Module: thrMomentumManagement

This module reads in the Reaction Wheel (RW) speeds, determines the net RW momentum, and then determines the amount of angular momentum that must be dumped.

A separate thruster firing logic module called thrMomentumDumping will later on compute the thruster on cycling. The module PDF Description contains further information on this module’s function, how to run it, as well as testing.

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Functions

void SelfInit_thrMomentumManagement(thrMomentumManagementConfig *configData, int64_t moduleID)

This method initializes the configData for this module. It creates a single output message of type CmdTorqueBodyIntMsg.

Return

void

Parameters

• configData: The configuration data associated with this module

void CrossInit_thrMomentumManagement(thrMomentumManagementConfig *configData, int64_t moduleID)

This method performs the second stage of initialization for this module. It links to 2 required input messages of type RWArrayConfigFswMsg and RWSpeedIntMsg.

Return

void

Parameters

• configData: The configuration data associated with this module

void Update_thrMomentumManagement(thrMomentumManagementConfig *configData, uint64_t callTime, int64_t moduleID)

The RW momentum level is assessed to determine if a momentum dumping maneuver is required. This checking only happens once after the reset function is called. To run this again afterwards, the reset function must be called again.

Return

void

Parameters

• configData: The configuration data associated with the module

• callTime: The clock time at which the function was called (nanoseconds)

void Reset_thrMomentumManagement(thrMomentumManagementConfig *configData, uint64_t callTime, int64_t moduleID)

This method performs a complete reset of the module. Local module variables that retain time varying states between function calls are reset to their default values.

Return

void

Parameters

• configData: The configuration data associated with the module

struct thrMomentumManagementConfig

#include <thrMomentumManagement.h>

Module configuration message definition.

Public Members

int initRequest

[-] status flag of the momentum dumping management

RWArrayConfigFswMsg rwConfigParams

[-] struct to store message containing RW config parameters in body B frame

double hs_min

[Nms] minimum RW cluster momentum for dumping

char deltaHOutMsgName[MAX_STAT_MSG_LENGTH]

The name of the output message.

int32_t deltaHOutMsgId

ID for the outgoing message.

char rwSpeedsInMsgName[MAX_STAT_MSG_LENGTH]

[] The name for the reaction wheel speeds message

int32_t rwSpeedsInMsgId

[] The ID for the reaction wheel speeds message

char rwConfigDataInMsgName[MAX_STAT_MSG_LENGTH]

[-] The name of the RWA configuration message

int32_t rwConfInMsgId

[-] ID for the incoming RWA configuration data

BSKLogger *bskLogger

BSK Logging.