Vibration analysis module

Files
file	vibrationanalysis.c
	Gathers data on the accels to estimate vibration.

Data Structures
struct	VibrationAnalysis_data

Macros
#define	MAX_QUEUE_SIZE   2
#define	STACK_SIZE_BYTES   (200 + 448 + 16 + (2*3*window_size)*0)
#define	TASK_PRIORITY   PIOS_THREAD_PRIO_LOW
#define	SETTINGS_THROTTLING_MS   100
#define	MAX_ACCEL_RANGE   16
#define	FLOAT_TO_FIXED   (32768/(MAX_ACCEL_RANGE*2)-1)
#define	VIBRATION_ELEMENTS_COUNT   16
#define	MAX_WINDOW_SIZE   1024
#define	USE_SINGLE_INSTANCE_BUFFERS   1

Functions
static void	VibrationAnalysisTask (void *parameters)
static void	VibrationAnalysisCleanup (void)
static int32_t	VibrationAnalysisStart (void)
static int32_t	VibrationAnalysisInitialize (void)

Variables
static struct pios_thread *	taskHandle
static TaskInfoRunningElem	task
static struct pios_queue *	queue
static bool	module_enabled = false
static struct VibrationAnalysis_data *	vtd

Detailed Description

Macro Definition Documentation

#define FLOAT_TO_FIXED   (32768/(MAX_ACCEL_RANGE*2)-1)

Definition at line 65 of file vibrationanalysis.c.

#define MAX_ACCEL_RANGE   16

Definition at line 64 of file vibrationanalysis.c.

#define MAX_QUEUE_SIZE   2

Input objects: Accels, VibrationAnalysisSettings Output object: VibrationAnalysisOutput

This module executes on a timer trigger. When the module is triggered it will update the data of VibrationAnalysiOutput, with the accumulated accelerometer samples.

Definition at line 52 of file vibrationanalysis.c.

#define MAX_WINDOW_SIZE   1024

Definition at line 68 of file vibrationanalysis.c.

#define SETTINGS_THROTTLING_MS   100

Definition at line 62 of file vibrationanalysis.c.

#define STACK_SIZE_BYTES   (200 + 448 + 16 + (2*3*window_size)*0)

Definition at line 54 of file vibrationanalysis.c.

#define TASK_PRIORITY   PIOS_THREAD_PRIO_LOW

Definition at line 61 of file vibrationanalysis.c.

#define USE_SINGLE_INSTANCE_BUFFERS   1

Definition at line 71 of file vibrationanalysis.c.

#define VIBRATION_ELEMENTS_COUNT   16

Definition at line 66 of file vibrationanalysis.c.

Function Documentation

static void VibrationAnalysisCleanup ( void  )

static

Definition at line 110 of file vibrationanalysis.c.

static int32_t VibrationAnalysisInitialize ( void  )

static

Initialise the module, called on startup

Definition at line 300 of file vibrationanalysis.c.

static int32_t VibrationAnalysisStart ( void  )

static

Start the module, called on startup

Definition at line 150 of file vibrationanalysis.c.

static void VibrationAnalysisTask ( void *  parameters )

static

Accumulate accelerometer data. This would be a great place to add a high-pass filter, in order to eliminate the DC bias from gravity. Until then, a DC bias subtraction has been added in the main loop.

Definition at line 337 of file vibrationanalysis.c.

Variable Documentation

bool module_enabled = false

static

Definition at line 80 of file vibrationanalysis.c.

struct pios_queue* queue

static

Definition at line 79 of file vibrationanalysis.c.

TaskInfoRunningElem task

static

Definition at line 78 of file vibrationanalysis.c.

struct pios_thread* taskHandle

static

Definition at line 77 of file vibrationanalysis.c.

struct VibrationAnalysis_data * vtd

static