Ricardo Gear Shift Quality Assessment (GSQA)Ricardo GSQA systems are utilised by 120 users globally and are continually being developed, as they have been for the past 20 years.

Creating a world fit for the future

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Ricardo have a complete suite of Gear Shift Quality hardware and software tools for transmission analysis and development. From basic synchroniser design software through to complete shift system and driveline modelling and gear shift durability test rig software, the GSQA Manual system is one part of this suite. The GSQA system transforms gearshift quality measurement from traditional subjective rating assessment to objective measure characterisation.

Hardware Package• Signal conditioning rack• Strain-gauged gear knob• Potentiometer assembly• Pole mount system• Manual trigger switch• GPS navigation receiver

Acquisition Software• Gearshift Data Acquisition Software

(GDAS) - Channel setup and gear axis alignment - Guided data capture - Automatic shift recognition - Duty cycle capture

Analysis Software• Objective Gearshift Analysis Software

(OGAS) - Native GDAS data import - User verification and review of data - Generation of objective shift quality measures and charts

Simple Hardware SetupBase hardware allows fast and easy measurement of almost any manual vehicle. Add-on modules for larger commercial vehicle/off-highway cabins. Range/splitter and signal box functionalities for heavy-duty vehicles. Clutch module add-on for static clutch analysis also available.

Clear Menu Driven GUISet up analogue and CAN data acquisition channels, teaching and aligning gear positions to a common axis - allowing accurate data comparison across vehicle platforms - easily with simple interfaces. No detailed software or coding knowledge is required.

Static and Dynamic DataCapture representative data for all modes of operation;• Static (detent) • Dynamic (synchroniser) • Crossgate (detent and biases)• H-Gate (limits of gate travel)• Clutch (hysteresis)Using GPS integration, the location of shifts and duty cycles can be logged. Shift recording is triggered by force applied to the gear lever and the software automatically recognises the shift type.Once in acquisition mode the driver can shift freely and the GDAS software will save the appropriate data automatically without further user input.

Diverse Analysis and OutputsOGAS software provides scope for user to verify all data and ensure conformity to test specifications. Objective measure outputs and comparison plots allow rapid and straightforward data analysis. Outputs can be used for competitor benchmarking, end-of-line production quality conformity, development progress analysis, problem root cause analysis and more.

GSQA Manual comprises the following;

GDAS Acquisition

Clutch Loops

Shift Loops

Integral Plots

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For further information or to discuss your business needs, please contact:

Email: shiftquality.sales@ricardo.comWeb: www.ricardo.com - search for GSQA

Creating a world fit for the future

Acquisition – Gearshift Data Acquisition Software (GDAS)The Ricardo GSQA data acquisition system has been developed using the proprietary software MATLAB for execution on Windows PC. The menu-driven GUI ensures that no knowledge of this is needed to operate the GSQA system to acquire and analyse data. The main analogue signals are; - 3x Gear knob forces (X,Y,Z) - 3x Gear knob travel (X,Y,Z) - 2x Speed (transmission input / output) - 2x Temperature (ambient / transmission oil)Additional analogue or digital signals can be added for additional relevant data for analysis. Acquisition rate can be set between 100 Hz and 25 kHz.

Analysis – Objective Gearshift Analysis Software (OGAS)The OGAS package has been designed to function specifically with GDAS but will import and analyse data from text files, GSQA AUDIT, Test Rig and Dynamic Modelling software. OGAS imports the acquired data, allowing user verification, data analysis and generation of gearshift quality objective measures.

The main features of OGAS are;H-Gate Plots Mapping the shift pattern in the shift plane (X/Y travel). Shift plane data is plotted against colour contours of applied force and identifies in-gear voids, limits and compliance.H-Dot and H-Loci Enables visualisation of the static and dynamic shifts in the shift plane. ‘H-Dot’ highlights shifts start and end points and ‘H-Loci’ shows the path taken for each shift.Cross-Gate Cross-gate plotting is based on left-right sweeps across the neutral plane. The analysis defines the physical dimensions, the bias loads/unloads, compliance and stiffness of the cross-gate.Mean Shift Forces For each shift type the force vs travel data is averaged allowing comparison between static and dynamic shifts. System variation, shift forces and confidence bands are interpreted from this data.Duty Cycle Using GPS this allows the user to study the time and percentage in each gear, and plot relevant informationMeasures These offer objective metrics by which to categorise and specify shift effort, shift definition, shift feel and more. Examples of the 50 metrics included are below; Synchronisation impulse, maximum sync force, mean sync force, maximum 2nd load force, maximum effort in X/Y/Z, total shift travel, double bump/sync force ratio, time blocking release integral, free flight time, blocking release time, lubricant temperature, total shift work, total sync power

Technical Specification• Integrated analogue to digital conversion• USB connection to PC - 480Mbits/s• Up to 25kHz acquisition rate, allowing NVH/sound

measurements• Analogue signal acquisition - 16 channels (2 channels per card) 3x FE-366-TA analogue force cards 2x FE-356-OA displacement cards 1x FE-386-TC temperature card 1x FE-396-FV speed frequency to voltage card 1x FE-376-IP NVH/soundcard• CAN acquisition - 32 channels• USB GPS Navigation Receiver - NMEA 0183 Protocol• Waterproof Flight Case - 800(L) x 400(W) x 250(D)

Software:• Supplied as two separate tools; GDAS and OGAS• Available as a MATLAB (2014b or above recommended) or

compiled version (no MATLAB license required)• 50 metrics provided, new metrics can be created by user• Ongoing user support available

GSQ

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Manual

H-Gate Plot

H-Loci Contours

Cross-Gate Plot

Mean Shift Forces

Duty Cycle

Measures: Bar Plots

Measures: Scatter Plots