| 1. |
- Kim, H.M., et al.
(författare)
-
Target cascading in vehicle redesign : A class VI truck study
- 2002
-
Ingår i: International Journal of Vehicle Design. - 0143-3369 .- 1741-5314. ; 29:3, s. 199-225
-
Tidskriftsartikel (refereegranskat)abstract
- The analytical target cascading process is applied to the redesign of a U.S. class VI truck. Necessary simulation and analysis models for predicting vehicle dynamics, powertrain, and suspension behaviour are developed. Vehicle design targets that include improved fuel economy, ride quality, driveability, and performance metrics are translated into system design specifications, and a consistent final design is obtained. Trade-offs between conflicting targets are identified. The study illustrates how the analytical target cascading process can reduce vehicle design cycle time while ensuring physical prototype matching, and how costly design iterations late in the development process can be avoided
|
|
| 2. |
- Kokkolaras, Michael, et al.
(författare)
-
Simulation-based optimal design of heavy trucks by model-based decomposition : An extensive analytical target cascading case study
- 2004
-
Ingår i: International Journal of Vehicle Design. Heavy Vehicle Design. - 1744-232X .- 1741-5152. ; 11:3-4, s. 403-433
-
Tidskriftsartikel (refereegranskat)abstract
- We present the findings of an extensive case study for the decomposed, simulation-based, optimal design of an advanced technology heavy truck by means of analytical target cascading. The use of a series hybridelectric propulsion system, in-hub motors, and variable height suspensions is considered with the intention of improving both commercial and military design attributes according to a dual-use philosophy. Emphasis is given to fuel economy, ride, and mobility characteristics. The latter are predicted by appropriately developed analytical and simulation models. This article builds on previous work and focuses on recent efforts to refine the applied methodologies and draw final conclusions.
|
|
| 3. |
- louca, L.S., et al.
(författare)
-
Analytical Target Cascading for the Design of an Advanced Technology Heavy Truck
- 2002
-
Ingår i: Proceedings of the ASME Design Engineering Division - 2002. - New York : American Society of Mechanical Engineers. - 0791836282 ; , s. 3-10
-
Konferensbidrag (refereegranskat)abstract
- Analytical target cascading (ATC) is a methodology that can be used during the early development stages of large and complex systems for propagating desirable overall product targets to appropriate individual specifications for the various subsystems and components. The ATC process is applied to the design of an advanced technology heavy truck. A series hybrid-electric propulsion system, in-hub motors, and variable height suspensions are introduced with the intent to improve both commercial and military design attributes according to a dual-use design philosophy. Emphasis is given to fuel economy, ride, and mobility characteristics. These vehicle responses are predicted by appropriately developed analytical and simulation models. This article is an extension to previous work: the engine is now included at the bottom level, several battery types are considered to study their effect on fuel economy, and a more demanding driving schedule is used to assess regenerative braking benefits and ride quality. Results are presented for target values associated with a 100% improvement on fuel economy while maintaining performance attributes relative to existing designs.
|
|
| 4. |
- Fellini, R., et al.
(författare)
-
A sensitivity-based commonality strategy for family products of mild variation, with application to automotive body structures
- 2004
-
Ingår i: Structural and multidisciplinary optimization (Print). - : Springer Science and Business Media LLC. - 1615-147X .- 1615-1488. ; 27:1-2, s. 89-96
-
Tidskriftsartikel (refereegranskat)abstract
- Identification of the product platform is a key step in designing a family of products. This article presents a methodology for selecting the product platform by using information obtained from the individual optimization of the product variants. Under the assumption that the product variety requires only mild design changes, a performance deviation vector is derived by taking into consideration individual optimal designs and sensitivities of functional requirements. Commonality decisions are based on values of the performance deviation vector, and the product family is designed optimally with respect to the chosen platform. The proposed methodology is applied to the design of a family of automotive body structures. Variants are defined by changing the functional requirements they need to satisfy and/or the geometry of the associated finite element models.
|
|
| 5. |
- Kokkolaras, Michael, et al.
(författare)
-
Extension of the target cascading formulation to the design of product families
- 2002
-
Ingår i: Structural and multidisciplinary optimization (Print). - : Springer Science and Business Media LLC. - 1615-147X .- 1615-1488. ; 24:4, s. 293-301
-
Tidskriftsartikel (refereegranskat)abstract
- The target cascading methodology for optimal product development is extended to product families with predefined platforms. The single-product formulation is modified to accommodate the presence of shared systems, subsystems, and/or components and locally introduced targets. Hierarchical optimization problems associated with each product variant are combined to formulate the product family multicriteria design problem, and common subproblems are identified based on the shared elements (i.e. the platform). The solution of the overall design problem is coordinated so that the shared elements are consistent with the performance and behaviour of the product variants. A simple automotive design example is used to demonstrate the proposed methodology.
|
|
| 6. |
- Michelena, Nestor, et al.
(författare)
-
Design of an Advanced Heavy Tactical Trucks : A Target Cascading Case Study
- 2001
-
Ingår i: International Truck and Bus Meeting and Exhibition. - Warrendale, Pa : Society of Automotive Engineers, Incorporated.
-
Konferensbidrag (refereegranskat)abstract
- The target cascading methodology is applied to the conceptual design of an advanced heavy tactical truck. Two levels are defined: an integrated truck model is represented at the top (vehicle ) level and four independent suspension arms are represented at the lower (system ) level. Necessary analysis models are developed, and design problems are formulated and solved iteratively at both levels. Hence, vehicle design variables and system specifications are determined in a consistent manner. Two different target sets and two different propulsion systems are considered. Trade-offs between conflicting targets are identified. It is demonstrated that target cascading can be useful in avoiding costly design iterations late in the product development process.
|
|
