Engineering Sciences
MPSI (Engineering Prep)

Engineering Sciences MPSI (Engineering Prep) Revision Sheets

Engineering Sciences (SII) in MPSI study modern industrial systems: modeling, analysis, design. It's the subject that forms the "engineering mindset" combining mechanics, automatic control and power electronics.

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Engineering Sciences curriculum in MPSI (Engineering Prep)

The curriculum covers six competencies: analyze, model, solve, experiment, communicate, design. Concretely, it covers rigid solid kinematics and statics, power transmission chains, automatic control (linear servos, transfer function, stability), and functional analysis of systems (SysML, state diagrams).

Functional analysis and SysML
Solid kinematics: wrenches, motion composition
Solid statics: equilibrium, isolation, theorems
Power transmission: gears, clutches
Linear servos: transfer function, Laplace
Stability and performance: Routh, Bode, Nyquist
Sensors and actuators
Mechanical system modeling

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Tips to succeed in engineering sciences MPSI (Engineering Prep)

1
Tip 1

SII is very methodical: ALWAYS follow the same functional analysis grid (horned beast, A-0, A-1, FAST)

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Tip 2

Master usual Laplace transforms: they structure the entire control curriculum

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Tip 3

Work with simulation software (Matlab/Simulink, Scilab) to visualize dynamic behaviors

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Tip 4

For stability, memorize standard plots (Bode 1st order, 2nd order, integrator): more efficient than recalculating each time

FAQ — Engineering Sciences MPSI (Engineering Prep)

Should I choose MPSI with or without SII?

MPSI without SII (computer science option) is now MP2I. Choice depends on your project: MPSI-SII for Mines-Ponts, Centrale, ENSAM, industrial engineering schools; MP2I for computer science or Télécom Paris, X. SII coefficient weighs 8-10% at concours for MP (from MPSI-SII), often less for PSI. If unsure, MPSI-SII keeps more doors open.

How do I succeed in SII MPSI servo problems?

Three systematic steps: 1) model the system as a transfer function (use Laplace), 2) analyze stability (Routh-Hurwitz criterion, Bode/Nyquist plots) and performance (speed, precision, margin), 3) correct if needed (P, PI, PID). Master the 5 typical transfer functions (1st order, 2nd order damped/under-damped, integrator, derivative): 80% of exercises reduce to these.

Is SII less important than math in MPSI?

Yes in hours (4-6h vs 12h for math) and coefficient (~10% vs ~30% at concours). But it's the subject where you can "stand out": few students invest seriously, while examiners strongly value methodological mastery. With 3 hours of regular work weekly, you get a decent grade that can make the difference between HEC and top 5 engineering schools.

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