Rome
Navigation Innovations Inc. 27 Old
County Rd. H. James
Rome, President 978-281-5623
WHAT
WE POSITION
(SOME
OF ) WHAT WE USE
Typical Ways We Use It
Rome Navigation Innovations specializes in solutions to issues associated with enhancing the
Accuracy, Reliability
,
Availability and Fault tolerance
of systems involving
positioning, tracking,
and navigation
Products:
·
Canned
, User Friendly
programs to implement data integration, and properly position “Position
Tagged
Data”. That is software
fusing various data sources to achieve the objectives of
the system.
·
Canned
Programs (
or documented routine inserts) for
Data Analysis of position tagged data.
·
Feasibility
studies, Assistance in hardware choices for implementation, Technical
support
for running programs and interpreting results.
Cognate
Activities:
·
Developing
algorithms For the effective processing of data tagged with position
information
·
Change,
Fault
detection (inherent in measured position tagged data) in position or
time
·
Error,
Analysis
of measured ( position tagged)
data, and in positioning
·
Development
of
noise rejection filters/smoothers
for measured( position tagged)
data
·
Assistance in choosing/modifying
hardware in building a positioning
system meeting the requirements of
customer's objective in the unique environment where the system must
operate.
·
Assistance
in
evaluating system component
·
Data
heath
studies: Seek out signs of synchronization problems, data
inconsistencies
Recent Work:
For
Amtrak:
It is now using " "Robust Positioning
For Track
Geometry Data" algorithms
in their data stream before entering track geometry data into their
data bases.
There is then:
Near perfect
data alignment of the track geometry data from test to test.
Geodetic positioning is highly accurate, nearly always available.
The Algorithm
is nearly impervious to the many faults and outages of GPS, and
milepost
marking that might have occurred. It uses geometry data signal matching
for
alignment, and a distance based Kalman filter incorporating GPS and
other
available inputs for required robustness. See
this
link for further details
For the
FRA:
"Wrong Track Detection
Algorithm" with extremely low error rates (consistent with
"safety of
life"). It uses raw differential GPS, heading rate, and available
track maps, in a a multi-input Bayes Decision function. A
Distance
based Kaman filter supports the algorithm. It was designed and
verified using track geometry alignment algorithms.
Demonstrated 0
"misses" of a track change in approximately ~ 24 million
records; and 2 False alarms
"Safety/Risk Analysis of Track
Survey Strategies" . Based on Markov state probability analysis
, developed canned programs to compare the saftey/risks associated with
various survey strategies applied to tack and rail measurement. Inputs
included spacing between surveys, remediation time, probabilities of
missing a fault , probability of an accident in one day given a fault,
fault generation rate. Outputs included expected accidents/year and
probability that a fault will be remediated before it creates an
accident. Parameters can be dependent on time of creation of the fault
For
Georgetown Rail: Developed a rail
specific Kalman
Smoother capable of extrapolating linear position on a rail tie defect
detection Hi-Rail system to within ~2 ft even in intervals
of
GPS outage for up to and sometimes greater than
1 mile.
It is configured to allow multiple strategies for “Return to Defect”.
The
filter integrates 6" ( nominal ) accuracy differential GPS ,
Train
odometer, and rate gyro. In the process , Rome assisted in the
ferreting
out synchronization issues, and choosing cost effective effective
odometer and heading reference.
For The
Volpe Transportation Systems Center:
Developed a Kalman Filter to predict the motions of wake vortices
created by
landing aircraft ( a possible threat to following aircraft). It
integrates
lidar measurement of vortex peak positions , vortex strength, and
wind,
with the equations of motion of vortices as they are effected by each
other,
and the ground beneath.
Experience , Resume of H. James Rome