Integrated design: Electric lawn mower Essay

INTRODUCTION Quality moldiness be part of the anatomy of a product not slightlything that has to be found from an inspection d bingle after the design. Quality loadeds conform to the requirements and desires of the customer. The focus of spirit is to identify the customer requirements and to translate this into design constraints. QFD also takes into account what are the limits of ironware design based on existing or available resource or technology. All these requirements must be satisfied in order to produce a quality design.STATEMENT OF THE PROBLEMThe purpose of this document is to apply the Quality bunk Deployment (QFD) into the planning stage of a lawn mower design. This document seeks to answer the acknowledgment lead requirements of a lawn mower. The end result is the design concept of how to pass the lawn mower extension lead based on customer requirements and ironware constraints. DESIGN Identification of Requirements Using the data provided, the following cust omer and hardware requirements are generated. The design will then focus on firm these requirements.The customer requirements are the following Electric Lawn Mower Powered galvanizing energy instead of combustible fuel such as gasoline. inconsistent Length Flexible Lead Since the size of the ho implementhold that will use the electric lawn mower is variable, there is no definite fixed distance of the malleable lead. The hardware constraints The use of extension lead would render the to cut across the lack of duration fixed mower lead the suppressor and domain breaker will not work efficiently, ca exploitation the disruption of exponent to the mower. Design Analysis The initial main requirement of the design is to make water an electric lawn mower.One of the main obstacles of the design is the variable continuance bendible lead. The hardware requirement of inefficiency in the suppressor and earth breaker when using extension lead makes the extension lead not an option a nymore. This leads into cardinal possible solutions. 1. Use of the longest possible customer length requirement, to get together all needs. 2. Use of re-chargeable bombing to remove the constraints of the need for variable length flexible lead to power the electric lawn mower. The length can be fixed just enough for charging the batteries.Analyzing the first requirement, to satisfy all the length requirements of flexible lead using the longest possible lead requirement seems to be the most cost effective solution. The problem is, this would also mean that the lawn mower will have to carry the free weight added by the elongated flexible lead. And to satisfy all requirements, this means that the flexible lead had to be considerable long. Considering the current requirements of a lawn mower, the flexible lead had to be comparatively larger than average home extension wires. Just imagine how a lot weight this would produce.Therefore as a designer, this is not a favorable option. Analyzing the second requirement, which is now the remaining solution, we should be able to contrast the banish effects with the negative effects of the first solution. This whence boils down to the weight issue. The lawn mower requires a considerable amount of power to run, therefore the battery has to be able to sustain sufficient operating time. The most workable battery would still be the lead-acid, otherwise it would be very effective, one standard automotive battery would surely not be enough. looking at at the power requirements, this should be calculated in detail based on the power requirements of the lawn mower. Since the power requirement of the lawn mower is not that available at this level of conceptual design, we can make some estimate. Assuming the lawn mower consumes 3000 Watts of power, more than double for the average vacuum cleaner. both hours of lawn mower physical process is probably sufficient for as long as it can be recharge. At 12 V Lead-Acid battery, a nd 2 two-hours of operation would required the following ampere-hour requirements.Japanese standard car batteries could deliver up to 150*Ah, thus we can calculate the number of batteries So we need roughly four batteries. The weight of four batteries is still acceptable therefore this is a better solution compared to having the longest possible flexible lead. proof The final solution presented based on QFD analysis of customer requirements yielded with a battery packed electric lawn mower. The battery is able to solve the flex lead requirement by just fixing the length to a relatively short distance enough for re-charging.