Design of a Reconfigurable Dynamic Testbed for Co-Design Method Validation

2017 ◽  
Author(s):  
Anand P. Deshmukh ◽  
Danny J. Lohan ◽  
James T. Allison
Keyword(s):  
Control System ◽  
Design Method ◽  
Design Methods ◽  
System Architectures ◽  
Car Suspension ◽  
Kinematic Behavior ◽  
Wide Range ◽  
Physical Testing ◽  
Dynamic Testbed ◽  
And Control

Physical testing as a technique for validation of engineering design methods can be a valuable source of insights not available through simulation alone. Physical testing also helps to ensure that design methods are suitable for design problems with a practical level of detail, and can reveal issues related to interactions not captured by physics-based computer models. Construction of physical and testing of physical prototypes, however, is costly and time consuming so it is not often used when investigating new design methods for complex systems. This gap is addressed through an innovative testbed presented here that can be reconfigured to achieve a range of different prototype design properties, including kinematic behavior and different control system architectures. Thus, a single testbed can be used for validation of numerous design geometries and control system architectures. The testbed presented here is a mechanically and electronically reconfigurable quarter-car suspension testbed with nonlinear elements that is capable of testing a wide range of both optimal and sub-optimal design prototypes using a single piece of equipment. Kinematic suspension properties can be changed in an automated way to reflect different suspension linkage designs, spring and damper properties can be adjusted in real time, and control system design can be changed easily through streamlined software modifications. While the specific case study is focused on development of a reconfigurable system for validation of co-design methods, the concept extends to physical validation using reconfigurable systems for other classes of design methods.

The Design of the Cable Parameters Acquisition and Control System Based on ZigBee Technology

2013 ◽  
Vol 816-817 ◽  
pp. 339-342
Author(s):  
Jun Li ◽  
Hui Yang ◽  
Hai Ma Yang ◽  
Heng Qing Hu ◽  
Xiang Fei Yu
Keyword(s):  
Control System ◽  
Data Collection ◽  
Design Method ◽  
High Reliability ◽  
Measurement And Control System ◽  
Zigbee Technology ◽  
And Control ◽  
Hardware Circuit ◽  
Measurement And Control ◽  
The Coordinator

Based on the problem of complex wiring, low anti-interference capacity and high cost in wired measurement and control system, we developed and designed a cable parameters acquisition and control system based on ZigBee technology. The system was composed of upper PC, a coordinator node and five data collection nodes, presents the hardware circuit and software design method of the coordinator node based on CC2530, and developed the PC management software based on LabVIEW. By the measurement that five data collection nodes are distributed in the indoor, the actual results show that the system is stable, and high reliability.

A Negative Impedance Approach to the Design Synthesis and Control of Multi-Energy Active Elements

2005 ◽  
Author(s):  
Thomas J. Connolly
Keyword(s):  
Control System ◽  
Synthesis Method ◽  
Design Tool ◽  
Electric Motors ◽  
Active Device ◽  
Design Synthesis ◽  
System Architectures ◽  
Active Devices ◽  
Synthesis Procedure ◽  
And Control

This paper covers the continuing development and experimental validation of our approach to the design synthesis and control of active devices in dynamic mechanical systems. Active devices, such as electric motors and hydraulic actuators, require an external power input. An innovative feature of this synthesis approach is the use of non-physically realizable elements, i.e., elements that have negative impedances, to model the behavior of an active device. The synthesis method also features the use of bond graphs, as they facilitate modeling of multi-energy systems and devices. The procedure applies to the design or retrofit of systems for which a desired frequency response is prescribed. The overarching goal of the synthesis method is to yield options for the general framework of a controllable, stable, and parameterizable system, using simulation-based techniques. Thus the procedure yields a stable “first draft” of the active device and its control system that can be handed off to respective specialists for further refinement. Simulation results indicate that design possibilities can include purely active devices or a hybrid combination of active and passive elements. In addition, atypical control system architectures, that depart from traditional PI, PD, or PID controllers can arise from the synthesis procedure. We describe validation experiments that use electric motors and rack-and-pinion systems to achieve active control of a quarter-vehicle test article. The results will provide insight into: (1) refining the synthesis procedure to include systems that feature continuous elements, (2) partially automating the synthesis procedure to make it a more versatile design tool, and (3) practical limitations of the synthesis method.

scholarly journals Optimal Hardware and Control Co-Design Applied to an Active Car Suspension Setup

Machines ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 55
Author(s):  
Michiel Haemers ◽  
Clara-Mihaela Ionescu ◽  
Kurt Stockman ◽  
Stijn Derammelaere
Keyword(s):  
Design Optimization ◽  
Design Method ◽  
State Space Model ◽  
Optimization Method ◽  
Optimal Placement ◽  
Active Components ◽  
Controller Tuning ◽  
Tuning Parameters ◽  
Car Suspension ◽  
And Control

For complex systems, it is not easy to obtain optimal designs for the hardware architecture and control configurations. Every design aspect influences the final performance, and often the interactions of the different components cannot be clearly determined in advance. In this work, a novel co-design optimization method was applied that allows the optimal placement and selection of actuators and sensors to be performed simultaneously with the determination of the control architecture and associated controller tuning parameters. This novel co-design method was applied to a state-space model of a downscaled active car suspension laboratory setup. This setup mimics a car driving over a specific road surface while active components in the suspension have to increase the driver’s comfort by counteracting unwanted vibrations. The result of this co-design optimization methodology is a Pareto front that graphically represents the trade-off between the maximum performance and the total implementation cost; the co-design results were validated with measurements of the physical active car suspension setup. The obtained controller tuning parameters are compared herein with existing controller tuning methods to demonstrate that the co-design method is able to determine optimal controller tuning parameters.

