This paper deals with models of the rockets' motion around mass centre, command laws of vert... more This paper deals with models of the rockets' motion around mass centre, command laws of vertical and horizontal planes trajectory, stabilisation laws of the roll motion of the rockets and target control laws (1), (2). One also studies the way to choose of the parameters of general command laws which assures state variables simultaneous cancellation. Some automatic control systems, using the previous laws, are also presented. Also, one presents some extremal systems for optimization of aircrafts and rockets' flight using test signals for extreme's search (3), (4).
The paper presents a new algorithm for optimal control law's synthesis in rapport with state vect... more The paper presents a new algorithm for optimal control law's synthesis in rapport with state vector of the aircraft's move. Starting from state equation of the movement, the system is brought to Jordan canonic form and Riccati algebraic matricidal equation (whose solution is the gain matrix of the control law) is brought to an equivalent form with transformation relation. The new gain matrix is partitioned conform to equations (35) ÷ (40). Using ALGLX algorithm, one studies elastic no deformed (no dimensional description) longitudinal and lateral move of an aircraft and dimensional elastic deformed move. One obtained Matlab/Simulink models and numerical programs and with them time characteristics expressing state variables' dynamic are obtained.
The paper presents a concrete case of an actual aircraft electric power system analysis. Using th... more The paper presents a concrete case of an actual aircraft electric power system analysis. Using the Boolean logical structures we define a conceptual fault tree. The fault tree will express all the combination of factors that can lead to system failure in the onboard electric system. The further on analysis rely on AND -OR logic elements, and the goal is to improve the fault-tolerance behavior of the system. The examples and numeric figures are for a c.c. electric power system of an operational aircraft.
In this paper one presents an algorithm for project of a reduced order observer (ALGLOOR) with ap... more In this paper one presents an algorithm for project of a reduced order observer (ALGLOOR) with applications to flying objects' move. The command law is an optimal one in rapport with state vector of the observer. Numeric calculus examples are also presented: for longitudinal and lateral move and vertical move of a rocket in vertical plane in rapport with equal signal line; using Matlab/Simulink model of closed loop system one has made numeric calculus programs and with them one obtained different time characteristics, which expresses state variables' dynamics of the flying objects dynamic models.
This paper deals with models of the rockets' motion around mass centre, command laws of vert... more This paper deals with models of the rockets' motion around mass centre, command laws of vertical and horizontal planes trajectory, stabilisation laws of the roll motion of the rockets and target control laws (1), (2). One also studies the way to choose of the parameters of general command laws which assures state variables simultaneous cancellation. Some automatic control systems, using the previous laws, are also presented. Also, one presents some extremal systems for optimization of aircrafts and rockets' flight using test signals for extreme's search (3), (4).
The paper presents a new algorithm for optimal control law's synthesis in rapport with state vect... more The paper presents a new algorithm for optimal control law's synthesis in rapport with state vector of the aircraft's move. Starting from state equation of the movement, the system is brought to Jordan canonic form and Riccati algebraic matricidal equation (whose solution is the gain matrix of the control law) is brought to an equivalent form with transformation relation. The new gain matrix is partitioned conform to equations (35) ÷ (40). Using ALGLX algorithm, one studies elastic no deformed (no dimensional description) longitudinal and lateral move of an aircraft and dimensional elastic deformed move. One obtained Matlab/Simulink models and numerical programs and with them time characteristics expressing state variables' dynamic are obtained.
The paper presents a concrete case of an actual aircraft electric power system analysis. Using th... more The paper presents a concrete case of an actual aircraft electric power system analysis. Using the Boolean logical structures we define a conceptual fault tree. The fault tree will express all the combination of factors that can lead to system failure in the onboard electric system. The further on analysis rely on AND -OR logic elements, and the goal is to improve the fault-tolerance behavior of the system. The examples and numeric figures are for a c.c. electric power system of an operational aircraft.
In this paper one presents an algorithm for project of a reduced order observer (ALGLOOR) with ap... more In this paper one presents an algorithm for project of a reduced order observer (ALGLOOR) with applications to flying objects' move. The command law is an optimal one in rapport with state vector of the observer. Numeric calculus examples are also presented: for longitudinal and lateral move and vertical move of a rocket in vertical plane in rapport with equal signal line; using Matlab/Simulink model of closed loop system one has made numeric calculus programs and with them one obtained different time characteristics, which expresses state variables' dynamics of the flying objects dynamic models.
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Papers by Nicolae Jula