Comparison study for double passive car suspension system through mathematical modelling and experimental work

This research work was designed to extract essential oil from sweet lime peel (solid waste). The feed material selected for study is sweet lime peel. The disposal of waste product such as peels often has a legal restriction problem and treatment process involved requires higher costs. Transformation of this waste in to useful products could cut global treatment costs. Hence the objective of our experimental work was to convert sweet lime peel in to essential oil which is in huge demand in food, pharma and cosmetic industry. In our experimental work eextraction of essential oil was evaluated and comparison study was made between steam distillation, hydro-distillation, solvent extraction and hydro-steam distillation. Maximum extraction yield of 2.4 % was achieved at 90 min of contact by hydro-distillation. Hydro-distillation method offers advantages in comparison with other three methods in terms of energy saving, cleanliness and reduced waste water. Chemical constituents of essential oil samples were evaluated in terms of qualitative and quantitative analyses by gas chromatography/mass spectrometry and physical techniques. The chemical profile includes thirty two components which were identified in the extracts by Gas chromatography-Mass spectroscopy (GC-MS) analysis. The dominant component identified was limonene (65 .2 to 72.8%).

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Optimization Technique of Passenger Car Suspension System Considering J-Turn Handling Performances

Transactions of the Korean Society of Mechanical Engineers A ◽

10.3795/ksme-a.2004.28.3.267 ◽

2004 ◽

Vol 28 (3) ◽

pp. 267-273

Keyword(s):

Optimization Technique ◽

Suspension System ◽

Passenger Car ◽

Car Suspension

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Fuzzy sliding mode based active disturbance rejection control for active suspension system

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/0954407019860626 ◽

2019 ◽

Vol 234 (2-3) ◽

pp. 449-457

Author(s):

Haoping Wang ◽

Yeqing Lu ◽

Yang Tian ◽

Nicolai Christov

Keyword(s):

Disturbance Rejection ◽

Ride Comfort ◽

Actuator Saturation ◽

Sliding Mode ◽

Suspension System ◽

Active Disturbance Rejection Control ◽

Active Disturbance Rejection ◽

Car Suspension ◽

Disturbance Rejection Control ◽

Fuzzy Sliding Mode

This article deals with the control problem of 7-degrees of freedom full-car suspension system which takes into account the spring-damper nonlinearities, unmodeled dynamics and external disturbances. The existing active disturbance rejection control uses an extended state observer to estimate the “total disturbance” and eliminate it with state error feedback. In this article, a new type of active disturbance rejection control is developed to improve the ride comfort of full car suspension systems taking into account the suspension nonlinearities and actuator saturation. The proposed controller combines active disturbance rejection control and fuzzy sliding mode control and is called Fuzzy Sliding Mode active disturbance rejection control. To validate the system mathematical model and analyze the controller performance, a virtual prototype is built in Adams. The simulation results demonstrate better performance of Fuzzy Sliding Mode active disturbance rejection control compared to the existing active disturbance rejection control.

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Adaptive fault-tolerant control for active suspension systems based on the terminal sliding mode approach

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219883304 ◽

2019 ◽

Vol 234 (2) ◽

pp. 501-511

Author(s):

Amirhossein Kazemipour ◽

Alireza B Novinzadeh

Keyword(s):

Control Strategy ◽

Control Method ◽

Fault Tolerant ◽

Sliding Mode ◽

Fault Tolerant Control ◽

Active Suspension ◽

Suspension System ◽

Terminal Sliding Mode ◽

Car Suspension ◽

Suspension Model

In this paper, a control system is designed for a vehicle active suspension system. In particular, a novel terminal sliding-mode-based fault-tolerant control strategy is presented for the control problem of a nonlinear quarter-car suspension model in the presence of model uncertainties, unknown external disturbances, and actuator failures. The adaptation algorithms are introduced to obviate the need for prior information of the bounds of faults in actuators and uncertainties in the model of the active suspension system. The finite-time convergence of the closed-loop system trajectories is proved by Lyapunov's stability theorem under the suggested control method. Finally, detailed simulations are presented to demonstrate the efficacy and implementation of the developed control strategy.

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