Linkage and Cam Design with MechDev Based on Non-Uniform Rational B-Splines

Müller, Mathis M.; Hüsing, Mathias; Beckermann, Agnes; Corves, Burkhard

doi:10.3390/machines8010005

Cited by 7 publications

(5 citation statements)

References 10 publications

(24 reference statements)

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“…Generally, classical linkages are combined with modern servo drives and control systems to implement such a rise-to-dwell motion. Thereby, often one-dimensional mechanisms are used to realize those motions, e.g., in [9]. On the one hand, these mechanisms have various advantages, e.g., in terms of motion accuracy, mechanical limitation of the working space, or synchronous motion [10].…”

Section: Methodsmentioning

confidence: 99%

Combining the Advantages of Different Processing Solutions Using a Novel Motion Processing Approach

et al. 2021

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In processing machines, technological tasks are implemented using suitable processing solutions. Those processing solutions can in turn have very different characteristics and specific advantages and disadvantages, e.g., concerning sensitivity to changing operating speed. In state-of-the-art processing machine controls, executing one single processing solution is supported. The execution of various processing solutions together and the combination of their advantages is currently not supported at all. In this article, a motion control approach is discussed that allows combining seemingly incompatible process solutions for a given technological task into a hybrid process solution, using the example of processing machines. The objective of this approach is to increase the achievable process window of the machine in terms of operating speed. It is shown that combining different process solutions can merge their advantages and compensate for their disadvantages. The article brings together the lessons learned from previous work in a new application to exploit advantages and compensate for disadvantages.

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Section: Methodsmentioning

confidence: 99%

Combining the Advantages of Different Processing Solutions Using a Novel Motion Processing Approach

et al. 2021

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“…For instance, the follower motion can be described by a variety of functions depending on the amount of design parameters involved and the function complexity: cycloid, modified harmonic, trapezoidal, modified trapezoidal, polynomial, spline, Bézier, harmonic, etc. [29,[31][32][33][34][35]. In practice, the profile shown in Figure 2 is one of the most commonly used in industry, namely, a dwell (s 1 )-drop (s 2 )-dwell (s 3 )-rise (s 4 ) motion.…”

Section: Piece-wise Polynomial Follower Lawmentioning

confidence: 99%

An Integrated Co-Design Optimization Toolchain Applied to a Conjugate Cam-Follower Drivetrain System

et al. 2023

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Due to ever increasing performance requirements, model-based optimization and control strategies are increasingly being adopted by machine builders and automotive companies. However, this demands an increase in modelling effort and a growing knowledge of optimization techniques, as a sufficient level of detail is required in order to evaluate certain performance characteristics. Modelling tools such as MATLAB Simscape have been created to reduce this modelling effort, allowing for greater model complexity and fidelity. Unfortunately, this tool cannot be used with high-performance gradient-based optimization algorithms due to obfuscation of the underlying model equations. In this work, an optimization toolchain is presented that efficiently interfaces with MATLAB Simscape to reduce user effort and the necessary skill and computation time required for the optimization of high-fidelity drivetrain models. The toolchain is illustrated on an industrially relevant conjugate cam-follower system, which is modelled in the Simscape environment and validated with respect to a higher-fidelity modeling technique, namely, the finite element method (FEM).

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“…The design process requires taking the equivalent stiffnesses of the front and rear brake systems into account since the difference between the displacements of the swingarm's two sides strongly affects the roller's balancing position on the cam surface. The cam synthesis procedure has been explored during the last years [7][8][9]. However, because the stiffnesses of the brake systems are highly nonlinear in nature, the relationship between the input force and the BFD ratio by the VCBS is quite complicated.…”

Section: The Mechanism Of Vcbsmentioning

confidence: 99%

A Design Method for a Variable Combined Brake System for Motorcycles Applying the Adaptive Control Method

et al. 2021

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The variable combined brake system (VCBS) is a mechanism for motorcycles to simultaneously activate the front and rear brake systems by using one brake lever or pedal. The purpose is to reduce the risk of rollover accidents due to misuse of the front brake when panic braking. Due to its ability in a wide variation range of braking force distribution (BFD) ratios between the front and rear wheels, the VCBS can simultaneously achieve high braking effort and driving comfort performances, provided that the BFD ratio is designed appropriately. This paper aimed to develop the design method for the VCBS. A mathematical model of the VCBS mechanism is derived, and a parameter matching design method that applies adaptive control theory is proposed. A prototype of VCBS is designed and built based on the proposed method. The straight-line braking test results show that the motorcycle equipped with the VCBS prototype effectively obtained a high braking performance in deceleration. The obtained maximum deceleration is an average of 6.37 m/s2 (0.65 g) under an average handbrake lever force of 154.29 N. For front brake failure, maximum deceleration is obtained at an average of 3.38 m/s2 (0.34 g), which is higher than the homologation requirement of 2.9 m/s2.

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Linkage and Cam Design with MechDev Based on Non-Uniform Rational B-Splines

Cited by 7 publications

References 10 publications

Combining the Advantages of Different Processing Solutions Using a Novel Motion Processing Approach

Combining the Advantages of Different Processing Solutions Using a Novel Motion Processing Approach

An Integrated Co-Design Optimization Toolchain Applied to a Conjugate Cam-Follower Drivetrain System

A Design Method for a Variable Combined Brake System for Motorcycles Applying the Adaptive Control Method

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