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Published byArchibald Fletcher Modified over 9 years ago
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KAITLIN PERANSKI: IE, PROJECT MANAGER JEREMY BERKE: EE, SCRIBE/LEAD SOFTWARE CHRIS CAPORALE: EE, LEAD HARDWARE SPENCER WASILEWSKI: ME, MODELING/MACHINIST KYLE JENSEN: ME, NST MODULE EXPERT KYLE LASHER: ME, TEST BENCH DESIGNER P14372 Actively Stabilized Hand-Held Laser Pointer
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Agenda Background System Analysis Concept Development Detailed Risk Assessment Project Schedule Test Plan Challenges Action Items
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PROBLEM STATEMENT STAKEHOLDERS CUSTOMER NEEDS ENGINEERING REQUIREMENTS HOUSE OF QUALITY BENCHMARKING RESULTS CURRENT PROJECT SCHEDULE Background
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Problem Statement Current State: Module from NST that can steer a laser beam Lacks the ability to detect and reduce unwanted vibrations Future State: System to sense and interpret vibrations Output to NST Module for corrective action Goals: Handheld, self-contained and safe design Constraints: Operating temperature, package size
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Stakeholders New Scale Technologies, Victor, NY Dave Henderson, Owner Daniele Piazza, R&D RIT & MSD MSD Group
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Needs and Requirements Customer Needs Engineering Requirements
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House of Quality Top Concerns: 1.Amp Reduction 2.Response Time 3.NST Laser Steering
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Benchmarking Results Comparison of Gyroscopes and Accelerometers Gyroscope: output given in rad/sec; measures roll, yaw and pitch; possible vendor- InvenSense IDG- 1000 Accelerometer: cannot sense yaw directly; requires more computation Target Frequency Range: 1-20 Hz Round 1 testing confirmed range
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Frequency Range Testing
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Arm Extended, Unfiltered Arm Extended, Filtered
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Test Bench Ideas Requirements: Frequency: 1-20 Hz Amplitude: +/- 2 degrees
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Patent Results US 7553048 B2 Uses a gimbal (13) and magnet (80)
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Patent Results US 7380722 B2 Uses 2 accelerometers and a mirror
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Patent Results US 8436908 B2 Uses a stabilizer and actuators
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Patent Results US 20130077945 A1 Uses 3 actuators and a gyroscope
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Current Project Schedule
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FUNCTIONAL DECOMPOSITION SYSTEM ARCHITECTURE System Analysis
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Functional Decomposition
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System Architecture
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MORPHOLOGICAL ANALYSIS CONCEPT ALTERNATIVES PUGH MATRIX CONCEPT SELECTION SYSTEM ARCHITECTURE Concept Development
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Morphological Analysis
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The driving decision currently is digital versus analog.
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Concept 1 Concept 2 Battery Gyroscope Analog LPF Hardware Integrator Hardware Servo Mode NST Module Battery Gyroscope Analog LPF Hardware Integrator Software Digital USB NST Module Concept Alternatives
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Concept 3 Concept 4 Battery Gyroscope Digital LPF Software Integrator Software Digital USB NST Module Battery Accelerometer Digital LPF Software Integrator Software Digital USB NST Module Concept Alternatives
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Concept Selection: Pugh Matrix 1 st Iteration
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Concept Selection: Pugh Matrix 2 nd Iteration
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System Architecture Battery Gyroscope Low Pass FilterIntegrator Scaled Inversion Servo/USB (I 2 C)
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Detailed Risk Assessment Top Concerns: 1.Battery failure 2.Poor sensor accuracy 3.Poor data processing 4.Send wrong control signal to NST module
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Project Schedule: Next 3 Weeks
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Test Plan Gyroscope Accuracy, output scaling Filter Design Transfer function Integrator Design Accuracy, response time, noise Test bench Functionality, calibrate frequency Algorithm Vibration reduction capacity
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Challenges Control system design Response time, accuracy Reached out to NST for input on analog versus digital Still waiting for a response
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Action Items Update NST on progress Refine test bench design 1 versus 2 axis Future Benchmarking Feedback system/loop: analog circuit in some binocular systems Components: gyroscope, battery, processor
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Any Questions? Thank You.
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References Benchmarking Articles: Measurement Method for Image Stabilizing Systems by Golik and Wueller Image Stabilization Technology Overview by Sachs, Nasiri and Goehl
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