A framework for design methods, models and techniques for product and process development

2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Karen Scarlette Sanhueza ◽  
Christopher Nikulin
Keyword(s):  
Design Methodology ◽  
Process Development ◽  
Design Method ◽  
Design Methods ◽  
Content Type ◽  
Wide Range ◽  
Product And Process ◽  
Method Model ◽  
Available Resources

Purpose The purpose of this paper is to address the emerging need to map knowledge and information with a novel classification, suitable to have a clear and integrated overview of the design method, models and techniques from both the sides of product and process. The proposed classification allows to understand main relevance of different design methods, models and techniques according their characteristic and also level in where company usually applied. Design/methodology/approach The authors decided to structure the research into three steps: from the analysis of background literature, in order to draw the main evidences for the development of a novel classification, to their application. First, the papers search related to collect the different methods used in literature. Second, paper characterization which aims to understand main traits and usefulness of design methods, models and tools. Third, the assessment of design methods, models and tools according proposed classification. Findings Each method, model or technique would be more useful according to the context in which is applied. Most of methods and modes can be continuously improving, considering different sub-classification or complement each other, striving to compensate to the extent possible for weakness in any one of the approaches. Research limitations/implications The proposed classification did not deliver absolute results in every analyzed model or techniques, it delivered a wide range of possibilities in every sub-classification, thus the engineers get multiple options to choose depending on its main goal or the available resources. Originality/value The author’s proposal aims at filling a classification gap in the design method literature, which has to plausible in use. The different alternatives can be represented according to a scalable and hierarchical logic embedding also a more structured evaluation of the methods and tools in practice.

Decentralized Engine Control System Simulator

2013 ◽  
Author(s):  
John McArthur ◽  
Travis Boehm ◽  
Bobbie Hegwood ◽  
Oran Watts
Keyword(s):  
Control System ◽  
Design Method ◽  
System Development ◽  
Engine Control ◽  
Hardware In The Loop ◽  
Design Development ◽  
System Architectures ◽  
Loop Control ◽  
Communication Architecture ◽  
Engine Control System

LibertyWorks™ (Rolls-Royce North American Technologies Inc.) is developing an integrated environment for design, development, testing, and integration of current and future decentralized gas turbine engine control systems. This paper serves as a mid-project status update to solicit recommendations from industry and academia on what might be done to make it better, and to give the community a preview. Identified as the Decentralized Engine Control System Simulator (DECSS), this system has the capabilities to support flexible, decentralized control system architectures containing both simulated and physical hardware-in-the-loop control components. Neither the DECSS nor the project developing the DECSS will make a selection of a preferred control system architecture/design method, nor a preferred communication architecture/protocol, but instead will provide a flexible environment for future users to rapidly evaluate potential solutions in a real-time environment with hardware in the loop. This paper describes the DECSS functions, capabilities, organization and how it will be used as a NASA asset for future engine control system development.

A design framework for absorption and diffusion panels with sustainable materials

2021 ◽  
Vol 263 (4) ◽  
pp. 2207-2218
Author(s):  
Jonathan Dessi-Olive ◽  
Timothy Hsu
Keyword(s):  
Material Selection ◽  
Design Method ◽  
Computational Design ◽  
Digital Fabrication ◽  
Design Methods ◽  
Acoustic Properties ◽  
Visual Appearance ◽  
Sustainable Material ◽  
Architectural Acoustics ◽  
Wide Range

Architectural acoustics has not traditionally had unified design methods that specify acoustical performance, visual appearance, and sustainable material selection, leading to underperforming products that contribute to a waste stream of petro-chemical foam and fiberglass materials. The evolution of design, materials, and manufacturing techniques in recent years has created new opportunities to reimagine acoustic diffusers and absorbers. Previous work by the authors have demonstrated a unifying framework for design and collaboration in architectural acoustics. The framework uses visually-driven computational design method inspired by shape grammars that generate a wide range of acoustic phase grating diffuser arrays that display unique visual and performative qualities. Simulation and evaluation metrics to assess the complexity of each design are rated in terms of their diffusion and absorption coefficients and a visual aesthetic coefficient. This paper extends the framework to include digital fabrication protocols and sustainable material specifications - including the use of fungi-based materials. Built prototypes demonstrate an expanded acoustic design space that gives acousticians the potential to create custom diffuser shapes with precise acoustical response. The innovative combination of computational design methods and sustainable fabrication protocols will be discussed, and the acoustic properties of arrays will be evaluated and compared to simulations of corresponding designs.

Simultaneously Satisfying Multi-Objective Design of Structural and Control Systems Based on Consideration of Uncertainty by Set-Based Approach

2018 ◽  
Author(s):  
Haruo Ishikawa ◽  
Naoko Sasaki
Keyword(s):  
Control System ◽  
Control Systems ◽  
Optimum Design ◽  
Design Method ◽  
Low Cost ◽  
Influence Factors ◽  
Mathematical Optimization ◽  
Design Stage ◽  
Set Based Design ◽  
And Control

The simultaneous optimum design for structural and control systems is very important to realize better performance, short lead time and low cost in the development of product. Previous researches on the simultaneous optimum design of these systems are mainly based on mathematical optimization or coupled computation by CAE which are based on point-based iterative calculation. On the other hand, it is general and essential that the required performances and the influence factors for them have some kinds of uncertainty especially in the initial design stage of structural design and uncertainty arising from the difference of real structural (mechanical) and mathematical models in the control system. In this research, for the expression of uncertainty, we use set-based method rather than point-based for processing these uncertainties. Also, generally, the design of the system has often multi-performances, whether structural system or control system. Then, how effective the set-based design method is to solve the simultaneous design problem is investigated, using simple examples of classical control and modern control. As a result, it is found that the applicability of the set-based design method is shown.

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