Instantaneous Optimal Control with Acceleration and Velocity Feedback

1991 ◽  
pp. 287-306 ◽  
Author(s):  
J. N. Yang ◽  
Z. Li ◽  
S. C. Liu
Keyword(s):  
Optimal Control ◽  
Velocity Feedback ◽  
Instantaneous Optimal Control

Multipoint instantaneous optimal control of structures

2002 ◽  
Vol 80 (11) ◽  
pp. 909-917 ◽  
Author(s):  
S.S. Akhiev ◽  
U. Aldemir ◽  
M. Bakioglu
Keyword(s):  
Optimal Control ◽  
Instantaneous Optimal Control

scholarly journals Absolute Instantaneous Optimal Control Performance Index for Active Vibration Control of Structures under Seismic Excitation

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Arcan Yanik
Keyword(s):  
Optimal Control ◽  
Performance Index ◽  
Energy Demand ◽  
Control Method ◽  
Seismic Excitation ◽  
Numerical Verification ◽  
Control Performance ◽  
Linear Quadratic ◽  
Near Fault ◽  
Instantaneous Optimal Control

In this paper, an instantaneous optimal control performance index for active control of structures under seismic excitation is analytically proposed. Absolute velocity and absolute displacement terms are implemented to the conventional state vector terms and eventually to the resulting performance index expression. The seismic response reduction effectiveness of the proposed performance index is compared with the linear quadratic regulator control (LQR). For numerical verification of the performance index, an eight-story shear building with a fully active tendon controller system under unidirectional earthquake is considered as the first example. For a more complex model, a three-dimensional tier building under the effect of bidirectional earthquakes is selected as second numerical example. Unidirectional near fault and bidirectional near fault earthquakes are used in the simulations. The control energy demand of each control method is also considered in the comparison. It is obtained from numerical simulations that the proposed performance index is as effective as LQR in attenuating structural vibrations. However, the resulting performance index does not require a priori knowledge of the seismic excitation like the LQR. The nonlinear Riccati matrix equation solution of the LQR is not required in the proposed performance index as well.

The Instantaneous Optimal Control Strategy of Parallel Hybrid Loader

2013 ◽  
Vol 380-384 ◽  
pp. 467-471
Author(s):  
Xiao Hua Zeng ◽  
Ge Bai ◽  
Jin Xin Wang ◽  
Zhen Ping Zhou
Keyword(s):  
Optimal Control ◽  
Fuel Consumption ◽  
Control Strategy ◽  
Optimal Allocation ◽  
Electric Energy ◽  
Target Function ◽  
Optimal Control Strategy ◽  
Motor Torque ◽  
Parallel Hybrid ◽  
Instantaneous Optimal Control

In this paper, the instantaneous optimal control strategy of parallel hybrid loader is presented. The aim is to achieve the real time optimal allocation of internal combustion engine (ICE) torque and motor torque in any driving cycle for loader. Thus, all combinations of the ICE torque and the motor torque is determined in any demand torque. Then integrated instantaneous fuel consumption (IIFC) is calculated as a target function, by establishing the equivalent relationship between the electric energy consumption of battery and the fuel consumption, which is converted to the electric energy. When the minimum integrated instantaneous fuel consumption is found, the instantaneous optimal allocation of ICE torque and the motor torque is achieved. Finally in order to verify the functionality of the control strategy, the vehicle and the control algorithm co-simulation model is built on AMESim and Matlab/Simulink platforms. The simulation results show that the strategy is able to improve the fuel economy by more than 10% while ensuring the vehicle power performance.

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