Probabilistic behaviour of joints on joint forces in mechanisms
| Autor: | Marko Kegl, Boštjan Harl, Nenad Gubeljak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Kinematic chain
kinematički lanac matematičko programiranje spojne sile stohastički model Engineering Stochastic modelling Monte Carlo method joint forces Kinematics matematično programiranje symbols.namesake Control theory kinematične verige Taylor series stohastično modeliranje Joint (geology) Simulation stochastic model business.industry kinematic chain mathematical programming General Engineering Probabilistic logic Mechanism (engineering) symbols business udc:620.172.2 |
| Zdroj: | Tehnički vjesnik Volume 22 Issue 1 Tehnički vjesnik, vol. 22, no. 1, pp. 113-117, 2015. |
| ISSN: | 1848-6339 1330-3651 |
| Popis: | U radu se razmatra utjecaj zračnosti u spojevima na reakcijske sile spoja u mehanizmima. Pomoću matematičkog programiranja, uspješno se mogu dobiti optimalni parametri kinematičkih lanaca primjenom determinističkog pristupa. Međutim, situacija postaje složenija ako se moraju uzeti u obzir slučajni učinci tolerancije dužine poluge (kraka) i slučajni položaji svornjaka. U ovom se radu utjecaj zračnosti na spojne sile izračunao pomoću Taylor aproksimacije i Monte Carlo metode. Implementacija modela ilustrirana je na dva primjera. Prvi primjer razmatra lanac zatvorene petlje, predstavljajući mehanizam s četiri šipke kao sastavnog dijela hidrauličkog nosača, korištenog u rudarstvu. Drugi primjer razmatra reaktivne sile spoja u mehanizmu automobilskog brisača. This paper discusses the influence of the clearance in joints on the joint reaction forces in mechanisms. By using mathematical programming, the optimal parameters of kinematic chains can be efficiently obtained by using the deterministic approach. However, the situation becomes more sophisticated if random effects of tolerances of the arm lengths and the random pin positions have to be considered. In this work the influence of clearances on joint forces is calculated by using the Taylor approximation and the Monte Carlo method. The implementation of the model is illustrated with two examples. The first example considers a closed loop chain, representing a four-bar mechanism being an actual part of a hydraulic support, employed in mining industry. The second example considers joint reaction forces of car wiper mechanism. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|