A Modular Control Lab Equipment and Virtual Simulations for Engineering Education
Vanessa Young, et. al | Kennesaw State University Department of Mechanical Engineering
Abstract: Hands-on experiences in engineering education are highly valued by students. However, the high cost, large size, and non-portable nature of commercially available laboratory equipment often confine these experiences to lab courses, separating practical demonstrations from classroom teaching. Consequently, mechanical engineering students may experience a delay in practical engagement as lab sessions typically follow theoretical courses in subsequent semesters, a sequence that differs from mechatronics, electrical, and computer engineering programs. This study details the design and development of portable and cost-effective control lab equipment that enables in-class demonstrations of a proportional-integral-derivative (PID) controller for the trajectory and speed control of a DC motor using MATLAB Simulink, as well as disturbance control. The equipment, composed of a DC motor, beam, gears, crank, a mass, and propellers, introduces disturbances using either propellers or a rotating unbalanced mass. All parts of the equipment are 3D printed from polylactic acid (PLA). Furthermore, the beam holding the propellers can be attached to Quanser Qube lab equipment, which is widely used in control laboratories. The lab equipment we present is adaptable for demonstrations, classroom projects, or as an integral part of lab activities in various engineering disciplines.
The iconic American “street food” traces its origin to 19th century German immigrants who brought frankfurters from their homeland.
In the 1860s, the term “hot dog” emerged in reference to these sausages being sold in buns at street carts. The popularity of hot dogs soared during the late 19th and early 20th centuries particularly at baseball games where the hot dog is virtually synonymous.at the sport.
In many college towns push cart hot dog vendors may be welcomed and even embraced as part of the local food scene. They can add variety and convenience for students, faculty, and staff by offering affordable and quick meal options. These towns may have regulations and policies in place to support and accommodate such vendors.
The case against hot dogs as a food primarily revolves around health concerns and potential risks associated with their consumption. Some of the key arguments include:
Processed meat and additives: Hot dogs are often made from processed meats that can contain additives, preservatives, and high levels of sodium. These additives, such as nitrates and nitrites, have been linked to increased risks of certain health issues, including cancer and heart disease.
High in unhealthy fats: Hot dogs are typically high in saturated and trans fats, which can contribute to elevated cholesterol levels and increase the risk of cardiovascular diseases.
Potential for contamination: There have been instances of foodborne illnesses associated with hot dogs, such as outbreaks of bacterial contamination, including E. coli or Listeria monocytogenes. Improper handling, storage, or undercooking can increase the risk of such contamination.
Allergens and dietary restrictions: Hot dogs often contain common allergens like wheat, soy, and dairy. Additionally, they may not be suitable for individuals with dietary restrictions or preferences, such as vegetarians, vegans, or those following specific religious or cultural dietary guidelines.
Environmental impact: The production and consumption of hot dogs contribute to environmental concerns. The meat industry, including processed meat production, is associated with greenhouse gas emissions, land degradation, and water pollution.
These arguments against hot dogs do not necessarily apply to all hot dogs or to every individual. Moderation, choosing healthier options, and considering individual dietary needs and preferences can help mitigate some of the concerns associated with hot dog consumption.
Relevant codes, standards and regulations:
Food Safety and Inspection Service: Federal Meat Inspection Act
U.S. Department of Agriculture: Hot Dogs and Food Safety
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Meatloaf can be traced back to ancient times when people started combining ground meat with other ingredients for a more economical and substantial meal.
Colonial America: The concept of mixing ground meat with breadcrumbs or grains dates back to medieval Europe. When settlers arrived in North America, they adapted these techniques to the ingredients available to them, such as native grains and game meats.
19th Century: As meat grinders became more widely available in the 19th century, the preparation of ground meat dishes became easier. Meatloaf gained popularity during this time, with regional variations emerging across the United States. Families would incorporate various seasonings, herbs, and fillers based on local ingredients and preferences.
World War II and Post-War Era: Meatloaf became even more popular during World War II and the post-war era due to its affordability and versatility. Families could stretch a small amount of meat by combining it with breadcrumbs, rice, or oats, making it an economical choice during times of rationing.
1950s and 1960s: Meatloaf reached its peak of popularity in the mid-20th century, becoming a staple of American home cooking. The dish was often featured in cookbooks and advertisements, showcasing its versatility and ease of preparation.
Over time, meatloaf recipes have evolved with regional and personal preferences. Some variations include using different meats (beef, pork, veal, or a combination), adding vegetables, experimenting with various seasonings, and glazing with sauces.
Ingredients:
Celery, chopped fine, 1 & 1/2 oz.
Yellow onions, chopped fine, 2 & 3/4 oz.
Ground beef, 2 lbs.
Eggs, 2 whole
Ketchup, 2 & 1/3 Tbsp.
Mustard, 2 3/8 tsp.
Worcestershire sauce, 1 1/8 tsp.
Italian seasoning, 5/8 tsp.
Bread crumbs, plain, 3 & 1/2 oz.
Kosher salt, 3/8 tsp.
Black pepper, 1/4 tsp.
Topping
Ketchup, 1 & 1/2 oz.
Water, 2 3/8 tsp.
Instructions
Preheat oven to 325 degrees.
Place ground beef in mixing bowl. Add eggs and combine.
Add ketchup (2 & 1/3 Tbsp.), mustard, Worcestershire sauce, Italian seasoning, onions, celery, breadcrumbs, salt, and pepper. Mix well to combine. Meatloaf should be firm. If mixture is not, add more bread crumbs.
Place meatloaf in a loaf pan. Make sure it is spread evenly.
Bake for about 45 minutes, uncovered. Remove from oven.
Combine ketchup (1 & 1/2 oz.) and water. Spread over meatloaf.
Return to oven for another 15-20 minutes, or until internal temperature reaches 155 degrees.
Let the meatloaf rest for 30 minutes prior to cutting.
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