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This paper presents a simulation study of the realtime determination of the elastic mode characteristics (frequency and displacement mode shape) of a launch vehicle using an array of sensors that measure the local strain along the length of the vehicle. The determination of the frequency and shape of the excited modes is accomplished using the buffered strain data. We assume that the sensed data is...
Various control applications such as aerospace vehicles and automotive control systems can benefit from lower weight and cost. Replacing wired feedback control with wireless sensor and actuator networks (WiSAN) offers attractive features by improving upon the weight and cost problems, while posing new challenges due to the delayed noisy feedback links. Addressing these challenges requires modeling...
This paper presents a new method for timing synchronization in mobile transceivers utilizing direct sequence spread spectrum signaling (DSSS) for target localization. Traditional methods of timing synchronization for DSSS produce variable latency that depends on channel characteristics and configuration. This latency produces bias in range measurements which causes errors in position estimation. Our...
Time synchronization is a fundamental problem in any distributed system. In particular, wireless sensor networks require scalable time synchronization for implementing distributed tasks on multiple sensor nodes. This paper proposes an energy efficient Coefficient Exchange Synchronization Protocol (CESP) based on a receiver-receiver synchronization scheme that minimizes the impact of access-time delays...
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