Without Power Ampliication TRIZ Cases

A concentric harmonic drive, fault-tolerant motor, and passive brake shrink trim stabiliser actuator diameter while preventing reverse rotation after failure.

A duplex rotary EMA uses dual motors, brakes, and a common gearbox to keep output control during partial jamming at reduced speed and torque.

A torque-responsive trolley brake for flight controls cuts weight, drag torque, and part count while maintaining reliable variable braking.

A fixed and movable clutch lets an auxiliary actuator take over after main motor failure while preserving torque and stability.

Flexible soft stops engage before hard stops in a rotary EMA, absorbing impact loads and reducing gearbox stress at end positions.

Flexible soft stops absorb impact before hard-stop contact, limiting torque spikes and protecting the rotary EMA gearbox.

A solenoid synchronizer, ratchet, and cam let the spoiler actuator hold droop without power and block unwanted extension near wing flaps.

A torque-driven trolley converts input torque into braking contact force, cutting brake weight and drag while matching flight control loads.

An annular maglev rotor cuts VTOL noise and energy loss by using electromagnetic drive and blade pitch control instead of combustion.

A co-planar right-angle gear layout replaces extended drivetrains to limit heat exposure while preserving actuator stiffness, torque, and efficiency.

Integrated vanes on the worm wheel lift lubricant from the housing sump to the gear mesh, avoiding pumps and injectors while maintaining lubrication.

A planet carrier cam engages an interface plate to switch anti-extension by position, avoiding interference, seals, and contamination.

A pivot-mounted dual-load-path actuator uses proximity sensing to detect linkage faults and safely hold position after imbalance.

A mating coupling lets the flex spline deform radially while locking rotation, reducing wear and fatigue without sacrificing torque transfer.

Ball bearings engage helical grooves after drive failure, converting axial shaft motion into controlled rotation to reach a safe position.

Selective engagement using epicyclic gearing, clutches, and friction elements lets one drive take over a vehicle control surface if the other fails.

An integrated epicyclic roller carrier simplifies harmonic drive assembly, cuts parts count, and lowers flex spline contact stress.

A cam-driven locking element engages a secondary nut on the stabilizer shaft without aerodynamic load or sensors, improving backup load-path reliability.

Barrel-shaped rollers and flex spline teeth improve load distribution in a strain wave drive, cutting coning effects, wear, weight, and added compliance parts.

A secondary nut stays engaged with the screw thread, enabling smooth backup load transfer and immediate failure detection in safety-critical actuators.

A dual-mode hydraulic actuator lets landing gear extend under gravity while controlling chamber flow to cut structural loads and weight.

By integrating the wave generator into the carrier, this harmonic drive cuts part count and size while preserving high gear reduction.

An integrated wave generator in the carrier cuts part count and size while delivering high gear ratios for compact heavy-load actuation.

Opposed flex splines and earth annuli balance strain wave gear loads, reduce tooth mesh skewing, and keep the actuator compact.

A plunger-triggered push button replaces bulky indicator arms to give compact, reliable jam indication with fewer false alarms.

Two axially adjacent flexsplines remove tooth interference in harmonic drive assembly while simplifying manufacture and preserving profile flexibility.

Standardized sun, planet, and ring gears with the same modulus enable flexible drive modes, faster prototyping, and easier maintenance.

A manually adjustable load monitor simulates back-driven flight loads to verify no-back brake integrity before unintended actuator movement occurs.

A fluid-pressure lock and monolithic castle nut simplify actuator construction, cutting part count, servicing time, weight, and cost.

Opposing welded bellows confine hydraulic fluid in a rotary damper, removing dynamic seals to prevent leakage and reduce maintenance.

A screw-and-ball-bearing layout converts hydraulic axial motion into rotation in a compact actuator that reduces leakage in tight spaces.

Dual strain gauges compare static and nut assembly vibrations to detect primary load path failure before the secondary nut carries load.

Comparing vibration signals from strain gauges on the static portion and nut assembly reveals primary load path failure before backup load transfer is at risk.

A split rotary piston actuator uses central spherical bearing support and arcuate pistons to limit leakage and hold position accurately.

By integrating the rotation sensor with the actuator, this case avoids false angle readings from off-axis motion in aircraft control surfaces.

By integrating the rotation sensor with the actuator and screw drive, this case prevents false flight control angle readings during non-primary movement.

A spring-biased friction lock integrated with a damper holds aircraft pedal shafts without continuous power, cutting cockpit space and energy use.

Shared sun, carrier, and ring connections combine two epicyclic stages to deliver high gear ratio in a compact, manufacturable aircraft drive.

Two independently engageable drives let a vehicle control surface keep operating after one drive fails, while reducing wear during switching.

Two independently engageable drives let a vehicle control surface keep moving after one drive fails, improving continuity and redundancy.

A lead screw, nut, and slot-pin lever replace bulky canard linkages to deliver compact actuation, higher bandwidth, and no hold power.

A curved wave generator cam and self-aligning roller bearings spread load evenly in a strain wave drive, cutting compliance parts, weight, and cost.

A motor-driven lock shaft and linear actuator hold aircraft control surfaces against gust loads without continuous battery draw.

Mechanical cams on the planet carrier switch anti-extension by output-ring position, preventing droop interference during power loss.

By forming the hydraulic actuator housing within the control surface, this case cuts assembly weight, bulk, and component complexity.

A timing-gear pawl and deformable stopping disk absorb end-of-stroke kinetic energy without friction, preventing jamming while cutting actuator size and weight.

Compound differential gearing and contoured gear seats transfer control-surface torque in thin composite wings without damaging the structure.

A switchable differential lock shifts between torque-summing and velocity-summing modes to prevent flight control surface free-float.

A ball-bearing compliant attachment lets a wing-mounted rotary actuator absorb deflection and thermal expansion without damage or loss of precision.

A straight tubular flex spline and sandwiched ring gears remove coning, cutting strain wave drive size, weight, and manufacturing complexity.

A lever-driven dual-link mechanism amplifies input force to reciprocate a locking collar and secure a main rod without a bulky actuator.

A compact rotary actuator inside the wing replaces linear actuation to preserve control surface positioning while reducing thickness and drag.

A split gimbal with post-and-receiver coupling enables compact, lighter high-lift actuation while reducing shaft bending during force transfer.

Balanced spline and ground gear layout redistributes reaction forces to prevent actuator binding and off-axis motion in flight control drives.

Three pivot joints with staged foot pedal locking enable wide steering wheel range while preventing loose-jointed instability during driving.