Comparison between Different Modelling Methods of Secondary Path to Maximize Control Effect for Active Engine Mounts

2021 ◽  
Author(s):  
Ziwei Zhou ◽  
Rong Guo ◽  
Shuheng Xu
Keyword(s):  
Control Effect ◽  
Engine Mounts ◽  
Active Engine ◽  
Modelling Methods

Miniaturised structure design, modelling and simulation process for active engine mounts

2021 ◽  
Vol 16 (1) ◽  
pp. 66
Author(s):  
Pu Wang ◽  
Rang Lin Fan ◽  
Zeng Yao Xing ◽  
Wei Cun Zhang ◽  
Quan Fa Wu
Keyword(s):  
Structure Design ◽  
Modelling And Simulation ◽  
Engine Mounts ◽  
Simulation Process ◽  
Active Engine

Miniaturised structure design, modelling and simulation process for active engine mounts

2021 ◽  
Vol 16 (1) ◽  
pp. 66
Author(s):  
Wei Cun Zhang ◽  
Quan Fa Wu ◽  
Zeng Yao Xing ◽  
Rang Lin Fan ◽  
Pu Wang
Keyword(s):  
Structure Design ◽  
Modelling And Simulation ◽  
Engine Mounts ◽  
Simulation Process ◽  
Active Engine

Combination of map-based and adaptive feedforward control algorithms for active engine mounts

2016 ◽  
Vol 23 (19) ◽  
pp. 3092-3107 ◽  
Author(s):  
F Hausberg ◽  
M Plöchl ◽  
M Rupp ◽  
P Pfeffer ◽  
S Hecker
Keyword(s):  
Adaptive Filters ◽  
Feedforward Control ◽  
Parallel Implementation ◽  
Control Strategies ◽  
Multiple Input Multiple Output ◽  
Convergence Time ◽  
Engine Mounts ◽  
Active Engine ◽  
Tracking Behavior ◽  
Adaptive Feedforward

Active engine mounts significantly contribute to ensure the comfort in vehicles with emission-reducing engine technologies, e.g., cylinder-on-demand (COD), downsizing or turbochargers. To control active engine mounts, either adaptive or non-adaptive feedforward control is commonly employed. Since both approaches have previously been treated separately, this study proposes methods to connect them in terms of multiple-input-multiple-output Newton/FxLMS adaptive filters with self-trained, grid-based look-up tables. The look-up tables are incorporated as parameter-maps or parallel-maps, respectively. By combining the two feedforward control strategies, their inherent advantages, i.e., the adaptivity of adaptive filtering and the direct impact as well as the tracking behavior of map-based feedforward control, are utilized. The proposed control structures are illustrated by simulation and experimentally demonstrated in a vehicle with a V8-COD engine. While both methods significantly reduce the convergence time of the adaptive filter, the parallel implementation additionally improves the tracking behavior during fast engine run-ups.

Non-Linear Modeling and Parameter Identification of Semi-Active Engine Mounts With Air Spring

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Rong Guo ◽  
Zi-wei Zhou
Keyword(s):  
Dynamic Characteristics ◽  
Dynamic Stiffness ◽  
Superior Performance ◽  
Test Rig ◽  
Air Spring ◽  
Engine Mounts ◽  
Air Chamber ◽  
Non Linear ◽  
Engine Mount ◽  
Active Engine

Abstract Car manufacturers have been motivated to apply semi-active engine mounts to ensure superior performance in vibration attenuation during idle condition and better ability to isolate vibration which is generated by engine unbalanced force at high frequencies. This paper develops a non-linear lumped parameter model of semi-active engine mounts with air spring that focuses on the non-linearity of the rubber diaphragm and the air chamber. Then, the main rubber dynamic stiffness parameters are identified through experimental approaches with a novel-designed test rig. Other parameters including effective pumping area, main rubber spring bulge stiffness, fluid channel inertia and resistance, rubber diaphragm, and air-chamber parameters are attained through finite element analysis (FEA). Supported by the identified lumped parameters, the non-linear mathematical model could be simulated. In addition, the dynamic characteristics of the semi-active engine mount are tested through the original test rig. Therefore, comparing with the tested dynamic characteristics, the simulation result can validate the developed model and thus facilitate the structure design of the semi-active engine mount.

Hydraulically Amplified Magnetostrictive Actuator for Active Engine Mounts

2008 ◽  
Author(s):  
Suryarghya Chakrabarti ◽  
Marcelo J. Dapino
Keyword(s):  
Electromagnetic Actuator ◽  
Frequency Bandwidth ◽  
Force Response ◽  
Frequency Range ◽  
Electromagnetic Actuators ◽  
Engine Mounts ◽  
Displacement Response ◽  
Magnetostrictive Actuator ◽  
Active Engine

A bidirectional magnetostrictive actuator with millimeter stroke and a blocked force of ± 22 N has been developed based on a simple hydraulic magnification mechanism. The purpose of the actuator is to replace the electromagnetic actuator in active engine mounts. The Terfenol-D actuator has a flat free displacement response up to 200 Hz and a flat blocked force response over a frequency range of at least 10 to 500 Hz. The actuator promises to deliver a much broader frequency bandwidth than commercial electromagnetic actuators.

