Control of the intake shock-position in the test rig for ramjet engine

Ohshima, Takao; Kanabe, Katsuhiro; Kimura, Hideo; Fujiwara, Kenji; Suzuki, Keiji; Yanagi, Ryoji

doi:10.2514/6.1997-2885

Cited by 10 publications

(8 citation statements)

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“…However, as mentioned earlier, since the engine operates in supersonic range, another critical requirement is to maintain the shock wave location [5,13] in the intake section of the engine as much forward as possible such that maximum pressure recovery is achieved. Nevertheless, it should also be assured that the shock neither gets detached nor gets too much inside the intake.…”

Section: Introductionmentioning

confidence: 98%

“…For this operation, using the sensed shock location as feedback, the active control of the inlet computed by the proportional control technique has been applied to drive the shock bleed in order to keep the shock stable in the presence of compressor and atmospheric disturbances. In [5], the shock position control design using the proportional-integral (PI) control technique has been discussed. It is mentioned in this reported reference that the shock position of the dummy intake can be controlled successfully by this technique and the rig-testing has been carried out to acquire for detection of the shock-position with http pressure transducers and to control the shock-position by the variable nozzle against disturbances as well.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear control of an air-breathing engine including its validation with vehicle guidance

Maity

Rajasekaran

Padhi

2015

Aerospace Science and Technology

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Nonlinear control of an air-breathing engine including its validation with vehicle guidance

Maity

Rajasekaran

Padhi

2015

Aerospace Science and Technology

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“…When the shock is maintained within the intake and as much towards the front as possible, the pressure recovery is high as there is more air flow rate, and vice versa [3][4][5]. Hence, the maintenance of the shock wave location [6] in the intake section of the engine is one critical requirement. To satisfy this secondary objective, the exhaust nozzle throat area serves to be a useful control variable, as it can manage the intake back pressure effectively [7,8] which in turn can control the terminal shock location in the intake.…”

Section: Introductionmentioning

confidence: 99%

Robust control design of an air‐breathing engine for a supersonic vehicle using backstepping and UKF

Maity

Padhi

2017

Asian Journal of Control

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This paper presents an efficient robust control design approach for an air‐breathing engine for a supersonic vehicle using the Lyapunov stability theory based nonlinear backstepping control, augmented with unscented Kalman filter (UKF). The primary objective of the control design is to ensure that the thrust produced by the engine tracks the commanded thrust by regulating the fuel flow to the combustion chamber. Moreover, as the engine operates in a supersonic range, an important secondary objective is to manage the shock wave location in the intake for maximum pressure recovery with adequate safety margin by varying the throat area of the nozzle simultaneously. To estimate the states and parameters as well as to filter out the process and sensor noises, a UKF has been incorporated for robust output feedback control computation. Furthermore, independent control designs for the actuators have been carried out to assure satisfactory performance of the engine. Additionally, a guidance loop is designed to generate a typical flight trajectory of the representative vehicle using a nonlinear suboptimal input constrained model predictive static programming formulation for testing the performance of the engine. Simulation results clearly indicate quite successful robust performance of the engine during both climb and cruise phases.

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“…In recent years, though, the problem has attracted much attention [9,10], and building on the earlier work on the dynamics of shocks in ducts [3,11], models that may be used for designing intake shock position controllers have been obtained [12,13]. However, it may be noted that all these models were limited to the intake alone and hence could not be directly used to study the effect of the exhaust nozzle throat area variation on the intake shock location.…”

Section: Introductionmentioning

confidence: 99%