JohnMcMahonMaintenanceandReliability

Sensor systems for obstacle detection and avoidance in mobile robots. • Produce a written report documenting: the choice of sensors, sensor evaluation, the developed processor/measurement system, and overall system performance.

What does the term "tolerance" refer to when designing dynamic surfaces? A. Material durability B. The space between connected parts, designed for supported materials C. The friction and resistance between connected parts D. The dynamic surface design complexity Which of the following parameters must be considered before the design phase of a dynamic surface? Select all correct answers. A. Tolerance B. Element size C. Friction D. Minimum thickness E. Support material removal F. Positioning A dynamic surface is an array of connected surfaces that produces a mechanical effect; the movement of one surface causes predictable movement of the others. A. True B. False Which of the following are basic elements of 2D nesting? Select all correct answers. A. Part orientation B. Part combinations C. Spacing between parts D. Material selection Which of the following are benefits of proper nesting and positioning? Select all correct answers. A. Reduced material waste B. Reduced energy usage due to…

DEPARTMENT OF MECHANICAL ENGINEERINGMENG 303 PRINCIPLES OF COMPUTER AIDED ENGINEERING Failure mode and effect analysis for Autonomous underwater vehicles, based on any standard.   plese dont late

(a) A very important component of a system has a mean time between failures of 100 hr and a mean time to repair of 10 hr. Determine the inherent availability of the system.           (b) If the equipment in Q7 (c i) above is required to meet an inherent availability requirement of 0.985 and a mean time between failures of 100 hr. Calculate the permissible mean time to repair and if the system as a mean of the time intervals between corrective maintenance actions of 900 hrs and the sum of the mean corrective maintenance time intervals including supply downtime and administrative down time of 10 hrs Determine the operational availability of the system

• Characterize and evaluate the sensor performance use real data already collected or extrapolated information from the sensor datasheets. • Produce a written report documenting: the choice of sensors, sensor evaluation, the developed processor/measurement system, and overall system performance.

Based on the Ball Point Pen Factory simulation: Which of the barriers shown below is positioned correctly? Great 10 9 Difficulty of removal 3 B 2 7 6 5 す 4 3 2 1 5 small 0 0 1 2 small 3 4 5 6 7 8 9 10 Impact on cycle time and quality great Barrier 1 Barrier 2 Barrier 3 Barrier 4 Barrier 5 Legend: 1 External supply - poor quality parts 2 Worker idle and non-productive time 3 Unnecessary supply forms within factory 4 Factory lighting 5 Transparent order management

Sensor systems for obstacle detection and avoidance in mobile robots. • Design and develop a suitable processor-based Data Acquisition (DAQ) system and external hardware to interface, measure, display and store the responses from the selected sensors. • Characterize and evaluate the sensor performance use real data already collected or extrapolated information from the sensor datasheets.

With the following maintenance type, design weaknesses are redesigned to improve reliability or maintainability Select one: O a. Predictive maintenance O b. Corrective Maintenance O C. Preventive maintenance O d. Scheduled maintenance

00 T R %24 Bb R V qa du/webapps/assessment/take/launch.jsp?course_assessment_id%=_254968_1&course_id%3D 3565256_1&content id= 52826 * Question Completion Status: Attach File Browse Local Files Browse Content Collection QUESTION 2 A company needs to choose one supplier for a particular type of silicon wafer used'in the production of semiconductors. The company has three options. Supplier A sells the silicon wafers for $2.50 per wafer, independently of the number of wafers ordered. Supplier B sells the wafers for $2.40 each but does not consider an order for less than 2,000 wafers. Supplier C sells the wafers for $2.30 each but does not accept an order for less than 3,000 wafers. Assume an order setup cost of $100 and an annual requirement of 20,000 wafers. Assume a 20% annual interest rate for holding cost calculations. a. Which supplier should be chosen to minimize the total annual cost for the wafers, and what is the optimal order quantity? b. If the replenishment lead time for wafers…

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How system reliability is difference from individual component reliability?   Answer in your own words. I will rate accordingly. I need correct answer.

Sensor systems for obstacle detection and avoidance in mobile robots. • Design and develop a suitable processor-based Data Acquisition (DAQ) system and external hardware to interface, measure, display and store the responses from the selected sensors.

The rapid progress of engineering design and information technology has caused difficulties in analyzing system reliability. Because of the increased complexity in system reliability structure (component/subsystem interfaces), many unexpected failure modes could occur, and their behaviors are interdependent. At a system’s design and development stage, the main challenge in analyzing a complex system is the failure uncertainty introduced by the incomplete knowledge of the system. This makes it hard to decompose system reliability into subsystem/component reliability in a deterministic manner, such as series or parallel systems. As a result, some common reliability analysis tools such as fault tree (FT) and reliability block diagram (RBD) become inadequate. Do you agree, why or why not? Are there any other approaches to system reliability assessment beside these tools at the early system’s design and development stage (what are these approaches)?

Basic Manufacturing Process with 2 Job Types + Inspection Time between job arrivals at a machining station is exponentially distributed with mean 4.4 minutes. There are 2 types of jobs to be processed 30% of which is Type 1 and, 70% are of Type 2. Processing times are exponentially distributed. Mean processing time for Type 1 is 4.8 minutes, for Type 2 it is 2.5 minutes. After the job is processed, they go through an inspection process with one single inspector and an inspection time with triangular distribution (1,2,3.5). Inspector decides whether the part is good enough, scrap or should be reworked. 80% of the parts produced is good, 10 % is scrap and the rest needs rework. Rework is done by the same manufacturing machine. The priority among the parts will be Part1 first, part2 second and reworks of both type comes later. Rework time is normally distributed with mean 2 minutes and 0,2 std dev. Simulate the system for one 8-hour day.

S 3: Light gates may be used to measure the speed of projectiles, such as arrows shot from a bow. English longbows made of yew in the 1400s achieved launch speeds of 60 m/s. Determine the relationship between light gates and the accuracy required for sensing the times when the light gate senses the presence of the arrow.

The activities, duration and cost under normal and crashed conditions for a network diagram are shown in the accompanying table.    1. Determine the normal duration of the project 2. Determine the normal cost of the project 3. Determine the critical path under normal conditions.

Analysis and Interpretation of vertical Ground Reaction Forces. In this study, a volunteer was asked to walk on two force platforms under two different conditions. Condition 1- Normal Walk (NW), condition 2 - walking over an obstacle (ObsW). The right limb was the one to step on platform 1 in both conditions. The force platforms were used to measure the vertical ground reaction forces on the right limb. Data was collected on Vicon (Nexus) software and the attached graphs ( mean NW/ObsW, Mean (+-)1SD NW/ObsW) were created. Analyse ,Interpret the graphs and make a conclusion of the result attached.

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