Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781118881279
Author: Richard S. Figliola, Donald E. Beasley
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 12, Problem 12.14P
In Example 12.2, integration is identified as a method for reducing the effects of noise in a signal. Discuss how a moving average can be used to reduce the effects of noise in a velocity measurement through the integration of an acceleration signal. Discuss the effects of averaging time on the elimination of noise. Assume that the noise has significant amplitude but has higher-frequency content than the velocity being measured.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The "spring-like effect" in a golf club could be determined by measuring the coeffi cient of restitution (the ratio of the outbound velocity to the
inbound velocity of a golf ball fired at the clubhead). Twelve randomly selected drivers produced by two clubmakers are tested and the
coefficient of restitution measured. The data follow:
Club 1: 0.8406, 0.8104, 0.8234, 0.8198, 0.8235, 0.8562, 0.8123, 0.7976, 0.8184, 0.8265, 0.7773, 0.7871
Club 2: 0.8305, 0.7905, 0.8352, 0.8380, 0.8145, 0.8465, 0.8244, 0.8014, 0.8309, 0.8405, 0.8256, 0.8476
Test the hypothesis that both brands of ball have equal mean overall distance. Use a = 0.05 and assume equal variances. Answer the following
questions regarding the t-test.
1. How many degrees-of-freedom are there in this problem (needed for finding the critical t-
values).
2. What is the absolute values of the critical t-value for this problem? We are using a two-
tailed t-test with a significance level of 5%. (use four significant figures)
3. What is…
A displacement transducer has the following specifications:
Linearity error: ±0.25% reading
Drift: ±0.05%/°C reading
Sensitivity error: ±0.25% reading
Excitation: 10-25 V dc
Output: 0-5Vdc
Range: 0-5 cm
The transducer output is to be indicated on a voltmeter having a stated accuracy of 0:1% reading with a resolution of 10 μV. The system is to be used at room temperature, which can vary by 10 °C. Assume 95% confidence.
The displacement transducer above is used in measuring the displacement of a body impacted by a mass. Twenty measurements are made, which yield
Determine a best estimate for the mass displacement at 95% probability based on all available information.
A displacement transducer has the following specifications:
Linearity error: ±0.25% reading
Drift: ±0.05%/°C reading
Sensitivity error: ±0.25% reading
Excitation: 10-25 V dc
Output: 0-5Vdc
Range: 0-5 cm
The transducer output is to be indicated on a voltmeter having a stated accuracy of 0:1% reading with a resolution of 10 μV. The system is to be used at room temperature, which can vary by 10 °C. Assume 95% confidence.
The displacement transducer above is used in measuring the displacement of a body impacted by a mass. Twenty measurements are made, which yield
X= 17.20mm
Sx= 1.70mm
Determine a best estimate for the mass displacement at 95% probability based on all available information.
Chapter 12 Solutions
Theory and Design for Mechanical Measurements
Ch. 12 - Prob. 12.11PCh. 12 - Determine the bandwidth for a seismic instrument...Ch. 12 - In Example 12.2, integration is identified as a...Ch. 12 - Consider a moving coil transducer having a coil...Ch. 12 - Hydrophones are microphones designed to be used...Ch. 12 - Research the use of load cells in robotics, both...Ch. 12 - Prob. 12.22PCh. 12 - Prob. 12.25PCh. 12 - Prob. 12.26PCh. 12 - Prob. 12.27P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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.arrow_forwardThe potentiometer was initially invented to measure linear displacement of moving objects. Decades later, engineers invented LVDT to do the same task. What is the main advantage of LVDT over conventional potentiometer? Paragraph V B I Lato (Recom... く 19px... KYarrow_forwardA displacement transducer has the following specifications: Linearity error:±0.25% reading Drift:±0.05%/°C reading Sensitivity error: ±0.25% reading Excitation: 10-25 V Output: dc 0-5Vdc Range: 0-5 cm The transducer output is to be indicated on a voltme- ter having a stated accuracy of 0:1% reading with a resolution of 10 μV. The system is to be used at room temperature, which can vary by 10 °C. Estimate an uncertainty in a nominal displacement of 2 cm at the design stage. Assume 95% confidence.arrow_forward
- Discuss the importance of measuring devices for Electric Motor and Internal Combustion Engine in terms of accuracy.arrow_forward6. A ball is thrown straight up in the air at time t = 0. Its height y(t) is given by y(t) = vot - 791² (1) Calculate: (a) The time at which the ball hits the ground. First, make an estimate using a scaling analysis (the inputs are g and vo and the output is the time of landing. Think about their units and how you might construct the output using the inputs, just by matching units). Solve the problem exactly. Verify that the scaling analysis gives you (almost) the correct answer. (b) The times at which the ball reaches the height v/(4g). Use the quadratic formula. (c) The times at which the ball reaches the height v/(2g). You should find that both solutions are identical. What does this indicate physically? (d) The times at which the ball reaches the height v/g. What is the physical interpretation of your solutions? (e) Does your scaling analysis provide any insight into the answers for questions (a-e)? Discuss. (Hint: Observe how your answers depend on g and vo).arrow_forward1. A process manufacturing missile component parts is being controlled, with the performance characteristic being the tensile strength in pounds per square inch. Samples of size 4 each are taken every hour and 30 samples are reported as below: 30 30 30 45219.84, Σ-1Τι = 321.6, Σ i= 1$i = 110.5 (a) Find trial control limits for X and R charts. (b) Repeat part (a) for X and S charts.arrow_forward
- A hotel chain based in the United States contracts with a European vacuum cleaner manufacturer to supply a large number of upright cleaner units. After delivery, the hotel raises questions about manufacturer vacuum cleaner performance claims, pointing out that the units should have been tested to meet ASTM 558, an American standard. The manufacturer notes the advertised performance is based on IEC 60312, a European standard, and the two test codes will yield similar, if not exact, results. Investigate both test codes and address similarities and differences. Is there a legitimate claim here?arrow_forwardThe actual value of pressure differential for flow across a venturimeter is 60 mm WC. The measured values using a pressure sensor are; Confidence level 95% mm WC 59.8,59.2,59.7,60.2,60.3,60.1,60.5 Estimate Bias uncertainty (1) Precision uncertainty (2) Total uncertainty (3)arrow_forwardA special sensor is designed to sense the percent vapor present in a liquid vapor mixture. If during a static calibration the sensor indicates 80 units when in contact with 100% liquid,0 units with 100% vapor ,and 40units with a 50:50% mixture,determine the static sensitivity of the sensorarrow_forward
- n a certain dynamic measurement application the input(x) – output(y) relationship is given by y=1+(1+x)e^(-x) With what uncertainty must x be determined to yield a relative uncertainty of ±5 percent for y at a value of x = 2,4arrow_forwardWhat is an example of experimental uncertainty?arrow_forward%ov li. N A نقطة واحدة The thermometer requires one minute to indicate 90% of the response curve. Assuming the first- order system response as shown below. If the thermometer is placed in the bath, what is its time constant * ?in seconds c(t) = K(1 – e-t/) %3| 23 O 26 29 32 نقطة واحدة The first-order system has a unit- ramp response as shown below. what is the transfer function of the * ?system c(t) = t – 10 + 10 e-0.1t 10/(s+1) O 1/(s+10) O E IIarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license