Optimal Slip Control of a Torque Converter Clutch

2015 ◽  
Author(s):  
Yaoying Wang ◽  
Zongxuan Sun
Keyword(s):  
Engine Speed ◽  
Control Method ◽  
Torque Converter ◽  
Time Varying ◽  
Rotational Angle ◽  
Engine Torque ◽  
Slip Control ◽  
Energy Saving Potential ◽  
Vehicle Engine ◽  
Simulation Results

Slip control of a torque converter clutch (TCC) has been developed for years but most approaches are focused on time-based methods without offering a systematic approach for dealing with the time-varying signals associated with the engine torque pulsation. As one of the major vibration sources of a vehicle, engine torque is periodic in the crankshaft rotational angle but aperiodic in time as the engine speed changes in real-time. This paper first presents a powertrain vibration analysis based on the transient engine torque input and the conventional TCC slip control. Simulation results show that the conventional time-based TCC slip control does not settle the periodic nature of the engine torque vibration with respect to crankshaft angle. However, a time-varying angle-based control method can solve this issue. The paper then proposes an optimal TCC torque trajectory by using dynamic programming for this time-varying angle-based control method. Simulation results demonstrate the energy saving potential of the optimal trajectory over the conventional method.

scholarly journals Time-Varying Impedance Control of Port Hamiltonian System with a New Energy-Storing Tank

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Min Zheng ◽  
Tangqing Yuan ◽  
Tao Huang
Keyword(s):  
Control Method ◽  
Impedance Control ◽  
Conservative System ◽  
Time Varying ◽  
Control Performance ◽  
Singularity Problem ◽  
Numerical Examples ◽  
New Energy ◽  
Simulation Results ◽  
New Framework

In order to guarantee the passivity of a kind of conservative system, the port Hamiltonian framework combined with a new energy tank is proposed in this paper. A time-varying impedance controller is designed based on this new framework. The time-varying impedance control method is an extension of conventional impedance control and overcomes the singularity problem that existed in the traditional form of energy tank. The validity of the controller designed in this paper is shown by numerical examples. The simulation results show that the proposed controller can not only eliminate the singularity problem but can also improve the control performance.

Computation of Overdrive Gear Ratio in Vehicle Gearbox With Considering Fuel Economy and Gearbox Specifications

2010 ◽  
Author(s):  
R. Ghafoori Ahangar ◽  
M. R. Meigounpoory ◽  
A. Eskandari
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Engine Speed ◽  
Rotational Velocity ◽  
Gear Ratio ◽  
Effective Parameters ◽  
Engine Operation ◽  
Engine Torque ◽  
Effective Velocity ◽  
Vehicle Engine

In this article, the gear ratio of RD (An Iranian made car by Iran Khodro Co.) vehicle gearbox with considering fuel economy and gearbox specifications is evaluated. In the first step, the gearbox advantages and its effects on the engine rotational velocity with considering road load and engine torque are investigated. It is distinguished that in a specified velocity of vehicle, engine speed in overdrive state is very lower than engine speed in fourth gear. It means that noise and fuel consumption and engine wearing and damages will be decreased. The optimized region of engine operation is identified. Using a geometric progression between automotive gear ratios and entering number of effective parameters such as specific fuel consumption, minimum mean effective velocity, and etc., overdrive gear ratio is computed. Finally the overdrive gear ratio is chosen 0.81 for vehicle.

Transient Control of a Camless Valve Actuation System Using a Time-Varying Repetitive Controller

2010 ◽  
Author(s):  
Pradeep Gillella ◽  
Zongxuan Sun
Keyword(s):  
Engine Speed ◽  
Combustion Engine ◽  
Sampling Rate ◽  
Control Design ◽  
Time Varying ◽  
Rotational Angle ◽  
Actuation System ◽  
Valve Motion ◽  
Actuation Systems ◽  
Valve Actuation

Camless valve actuation systems, also referred to as Fully Flexible Valve Actuation systems, use electronically controlled actuators to replace the camshaft in an internal combustion engine. This paper presents the control design for such an actuation system to enable the precise valve motion control during engine speed transients. The desired valve motion (reference) remains periodic in the crank angle domain, but becomes cyclic and aperiodic in the time domain when the engine speed changes in real-time. This phenomenon motivates the control design in the rotational angle domain. However, this approach results in a time-varying model for the plant. A systematic method for obtaining the discrete time-varying Input/Output representation of higher order systems is developed to enable the application of the newly developed time-varying repetitive control to plants with complex dynamics. The use of a variable sampling rate helps accurately represent complex reference signals using low dimensional models. The implementation of the simulations on a rapid control prototyping system helps identify and address potential issues that influence the controller execution time which directly affects the maximum engine speed at which it can be used.

