Emulates HPAC (High Pressure Air Compressor) telemetry data using a REST API.
Sensors are enumerated within an embedded json file, with their average, high and low values and possible noise sources. Noise sources can be either gaussian, white or sawtooth, and they are additive. There is no limit to the number of noise sources, though having more sources than types of sources doesn't really make sense.
If the sensors have error codes associated with them for going out of range, those are thrown if and when the sensors are out of range.
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## Container Requirements
**Software Requirements**:
**Memory Requirements**: 512 MiB RAM
**CPU Requirements**: 1 CPU core from a 2.4GHz Intel Core i5-6300U or equivalent processor.
**Disk Requirements**: 1 GiB of local storage
**Storage volume Requirements**: HPAC-EM doesn't require a storage volume directly. Data generated by the HPAC-EM sends data to the Peaxy Neptune application where it will be stored within a Postgres database.
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## API Overview
This service runs on port `6310`.
#### POST /start/{id}/{data}
Starts the HPAC simulator
**request params:**
*`id` -- The id of HPAC to emulate, usually `1`
*`data` -- The name of the data file. Currently, this must be set to `hpac_75B.json`
**response**: 204
**curl example**: `curl -X POST http://hpac-em.gemini:6310/start/1/hpac_75B.json`
#### POST /stop/{id}
Stops the HPAC simulator
**request params:**
*`id` -- The id of HPAC to stop
**response**: 204
**curl example**: `curl -X POST http://hpac-em.gemini:6310/stop/1`
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## Noise Sources
To improve the realism several noise sources have been emedded within the application.
1.**Gaussian noise**
Supply a standard deviation for this source. The noise component is centered at zero.
2.**White noise**
Supply a minimum and a maximum for this souce. The noise is not necessarily centered at zero.
3.**Sawtooth noise**
This is supposed to prod values to go out of range --- *i.e.* drifting either high or low --- and then bring them back under control after a time. This noise source, also may be asynchronously reset, if the allow_reset flag is `true` (it is `false` by default). Only linear drift is specified at this time. The user specifies the drift as a partial derivative, in units of value/time. The time is interpretated by the program as kiloseconds and derivatives may be positive or negative. The user also specifies a reset criterion that, after the noise exceeds this criterion, it will be reset to zero.
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For more information on licensing and pricing options please contact us at:
