development and validation of a simulator for wireless data acquisition in gas turbine engine testing

“…A realistic channel model specifically for engine testing was built from a series of transmission gain measurements carried out at Rolls-Royce's engine testing site with and without an engine cowling [9]. The developed channel model is comprised …”

“…The signal-noise-ratio per bit is calculated as (8) where W is the bandwidth depending on the PHY layer and R b is the bit rate depending on the modulation scheme. Given a specific digital modulation scheme, the BER is calculated by (9) for DBPSK/DQPSK, and (10) for M-ary QAM (Quadrature Amplitude Modulation) without CCK, and (11) for M-ary QAM (Quadrature Amplitude Modulation) with CCK. Thus, the possibility of correctly receiving a packet is (12) where l is the packet length in bits.…”

“…The receiver frontend noise is modeled as additive white Gaussian noise (AWGN). The radio channel model built from the measurements is a waveform model developed in MATLAB/SIMULINK [9], where the transmission signal, interference signal and thermal noise are expressed as their electric fields. However, the waveform model typically uses many samples per bit with a (2) where AEA is the Antenna Effective Area given by…”