A novel robust finite-time tracking control of uncertain robotic manipulators with disturbances

2020 ◽  
pp. 107754632098244
Author(s):  
Hamid Razmjooei ◽  
Mohammad Hossein Shafiei ◽  
Elahe Abdi ◽  
Chenguang Yang
Keyword(s):  
Finite Time ◽  
Control Method ◽  
Sliding Mode ◽  
Robotic Manipulators ◽  
Sliding Mode Controller ◽  
Time Varying ◽  
State Variables ◽  
Terminal Sliding Mode ◽  
Control Laws ◽  
Finite Time Boundedness

In this article, an innovative technique to design a robust finite-time state feedback controller for a class of uncertain robotic manipulators is proposed. This controller aims to converge the state variables of the system to a small bound around the origin in a finite time. The main innovation of this article is transforming the model of an uncertain robotic manipulator into a new time-varying form to achieve the finite-time boundedness criteria using asymptotic stability methods. First, based on prior knowledge about the upper bound of uncertainties and disturbances, an innovative finite-time sliding mode controller is designed. Then, the innovative finite-time sliding mode controller is developed for finite-time tracking of time-varying reference signals by the outputs of the system. Finally, the efficiency of the proposed control laws is illustrated for serial robotic manipulators with any number of links through numerical simulations, and it is compared with the nonsingular terminal sliding mode control method as one of the most powerful finite-time techniques.

Intelligent Information of TS Fuzzy PID Control System of BLDCM

2013 ◽  
Vol 846-847 ◽  
pp. 313-316 ◽  
Author(s):  
Xiao Yun Zhang
Keyword(s):  
Control System ◽  
Dynamic Model ◽  
Pid Control ◽  
Control Method ◽  
Design Method ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Control Precision ◽  
Simulation Results ◽  
Intelligent Information

This paper presented a new method based on the Fuzzy self - adaptive PID for BLDCM. This method overcomes some defects of the traditional PID control. Such as lower control precision and worse anti - jamming performance. It dynamic model of BLDCM was built, and then design method for TS fuzzy PID model is given, At last, it compared simulation results of PID control method with TS Fuzzy PID control method. The results show that the TS Fuzzy PID control method has more excellent dynamic antistatic performances, as well as anti-jamming performance. The experiment shows that TS fuzzy PID control has the stronger adaptability robustness and transplant.

Research on Anti-Slip Differential Control for Two-Motor Independent Driven Vehicle

2013 ◽  
Vol 330 ◽  
pp. 615-618
Author(s):  
Cheng Lin ◽  
Zhi Feng Xu
Keyword(s):  
Control Strategy ◽  
Differential Effect ◽  
Differential Problem ◽  
Slip Control ◽  
Mechanical Connection ◽  
Simulation Results ◽  
Differential Control ◽  
Driving Torque ◽  
Self Adaptive

There is no mechanical connection between two driving motors of two-motor independent driven vehicle. In order to solve target vehicles differential problem, this paper has proposed self-adaptive differential control strategy, and based on that, has proposed anti-slip control strategy through limiting the motor driving torque. Then, the anti-slip differential effect has been tested by simulation. The simulation results have proved that good anti-slip differential effect can be realized by using the anti-slip differential control strategy proposed by this paper.

Study on Direct Torque Control Applied in the Electrical Propulsion Ship

2011 ◽  
Vol 354-355 ◽  
pp. 1252-1256
Author(s):  
You Tao Zhao ◽  
Yan Cheng Liu ◽  
Jun Jie Ren
Keyword(s):  
Electric Propulsion ◽  
Control Method ◽  
Direct Torque Control ◽  
Torque Control ◽  
Regulation System ◽  
Propulsion Systems ◽  
Speed Regulation ◽  
Imple Mentation ◽  
Electrical Propulsion ◽  
Simulation Results

With the development of AC (alternating current )technique, larger power PMSM ( permanent m- agnet synchronous motor ) has been applied in the marine electric propulsion systems. In this paper the imple- mentation of the DTC (direct torque control) systems for a variable-speed 4088kW PMSM in ship electric propulsion systems has been studied. A novel control method using SVPWM (space vector pulse width mo- dulation) was proposed and a SVPWM module was designed. Then a DTC – SVPWM simulation model of PMSM with the load of propeller was found. The simulation results shows that the variable frequency speed regulation system have good response performance in the process of the motor start or speedup and through comparing the simulation results with the experiment data of the PMSM, the validity of the model is verified.

scholarly journals Control method for the stable operation of distributed inverters following the introduction of large-scale renewable energy to a remote island grid

Clean Energy ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 196-207
Author(s):  
Shoichi Sato ◽  
Yasuhiro Noro
Keyword(s):  
Renewable Energy ◽  
Large Scale ◽  
Control Method ◽  
Synchronous Generator ◽  
Stable Operation ◽  
Battery Energy Storage Systems ◽  
Simulation Results ◽  
Battery Energy ◽  
Systems Simulation ◽  
Different Characteristics

Abstract The introduction of large-scale renewable energy requires a control system that can operate multiple distributed inverters in a stable way. This study proposes an inverter control method that uses information corresponding to the inertia of the synchronous generator to coordinate the operation of battery energy storage systems. Simulation results for a system with multiple inverters applying the control method are presented. Various faults such as line-to-line short circuits and three-phase line-to-ground faults were simulated. Two fault points with different characteristics were compared. The voltage, frequency and active power quickly returned to their steady-state values after the fault was eliminated. From the obtained simulation results, it was verified that our control method can be operated stably against various faults.

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