TRIZ has been developed over six decades and attracted a great deal of interest in industry and education. It can provide a systematic approach to analyze problems where innovation is needed and to provide strategies and methods to solve the problem. It consists of many tools such as 40 inventive principles and the matrix of contradictions, laws of technical system evolution, substance-field analysis, ARIZ (algorithm of inventive problems solving). In this paper, we focused on engineering innovative education and developed a TRIZ-based systematic method applied to inspire individual student’s interest and learning motivation based on their life experience and capability. The process of this method includes analysis of individual student’s interest and expertise, requirement analysis, confirmation of problem direction, problem definition, selection of TRIZ tools, generation of solutions, evaluation of solutions. A case study including an integrated application with mechanical, electrical and information techniques was illustrated for the method and process. The authors expects this research could provide a reference for engineering innovation education and the method proposed in this paper is general in form to be applied for the other disciplines.
This article presents a systematic approach to developing a quadruped walking machine with a single degree-of-freedom(DOF) and with statically stable locomotion. An existing path generator, based on design requirements and constraints, is selected and synthesized into a leg mechanism with a suitable foot path. The crank of the leg is then driven by a two-speed control apparatus to shift the moving speed of the foot point both in support phase and transfer phase. This variable speed control of the crank increases the value of duty factor and improves the stability of locomotion. A prototype walking machine with 8-link type legs is constructed and proved that this approach is feasible for designing various types of single-DOF legged vehicles.
According to the documents, an ancient Chinese carpenter named Lu Ban invented a four-legged wooden horse carriage in the Chou Dynasty in ancient China, around 480 B.C. This wooden horse carriage could simulate the walking gait of a horse very well but it needed a carriage to keep balance while walking. This paper proposes a method of stability analysis model for the locomotion of a quadruped wooden horse without the support of a carriage. First of all, four most unstable conditions are constructed based on the gait theory of the quadruped wooden horse. The stability areas are obtained by taking the intersections of supporting boundaries that are constructed under various unstable conditions for walking on even and uneven terrain. These results of the stability analysis model are useful for supervising the stability of locomotion of a quadruped.
This paper makes test of degree of polymerization and molecular weight of common and inflaming retarding viscose in clothing material. And then it analyzes the effect of degree of polymerization and molecular weight on material fiber thermology and mechanical property. The research shows that the addition of fire retardant reduces degree of polymerization and molecular weight of material fiber, enhances flame retardant performance, and reduces mechanical property. Through the test research, we deeply compare the performance of inflaming retarding and common viscose on clothing material, which offers related reference value for the development of inflaming retarding function garment materials.
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