Active Vehicle Suspension with a Weighted Multitone Optimal Controller: Considerations of Energy Consumption

2018 ◽  
pp. 195-197
Author(s):  
Waldemar Rączka ◽  
Marek Sibielak ◽  
Jarosław Konieczny
Keyword(s):  
Energy Consumption ◽  
Optimal Controller ◽  
Vehicle Suspension

Reducing the energy consumption of space heating in buildings: design of an optimal controller

2008 ◽  
Vol 41 (2) ◽  
pp. 11098-11105
Author(s):  
Yoann Raffenel ◽  
Eric Blanco ◽  
Joseph Virgone ◽  
Philippe Neveux ◽  
Gerard Scorletti ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Optimal Controller ◽  
Space Heating

H-Infinity Controlled Actuators in Automotive Active Suspension System

2008 ◽  
Author(s):  
Alesˇ Kruczek ◽  
Antoni´n Strˇi´brsky´ ◽  
Katerˇina Hyniova´ ◽  
Martin Hlinovsky´
Keyword(s):  
Energy Consumption ◽  
Energy Distribution ◽  
Real Time ◽  
Electric Motor ◽  
Active Suspension ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Specific Situation ◽  
Energy Control ◽  
H Infinity

In this paper active suspension with linear electric motor has been designed. The active suspension is often hardly rejected for its big energy consumption. This contribution deals with direct real-time energy control in suspension system. The linear electric motor is used as an actuator. This motor can in specific situation generate the energy for next use. The H-infinity controller has been developed to improve car behavior, in particular passenger comfort and car stability. The second objective of the controller is to control energy distribution. Our submission is mainly focused on vehicle suspension, but it can be generalized to any kind of active suspension.

scholarly journals Energy Consumption of an Active Vehicle Suspension with an Optimal Controller in the Presence of Sinusoidal Excitations

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Jarosław Konieczny ◽  
Waldemar Rączka ◽  
Marek Sibielak ◽  
Janusz Kowal
Keyword(s):  
Energy Consumption ◽  
Ride Comfort ◽  
Vibration Reduction ◽  
Control Signal ◽  
Driving Safety ◽  
Optimal Controller ◽  
External Energy ◽  
Vehicle Suspensions ◽  
Weighting Matrix ◽  
Energy Limitation

Control of vibration is a significant problem in the design and construction of vehicle suspensions. The usage of controlled suspensions is important due to ride comfort, driving safety, and vehicle road holding. The control law for such systems is usually determined as a solution of an optimisation problem with a quality indicator. The effectiveness of vibration reduction is possible to be improved in the entire useful frequency range of a system operation, but usually increasing external energy consumption is observed. An additional problem in the case of vehicle suspensions includes the necessity for increased vibration reduction at selected frequencies. This is related to the natural frequencies of the driver’s internal organs or to other reasons. The goal of this work is to find a compromise between efficiency of the suspension in terms of the aforementioned indicators and energy consumption in the presence of sinusoidal excitations. This paper presents a synthesis of a weighted multitone optimal controller (WMOC) for an active vibration reduction system. Energy limitation is taken into account by selection coefficients of the weighting matrix associated with the control signal vector. The control signal in this case is determined on the basis of the parameter estimation of the sinusoidal disturbances vector (PESDV). The vibration transmissibility function and the energetic indicators for the active suspension were determined while taking note of nonlinearities occurring in the actual vehicle. The analysis of energy indicators is presented, depending on the level of vibration reduction efficiency. The results were compared with referencing to LQR control strategy.

Hybrid controller design and simulation for a small-size autonomous helicopter

2016 ◽  
Vol 4 (2) ◽  
pp. 129-140 ◽  
Author(s):  
Nugroho Gesang
Keyword(s):  
Energy Consumption ◽  
Sliding Mode ◽  
External Disturbance ◽  
Mathematic Model ◽  
Optimal Controller ◽  
Sliding Mode Controller ◽  
Content Type ◽  
Hybrid Controller ◽  
Controller Performance ◽  
Autonomous Helicopter

Purpose – During flight, a small-size autonomous helicopter will suffer external disturbance that is wind gust. Moreover, the small-size helicopter can carries limited payload or battery. Therefore control system of an autonomous helicopter should be able to eliminate external disturbance and optimize energy consumption. The purpose of this paper is to propose a hybrid controller structure to control a small-size autonomous helicopter capable to eliminate external disturbance and optimize energy consumption. The proposed control strategy comprise of two components, a linear component to stabilize the nominal linear system and a discontinuous component to guarantee the robustness. An integral control is included in the system to eliminate steady state error and tracking reference input. Design/methodology/approach – This research started with derived mathematic model of the small-size helicopter that will be controlled. Based on the obtained mathematic model, then design of a hybrid controller to control the autonomous helicopter. The hybrid controller was designed based on optimal controller and sliding mode controller. The optimal controller as main controller is used to stabilize the nominal linear system and a discontinuous component based on sliding mode controller to guarantee the robustness. Findings – Performance of the proposed controller was tested in simulation. The hybrid controller performance was compared with optimal controller performance. The hybrid controller has better performance compared with optimal controller. Results of the simulation shows that the proposed controller has good performance and robust against external disturbances. The proposed controller has better performance in rise time, settling time and overshoot compared with optimal controller response both for step input response and tracking capability. Originality/value – Hybrid controller to control small-size helicopter has not reported yet. In this research new hybrid controller structure for a small size autonomous helicopter was proposed.

A nonlinear robust optimal controller for an active transfemoral prosthesis: An estimator-based state-dependent Riccati equation approach

2020 ◽  
pp. 095965182095988
Author(s):  
Anna Bavarsad ◽  
Ahmad Fakharian ◽  
Mohammad Bagher Menhaj
Keyword(s):  
Energy Consumption ◽  
Riccati Equation ◽  
Sliding Mode ◽  
Parametric Uncertainty ◽  
Tracking Performance ◽  
Control Technique ◽  
Optimal Controller ◽  
State Variables ◽  
State Dependent ◽  
Nonlinear Robust

This article presents an estimator-based nonlinear robust optimal controller for an active prosthetic leg for transfemoral amputees. The proposed controller is derived from a combination of the state-dependent Riccati equation technique to optimize the energy consumption of the robot/prosthesis system and the sliding mode control to reduce the effects of the model parametric uncertainties and ground reaction forces as nonparametric uncertainties. In addition, the integral state control technique is employed to improve tracking; also, to have a compromise between tracking performance and control signal chattering, the boundary layer is then used. In this study, the performance of both the controller and estimator in the presence of noise and disturbance is assessed for nominal system while ±40% parametric uncertainty with respect to saturation bounds of control signals is considered. The results of the simulation in this research with ±40% parametric uncertainty compared to a robust adaptive impedance control approach with the only variation of ±30% on the system parameters, show high performance of the proposed controllers in reducing energy consumption, good robustness, improved position tracking performance, and good performance in estimating state variables, even in the presence of large initial errors compared to the extended Kalman filter.

Lay Perceptions of Energy Consumption

2009 ◽  
Author(s):  
Shahzeen Z. Attari ◽  
Michael L. DeKay ◽  
Cliff I. Davidson ◽  
Wandi Bruine de Bruin
Keyword(s):  
Energy Consumption ◽  
Lay Perceptions
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