Home
Navcon Engineering was contracted to conduct the modal survey of the High Energy Solar Spectroscopic Imager (HESSI) spacecraft. The primary objective was to identify the damped natural frequencies, damping factors and mode shapes in the frequency band between 70 Hz. and 170 Hz. |
The APS 0109 Zero-Position-Controller automatically controls the zero position of a vibration exciter irrespective of the payload. It is essential to employ a position controller of type APS 0109 especially when working with a vibration exciter without any integrated load compensation. |
The APS Dynamics series of air bearing long stroke vibration exciters provide excellent properties for low frequency excitation of accelerometers and other low frequency instruments and sensors. Some models have a horizontal air bearing table coupled to the driver unit that allows high payloads up to 23 kg e.g. |
SoundPLAN-essential is a single document application including all the basic information for noise control modeling and planning. It calculates noise from roads, railways or industrial noise sources. The computation can include one or multiple noise sources. |
Product Features: |
dBSea has been developed by Marshall Day Acoustics as a powerful tool for the prediction of underwater noise in a variety of environments. dBSea is ideal for the investigation of underwater acoustic problems involving single or multiple sources using solvers covering a wide frequency range. |
Principal Hardware Specification |
This module models the generation and propagation of low frequency sound in complex duct networks. The frequency range is limited to the plane wave region in the connecting pipes. It is based on linear acoustic theory and all elements, e.g., a complex muffler, are reduced to two-ports while terminations and sources are represented as one-ports. |