Modeling of a Displacement Amplified Magnetostrictive Actuator for Active Mounts

2009 ◽  
Author(s):  
Suryarghya Chakrabarti ◽  
Marcelo J. Dapino
Keyword(s):  
Friction Model ◽  
Radial Dependence ◽  
Engine Mounts ◽  
Lubricated Contacts ◽  
Lugre Friction Model ◽  
Harmonic Content ◽  
Magnetostrictive Actuator ◽  
Lugre Friction ◽  
Active Engine ◽  
Elastomeric Seals

A hydraulically-amplified Terfenol-D actuator is developed to be used as a driver in active engine mounts. A measure of the actuator’s performance is obtained through electromechanical tests in mechanically-blocked and mechanically-free conditions. A nonlinear model for the actuator is presented. The Jiles-Atherton model is coupled with Maxwell’s equations in order to quantify the radial dependence of magnetization and associated dynamic losses. Magnetostriction, which is modeled as a single-valued function of magnetization, provides an input to the mechanical model describing the system vibrations. Friction at the elastomeric seals is modeled using the LuGre friction model for lubricated contacts. Results show that the model is able to accurately describe the dynamic behavior of the actuator up to 400 Hz. An order analysis on the data and modeled responses show that the model is capable of describing the higher harmonic content of the device with sufficient accuracy for control design.

Development of an Electromagnetic Active Engine Mount

2015 ◽  
Author(s):  
Nader Vahdati ◽  
Somayeh Heidari
Keyword(s):  
Automotive Application ◽  
Electromagnetic Actuator ◽  
Functional Capability ◽  
Engine Mounts ◽  
Transmitted Force ◽  
Bond Graph Modeling ◽  
Engine Mount ◽  
Design Requirements ◽  
Active Engine ◽  
The Voice

Engine mounts need to satisfy three design requirements: (1) firmly support engine weight, (2) isolate structure from the engine’s noise and vibration, and (3) control engine motion when large shocks or engine resonances are present. In addition to these three criteria, which are common for designing all types of engine mounts (passive, semi-active, and active), two more design requirements need to be satisfied for active engine mounts. First, they should be designed such that if there is any malfunction with the actuator, the controller, or the sensors, the active engine mount should still safely operate as a passive mount. Second, the power consumption, the size and weight of the required actuator and its controller should be kept as low as possible. The current paper aims to present an active hydraulic (or fluid) engine mount design by using an electromagnetic actuator and capacitive circuit such that it is able to act as a passive mount, semi-active mount, and an active mount. In addition, the presented design has the capability to be converted to a damper as and when needed. The multi-functional capability of the proposed engine mount design (passive, semi-active, active, and damper) distinguishes the current design from the previously designed active engine mounting systems, and this multi-functional capability is explained in the paper. The proposed design consists of a conventional passive hydraulic (fluid) mount, an electromagnetic actuator (voice coil) and a capacitive circuit. The voice coil is placed in the lower chamber of the passive hydraulic mount and it can change the volumetric stiffness of the bottom chamber actively such that the engine mount has low dynamic stiffness in a wide range of frequencies. The capacitive circuit is paralleled with the voice coil and in situations when large shock inputs are present; it adds capacitance to the electromagnetic circuit and changes the characteristics of the mount from an isolator to a damper. Since the active engine mount design of this paper involves several energy domains, bond graph modeling technique is used for mathematical modeling. MATLAB simulation results are shown for an automotive application and the performance of the proposed active engine mount design is evaluated as an isolator and as a damper. Finally, an adaptive controller, based on Filtered-X LMS algorithm, is proposed and its performance is investigated. The proposed design can eliminate transmitted force from the engine to the structure in a frequency range of 15 Hz to 125 Hz.

Multi-input multi-output control of an automotive active engine mounting system

2011 ◽  
Vol 225 (11) ◽  
pp. 1492-1504 ◽  
Author(s):  
A J Hillis
Keyword(s):  
Steady State ◽  
Diesel Engine ◽  
Adaptive Filter ◽  
Electromagnetic Actuator ◽  
Mean Square ◽  
Least Mean Square ◽  
Active System ◽  
Output Control ◽  
Engine Mounts ◽  
Active Engine

This paper describes the control of automotive active engine mounts, consisting of a conventional passive hydraulic mount and an internal electromagnetic actuator. The actuator generates a force dependent on a control signal from an algorithm implemented in real time. The filtered- x least-mean-square (FXLMS) adaptive filter is applied to a system of two active mounts fitted to a saloon car equipped with a four-cylinder turbo-diesel engine. The steady state and transient performance of the active system is experimentally evaluated, and is found to typically reduce chassis vibration by 50 per cent to 90 per cent under normal driving conditions.

scholarly journals A Review on Model and Control of Electromagnetic Active Engine Mounts

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Henghai Zhang ◽  
Wenku Shi ◽  
Jun Ke ◽  
Guoyu Feng ◽  
Junlong Qu ◽  
...  
Keyword(s):  
Control Strategies ◽  
Element Model ◽  
Academic Community ◽  
The Body ◽  
Current Status ◽  
Experimental Modelling ◽  
Engine Mounts ◽  
Developmental Progress ◽  
Active Engine ◽  
And Control

The isolation of the body from engine vibration is the most challenging and disruptive vibrational problem. Active engine mounts (AEMs), especially electromagnetic AEMs, achieve a significant performance improvement in decreasing the wide frequency band vibration. Increasing research interest is necessary to provide the academic community with a guideline for electromagnetic AEMs. Therefore, the current review aims to comprehensively supplement the review of AEMs. The key reviews of electromagnetic AEMs focus on (1) general considerations of electromagnetic AEMs, (2) models, and (3) control strategies. This paper presents a review of the current status and developmental progress of AEMs. A theoretical model, a finite-element model, and the identification (or experimental modelling) of electromagnetic AEMs during the last 2 decades are then studied. Finally, control strategies, such as classical control, adaptive control, and two degree of freedom (2DOF) control, are discussed and compared. The main purpose of this paper is to meet the needs of researchers and engineers engaged in electromagnetic AEM analysis and control.

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