Vending machine Problem Statement Problem 1 • The vendor needs to put a lot of effort to stop the cart and also it takes a lot of energy to start it again. • We can also see that Start and Stopping requires more energy as it is the process of acceleration and deceleration. • Solving this problem will make the system efficient and make it easy to handle for the vendors. Product Specification • When ever there is a need to stop the cart, user can pull a lever and the vending cart will stop within a range of 3-5 m. • And the all kinetic energy will be stored as spring potential energy. • And after pulling the second lever cart will move using the stored energy. Product Specification • Load Carrying capacity• We want to build a brake system which is able to stop a cart which is loaded upto 500kg. • Brake time• Why to target it• A typical vendor wants to stop a cart as soon as somebody calls them. For example within a few second • What is our target• We want our 500 kg vending cart to stop with 5 sec of apply a brake. • Brake Distance• Why to target• A vendor would not be happy if the cart is stopping after travelling 10-20 meters. • A high Distance will also lead to potential customer goodwill loss • What is our target• We want to stop the cart close to customer. • So we are targeting to stop the cart within 5 meters. Analysis Vending cart mass = 500 KG Stiffness of Spring = 360N/m Extension of the rack will be directly proportional to the linear distance covered by the cart. Model Boundary Conditions Considering the case where the cart is running and the brake is applied at time zero. Results Time required to stop- 4.237 Sec • Distance covered before stop- 3.646 m
